BRANDYWINE REALTY TRUST
10-K, 1999-03-31
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>

                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-K

(Mark One)

(X)    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND
EXCHANGE ACT OF 1934 (FEE REQUIRED)

For the fiscal year ended    December 31, 1998
                             -------------------------------------------------
                                       OR
( )    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND
EXCHANGE ACT OF 1934 (NO FEE REQUIRED)

For the transition period from                      to 
                              ---------------------    -----------------------

Commission file number             1-9106
                       -------------------------------------------------------

                             Brandywine Realty Trust
- - ------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

          Maryland                                      23-2413352
- - --------------------------------          ------------------------------------
State or other jurisdiction of            (I.R.S. Employer Identification No.)
Incorporation or organization


 14 Campus Boulevard, Newtown Square, Pennsylvania                19073
- - ------------------------------------------------------------------------------
    (Address of principal executive offices)                    (Zip Code)

Registrant's telephone number, including area code    (610) 325-5600
                                                   ---------------------------

           Securities registered pursuant to Section 12(b) of the Act:

                                                    Name of each exchange
       Title of each class                           on which registered

Common Shares of Beneficial Interest,
    (par value $0.01 per share)                    New York Stock Exchange
- - --------------------------------------          ------------------------------

           Securities registered pursuant to Section 12(g) of the Act:

- - -------------------------------------------------------------------------------
                                (Title of class)

- - -------------------------------------------------------------------------------
                                (Title of class)
<PAGE>

         Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes [X] No [ ]

         Indicate by check mark if disclosure of delinquent filers pursuant to
Item 405 of Regulation S-K is not contained herein, and will not be contained,
to the best of Registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [X]

         The aggregate market value of the voting shares held by non-affiliates
of the registrant was approximately $628.9 million as of March 15, 1999. The
aggregate market value has been computed by reference to the closing price at
which the Common Shares of Beneficial Interest were sold on the New York Stock
Exchange on such date. An aggregate of 38,011,655 Common Shares of Beneficial
Interest were outstanding as of March 15, 1999.


                       Documents Incorporated By Reference


None

























                                      -2-
<PAGE>

                                TABLE OF CONTENTS

                                    FORM 10-K

<TABLE>
<CAPTION>
                                                                                                        Page
                                                                                                        ----
<S>                                                                                                     <C>
PART I...................................................................................................4

   Item 1.      Business.................................................................................4
   Item 2.      Properties..............................................................................18
   Item 3.      Legal Proceedings.......................................................................31
   Item 4.      Submission of Matters to a Vote of Security Holders.....................................32

PART II.................................................................................................32

   Item 5.      Market for Registrant's Common Equity and Related Shareholder Matters...................32
   Item 6.      Selected Financial Data.................................................................34
   Item 7.      Management's Discussion and Analysis of Financial Condition and Results of Operations...34
   Item 7A.     Quantitative and Qualitative Disclosure About Market Risk...............................41
   Item 8.      Financial Statements and Supplementary Data.............................................41
   Item 9.      Changes in and Disagreements with Accountants on Accounting and Financial Disclosure....41

PART III................................................................................................41

   Item 10.     Trustees and Executive Officers of the Registrant.......................................41
   Item 11.     Executive Compensation..................................................................45
   Item 12.     Security Ownership of Certain Beneficial Owners and Management..........................51
   Item 13.     Certain Relationships and Related Transactions..........................................53

PART IV.................................................................................................56

   Item 14.     Exhibits, Financial Statement Schedules and Reports on Form 8-K.........................56
</TABLE>

















                                      -3-
<PAGE>

                                     PART I

Item 1.  Business

General

         Brandywine Realty Trust (collectively with its subsidiaries, the
"Company") is a self-administered and self-managed real estate investment trust
("REIT") active in acquiring, developing, redeveloping, leasing and managing
office and industrial properties. As of December 31, 1998, the Company owned a
portfolio of 201 office properties, 70 industrial facilities and one mixed use
property (the "Properties") that contained an aggregate of approximately 18.8
million net rentable square feet. As of December 31, 1998, the Properties
(excluding two properties under development or redevelopment) were approximately
93.6% leased to 1,357 tenants and had an average age of approximately 14.6
years. As of December 31, 1998, 183 of the 272 Properties (approximately 62.8%
of the Company's portfolio based on net rentable square feet) were located in
the Suburban Philadelphia Office and Industrial Market. The term "Suburban
Philadelphia Office and Industrial Market" or "Market" means the areas comprised
of the following counties: Berks, Bucks, Chester, Delaware, Lehigh, Montgomery
and Northampton in Pennsylvania and Burlington and Camden in New Jersey.

         As of December 31, 1998, 11 tenants individually represented more than
1.0% of the Company's annualized minimum rent, none of which represent 10%. The
Company's 11 largest tenants accounted for approximately 20.8% of annualized
minimum rent for the year ended December 31, 1998.

         As of December 31, 1998, the Company also owned or held options to
purchase approximately 457.0 acres of land for future development.

         As of December 31, 1998, the Company owned economic interests, ranging
from 35% to 65%, in nine office development joint ventures (the "Real Estate
Ventures"). Three of the Real Estate Ventures own three suburban office
buildings that contain an aggregate of approximately 323,000 net rentable square
feet. Two other Real Estate Ventures are currently redeveloping or developing
two suburban office buildings that are expected to contain an aggregate of
approximately 243,000 net rentable square feet upon completion in 1999.
As of December 31, 1998, the Real Estate Ventures also owned or held options to
purchase approximately 46.8 acres of land for future development. As of December
31, 1998, the Company had invested or committed to invest a total of
approximately $27.9 million in the Real Estate Ventures.

         The Company's business objectives are to:

     o   maximize cash flow through leasing strategies designed to capture
         potential rental growth as rental rates increase and as below-market
         leases are renewed;

     o   ensure a high tenant retention rate through an aggressive tenant
         services program responsive to the varying needs of the Company's
         diverse tenant base;

     o   broaden its geographic and economic diversification while maximizing
         economies of scale;

     o   acquire high-quality office and industrial properties and portfolios of
         such properties at attractive yields in selected submarkets within the
         Mid-Atlantic region (including Delaware, Maryland, New Jersey, New
         York, Pennsylvania, Virginia and the District of Columbia), which
         management expects will experience economic growth;

     o   capitalize on management's redevelopment expertise to selectively
         acquire, redevelop and reposition underperforming properties in
         desirable locations;

                                      -4-
<PAGE>

     o   acquire land in anticipation of developing office or industrial
         properties on a build-to-suit basis, under circumstances where
         significant pre-leasing can be arranged or as otherwise warranted by
         market conditions;

     o   enhance the Company's investment strategy through the pursuit of joint
         venture opportunities with high quality partners having attractive real
         estate holdings or significant financial resources; and


     o   execute an investment strategy that effectively balances creating
         long-term growth opportunities with the Company's public market
         valuation.

         In pursuit of its business objectives, the Company has recently
experienced rapid growth. Between January 1, 1997 and March 15, 1999, the
Company acquired 168 office properties containing approximately 12.9 million net
rentable square feet, 67 industrial facilities containing approximately 3.9
million net rentable square feet and one mixed use property containing
approximately 167,760 net rentable square feet and, together with the Real
Estate Ventures, acquired ownership of, or rights to acquire, approximately
503.8 acres of undeveloped land. The aggregate purchase price for the 236
Properties acquired by the Company between January 1, 1997 and March 15, 1999
was approximately $1.7 billion. During this period, the Company also sold one
office property containing approximately 156,175 net rentable square feet for a
net sales price of approximately $14.7 million. During such period, the Company
also completed the development or redevelopment of three office properties and
one industrial facility containing an aggregate of approximately 388,000 net
rentable square feet for aggregate development costs, including the cost of
acquiring land, of approximately $28.6 million.

         The Company expects to continue to concentrate its real estate
activities in submarkets within the Mid-Atlantic region where it believes that:
(i) barriers to entry (such as zoning restrictions, utility availability,
infrastructure limitations, development moratoriums and limited developable
land) will create supply constraints on office and industrial space; (ii)
current market rents and absorption statistics justify limited new construction
activity; (iii) it can maximize market penetration by accumulating a critical
mass of properties and thereby enhance operating efficiencies; and (iv) there is
potential for economic growth.

         The Company's executive offices are located at 14 Campus Boulevard,
Suite 100, Newtown Square, Pennsylvania 19073 and its telephone number is (610)
325-5600.

Organization

         The Company was organized and commenced its operations in 1986 as a
Maryland real estate investment trust. The Company owns its assets and conducts
its operations through Brandywine Operating Partnership, L.P. (the "Operating
Partnership") and subsidiaries of the Operating Partnership. As of December 31,
1998, the Company's ownership interest in the Operating Partnership was
approximately 88.5% and the Company was entitled to 94.6% of the Operating
Partnership's income after distributions by the Operating Partnership to holders
of its preferred units. The structure of the Company as an "UPREIT" is designed,
in part, to permit persons contributing properties (or interests in properties)
to the Company to defer some or all of the tax liability they might otherwise
incur. The Company conducts its real estate management services through a
management company (the "Management Company"). The Company, through its indirect
ownership of preferred and common stock of the Management Company, is entitled
to receive 95% of amounts paid as dividends by the Management Company. See "--
Management Company."

Equity Offerings

         Since January 1, 1998, the Company has consummated four underwritten
public offerings pursuant to which the Company issued an aggregate of 13,267,741
Common Shares and raised aggregate net proceeds of approximately $301.0 million.
The Company contributed the net proceeds from these offerings to the Operating
Partnership.

                                      -5-
<PAGE>

         On February 4, 1998, the Company consummated an underwritten public
offering of 10,000,000 Common Shares at a price to the public of $24.00 per
share. On March 6, 1998, the Company issued an additional 1,000,000 Common
Shares pursuant to exercise by the underwriters of their over-allotment option.
Proceeds to the Company were used to repay indebtedness and for working capital
purposes.

         On February 18, 1998, the Company consummated an underwritten public
offering of 1,012,820 Common Shares at a price to the public of $24.06 per
share. Proceeds to the Company were used to repay indebtedness.

         On February 27, 1998, the Company consummated an underwritten public
offering of 629,921 Common Shares at a price to the public of $23.81 per share.
Proceeds to the Company were used to repay indebtedness.

         On April 21, 1998, the Company consummated an underwritten public
offering of 625,000 Common Shares at a price to the public of $24.00 per share.
Proceeds to the Company were used to repay indebtedness.

         In addition, both the Company and the Operating Partnership have issued
their securities as part of the acquisition consideration for certain
properties.

          On March 31, 1998, the Operating Partnership issued 153,036 Class A
Units of limited partnership interest ("Class A Units"), which are redeemable
for an equal number of Common Shares, to acquire a portfolio of six office and
industrial properties.

         On May 8, 1998, the Operating Partnership issued 390,364 Class A Units
to acquire a portfolio of 11 office and industrial properties.

         On September 29, 1998, the Operating Partnership issued 1,550,000
Series B Preferred Units of limited partnership interest ("Series B Preferred
Units") and the Company issued 750,000 Series A Preferred Shares to acquire a
portfolio of 67 office and industrial properties.

         On October 6, 1998, the Operating Partnership issued 1,127,895 Class A
Units to acquire a portfolio of 26 office and industrial properties.

         On December 31, 1998, the Operating Partnership issued 83,468 Class A
Units to acquire an office property.

Credit Facility

         At December 31, 1997, the Company maintained a $150.0 million secured
credit facility (the "1997 Credit Facility") which bore interest at LIBOR plus
175 basis points.

         During the first quarter of 1998, the Company replaced the 1997 Credit
Facility with a $330.0 million unsecured credit facility (the "1998 Credit
Facility"). The 1998 Credit Facility bore interest at a reduced interest rate
equal to the 30, 60, 90 or 180-day LIBOR plus, in each case, a range of 100 to
137.5 basis points based on the Company's leverage and debt rate. Alternatively,
the Company could have borrowed funds at a base rate equal to the higher of the
Prime Rate and Fed Funds Rate plus 50 basis points.

         During the third quarter of 1998, the Company replaced the 1998 Credit
Facility with a new $550.0 million credit facility (the "New 1998 Credit
Facility") from NationsBank, N.A. The New 1998 Credit Facility is currently
unsecured, but can convert to a secured borrowing if certain leverage
requirements are not met by March 31, 1999. The interest rate borne by the New
1998 Credit Facility was LIBOR plus 150 basis points initially, with the spread
over LIBOR subject to reductions between 12.5 to

                                      -6-
<PAGE>

35 basis points and a possible increase of 25 basis points based on the
Company's leverage. The spread over LIBOR may also be reduced to either 115 or
100 basis points depending upon the Company's long-term debt rating. The New
1998 Credit Facility matures in September 2001 and requires the Company to
maintain ongoing compliance with a number of customary financial and operational
covenants including leverage ratios and debt service coverage ratios,
limitations on liens and distributions and a minimum net worth requirement. On
December 31, 1998, there was approximately $531.3 million of indebtedness
outstanding under the New 1998 Credit Facility.

Additional Facility

         During the second quarter of 1998, the Company entered into a $150.0
million unsecured credit facility (the "Additional Facility") to facilitate
certain property acquisitions. The Additional Facility bore interest at LIBOR
plus 150 basis points or, at the Company's option, the Prime Rate plus 25 basis
points.

         During the third quarter of 1998, the Company replaced the Additional
Facility with a new $150.0 million unsecured credit facility (the "New
Additional Facility") from NationsBanc Mortgage Capital Corp. The New Additional
Facility bore interest at LIBOR plus 200 basis points and was scheduled to
mature on March 31, 1999. On December 31, 1998, there was approximately $150.0
million of indebtedness outstanding under the New Additional Facility.

         During the first quarter of 1999, the Company repaid all amounts
outstanding under the New Additional Facility. The Company funded its repayment
with a portion of the proceeds of a $119.0 million mortgage loan secured by four
properties and a $75.0 million mortgage loan secured by five properties.

Mortgage and Certain Other Debt

         Mortgage and Certain Other Indebtedness. The following table sets forth
the Company's mortgage and certain other indebtedness outstanding at December
31, 1998.



















                                      -7-
<PAGE>

                                                      Property -- Indebtedness

<TABLE>
<CAPTION>
                                                           Principal
                                                            Balance
                                                             as of         Interest        Annual
                                                           December 31,   Rate as of        Debt
                                                              1998        December 31,     Service         Maturity       Prepayment
                 Property / Location                       (in 000's)        1998       (in 000's)(a)        Date          Premiums
- - -------------------------------------------------------    ------------   ------------  -------------   ---------------   ----------
<S>                                                        <C>            <C>            <C>             <C>               <C>
Newtown Square, PA
     Lots 7, 8 and 9 of Newtown Square Business Campus         819           9.00%           862            2/99    (b)      None
     Lot 13 of Newtown Square Business Campus                5,323           7.07%            (c)           6/99              N/A
Allentown, PA                                                                                             
     7310 Tilghman Street                                    2,478           9.25%           257            3/00               (d)
Reading, PA                                                                                               
     Green Hills (undeveloped land)                          1,000           5.00%           565        8/99 to 8/00         None
Marlton, NJ                                                                                               
     One - Three Greentree Centre (e)                        6,964           7.56%           708            1/02               (f)
Cherry Hill, NJ                                                                                           
     457 Haddonfield Road                                    8,148           8.00%           814            1/99    (g)        (h)
     Fit up (i)                                                805           9.25%            74            1/99    (g)      None
     One South Union Place                                   8,092           6.94%             0            6/99              N/A
Mt. Laurel, NJ                                                                                            
     1120 Executive Plaza                                    5,665           9.88%           832            3/02               (j)
     1000 Howard Boulevard                                   5,505           9.25%           803            11/04              (k)
Raleigh, NC                                                                                               
     5910 - 6090 Six Forks                                   2,593           7.56%           264            1/02               (l)
East Norriton, PA                                                                                         
     Norriton Office Center                                  5,625           8.50%           523            10/07              (m)
Lawrenceville, NJ                                                                                         
     1009 Lenox Drive                                       15,342           8.75%         1,492            7/03             None
Horsham, PA                                                                                               
     655 and 755 Business Center Drive                       5,862           7.07%             0            6/99              N/A
Grande A (n)                                                72,599           7.48%         1,860            7/27               (o)
Grande A (n)                                                30,000           6.21%           474            7/27               (p)
Grande A (n)                                                20,000           6.04%           309            7/27               (q)
Grande B (r)                                                86,869           7.48%         1,860            7/27               (s)
Richmond, Va                                                                                              
     Arboretum I, II, III & V (t)                           25,800           8.00%           516            1/01
     Interstate Center                                       5,700           6.88%            98            3/99             None
     Interstate Center                                       1,740           6.40%            55            4/07             None
Bucks County, PA                                                                                          
     Greenwood Square I, II, III (u)                         1,221           8.00%            83            12/99            None
Camp Hill, PA                                                                                             
     Corporate Center Drive (v)                              1,085           8.00%            48            6/01             None
                                                          --------                       -------
     Total Mortgage and Certain Other
       Indebtedness                                       $319,235                       $12,497      
                                                          ========                       =======
</TABLE>

(a)  "Annual Debt Service" is calculated by annualizing the normal principal and
     interest amortization. For loans that bear interest at a variable rate, the
     rates in effect at December 31, 1998 have been assumed to remain constant.
     Loans with zero Annual Debt Service represent construction loans having no
     principal or monthly interest payments.

(b)  As of the date of this Form 10-K, this loan has been repaid in full.

(c)  Construction loan with no monthly interest or principal payments, all of
     which becomes due at maturity.

(d) Two percent through December 31, 1998, which prepayment penalty is reduced
    by 1% in 1999.

(e) All of these properties secure a single loan.

(f) This loan may not be prepaid unless the 5910-6090 Six Forks loan is also
    prepaid. The prepayment penalty equals the greater of 1% of the principal
    amount prepaid or a yield maintenance premium.

(g) Subsequent to December 31, 1998, these loans have been extended until
    January 1, 2001 with a floating rate of prime or LIBOR plus 225 basis 
    points. 

                                      -8-
<PAGE>

(h)  One percent of the amount of the loan prepaid.

(i)  Pursuant to the terms of this loan, the Company has the right to borrow up
     to approximately $1.3 million to fund tenant improvements and leasing
     commissions.

(j)  No payment is permitted until November, 1999, at which time this loan may
     be prepaid in full (but not in part) along with a penalty equal to the
     greater of 1% of the principal amount prepaid or a yield maintenance
     premium.

(k)  No prepayment is permitted unit March 1999, at which time this loan may be
     prepaid in full (but not in part) along with a penalty equal to the greater
     of 1% of the principal amount prepaid or a yield maintenance premium.

(l)  This loan may be prepaid without prepayment of the loan secured by
     One-Three Greentree Centre, provided certain loan-to-value ratios and
     coverage tests with regard to the One-Three Greentree Centre loan are
     satisfied and upon payment of a premium equal to the greater of 1% of the
     principal amount prepaid or a yield maintenance premium.

(m)  No prepayment is permitted until September, 2000, at which time this loan
     may be prepaid in full together with a yield maintenance premium based upon
     treasury rates.

(n)  Consists of 35 Properties, at various locations, acquired on September 28,
     1998.

(o)  No prepayment is permitted until July 11, 2007, at which time this loan may
     be prepaid in full without penalty.

(p)  Two percent through July 1999, which prepayment penalty is reduced to 1%
     through July 2000. After July 2000, there is no prepayment penalty.

(q)  Two percent through July 1999, which prepayment penalty is reduced to 1%
     through July 2000. After July 2000, there is no prepayment penalty.

(r)  Consists of 25 Properties, at various locations, acquired on September 28,
     1998.

(s)  No prepayment is permitted until July 11, 2007, at which time this loan may
     be prepaid in full without penalty.

(t)  The Company purchased these properties on September 28, 1998, and received
     the economic benefits and liabilities of such properties from September 29,
     1998, although transfer of title did not occur until March 11, 1999.

(u)  The Company incurred unsecured debt in the principal amount of $3.8 million
     on November 14, 1996 in connection with its acquisition of a property
     portfolio. The debt does not bear interest and is payable in two
     installments: the first installment of $2.5 million was paid on June 30,
     1998; the second installment of $1.3 million is payable on December 31,
     1999. The Company recorded a $548,000 adjustment to the purchase price and
     a corresponding reduction in debt to reflect the fair value of the note
     payable to the seller and will accrue interest expense to the date of
     maturity.

(v)  The Company incurred unsecured debt in the principal amount of $1.3 million
     on May 8, 1998 in connection with its acquisition of a property portfolio.
     The debt is payable in full on June 30, 2001. The Company recorded a
     $255,000 adjustment to the purchase price and a corresponding reduction in
     debt to reflect the fair value of the note payable to the seller and will 
     accrue interest expense to the date of maturity.

         Guaranty. As of March 15, 1999, the Company had guaranteed repayment of
an $18.7 million construction loan made to a Real Estate Venture (a portion of
which guaranty was in the form of a commitment by the Company to contribute
approximately $6.4 million in equity to the Real Estate Venture).

                                      -9-

<PAGE>

Management Company

         The Company conducts its real estate management services business
through the Management Company. The Company manages, through the Management
Company, certain of the Properties and additional properties on behalf of
unaffiliated third parties. As of December 31, 1998, the Management Company was
managing properties containing an aggregate of approximately 17.1 million net
rentable square feet, of which approximately 16.9 million net rentable square
feet related to Properties then owned by the Company or subject to purchase
options held by the Company, and approximately 258,695 net rentable square feet
related to properties owned by unaffiliated third parties. Through its indirect
ownership of 100% of the preferred stock and 5% of the common stock of the
Management Company, the Operating Partnership is entitled to receive 95% of
amounts paid as dividends by the Management Company. Because certain executive
officers of the Company indirectly own 95% of the voting common stock of the
Management Company, the Company does not control the timing or amount of
distributions by, or the management and operations of, the Management Company.
The Management Company has made no distributions to any executive officers of
the Company since its inception.

Industry Segments

         The Company operates in one industry segment. The Company does not have
any foreign operations and its business is not seasonal.

Competition

         The leasing of real estate is highly competitive. The Properties
compete for tenants with similar properties located in its markets primarily on
the basis of location, rent charged, services provided, and the design and
condition of the improvements. The Company also faces competition when
attempting to acquire real estate, including competition from domestic and
foreign financial institutions, other REIT's, life insurance companies, pension
trusts, trust funds, partnerships and individual investors.

Employees

         As of December 31, 1998, the Company employed 198 persons, including
executive officers.

Risk Factors

         An investment in the Company involves various risks. Our actual results
may differ significantly from those expressed or implied by forward-looking
statements made by us or on our behalf. These statements are identified by words
such as "expect," "anticipate," "should," "pro forma" and words of similar
import. Factors that might cause such a difference include the various risks
stated below that we believe are material to investors who purchase or own our
securities. Prospective investors should carefully consider the following risk
factors together with the other reports and documents we file with the
Securities and Exchange Commission, which may include additional or more current
relevant information.

o   There can be no assurance that we will effectively manage our rapid growth

         We have been growing rapidly. Since August 1, 1996, we have acquired or
developed 268 of the 272 Properties owned by us on December 31, 1998. We have
managed this growth by applying our experience to newly acquired properties and
we expect continued success in that effort. No assurances can be given, however,
that we will succeed in our integration efforts or that newly acquired
properties will perform as we expect.

o   We depend on the performance of our primary markets, and changes in such
    markets may adversely affect our financial condition

                                      -10-
<PAGE>

         Most of our Properties are currently located in suburban markets in
Pennsylvania, New Jersey, New York, Virginia and Delaware. Like other real
estate markets, these commercial real estate markets have experienced economic
downturns in the past, and future declines in any of these real estate markets
could adversely affect our operations or cash flow and ability to make
distributions to shareholders. Our financial performance will be particularly
sensitive to the economic conditions in these markets. Our revenues and the
value of our Properties may be adversely affected by a number of factors,
including the economic climate in these markets (which may be adversely impacted
by business layoffs, industry slowdowns, changing demographics and other
factors) and real estate conditions in these markets (such as oversupply of or
reduced demand for office and industrial properties). These factors, when and if
they occur in the area in which our Properties are located, would adversely
affect our cash flow and ability to make distributions to shareholders.

o   Our ability to make distributions is subject to various risks

         We pay regular distributions to our shareholders. Our ability to make
distributions in the future will depend upon:

         o  the performance of our Properties;

         o  expenditures with respect to existing and newly acquired properties;

         o  the amount of, and the interest rates on, our debt;

         o  the absence of significant expenditures relating to environmental
            and other regulatory matters; and

         o  future sales of securities.

Certain of these matters are beyond our control and any significant difference
between our expectations and actual results could have a material adverse effect
on our cash flow and our ability to make or sustain distributions to
shareholders.


o   We may be unable to renew leases or relet space as leases expire

         If our tenants fail to renew their leases upon expiration, we may be
unable to relet the subject space. Even if the tenants do renew their leases or
we can relet the space, the terms of renewal or reletting (including the cost of
required renovations) may be less favorable than current lease terms. Certain
leases grant the tenants an early termination right upon payment of a
termination penalty. While we have estimated the necessary expenditures for new
and renewal leases for 1999 and 2000, no assurances can be given as to the
accuracy of such estimates.

o   Financially distressed tenants may limit our ability to realize the value of
    our investments

         Following a tenant's lease default, we may experience delays in
enforcing our rights as a landlord and may incur substantial costs in protecting
our investment. In addition, a tenant may seek bankruptcy law protection which
could relieve the tenant from its obligation to make lease payments.

o  We face significant competition from other real estate developers

         We compete with a number of real estate developers, operators and
institutions for tenants and acquisition opportunities. Some of these
competitors have significantly greater resources than we do. No assurances can
be given that this competition will not adversely affect our cash flow and
ability to make distributions to shareholders.

                                      -11-
<PAGE>

o  Because real estate is illiquid, we may not be able to sell properties when
   appropriate

         Real estate investments generally cannot be sold quickly. We may not be
able to vary our portfolio promptly in response to economic or other conditions.
In addition, the Internal Revenue Code of 1986 (the "Code") limits our ability
to sell properties held for fewer than four years. Purchase options and rights
of first refusal held by certain tenants may also limit our ability to sell
certain properties. Any of these factors could adversely affect our cash flow
and ability to make distributions to shareholders as well as the ability of
someone to purchase us, even if a purchase were in our shareholders' best
interests.

o   We have agreed not to sell certain of our properties

         We have agreed with the sellers of certain of our properties not to
sell certain properties for varying periods of time in any transaction that
would trigger taxable income, subject to certain exceptions. Some of these
agreements are with current trustees of our company. In addition, we may enter
into similar agreements with future sellers of properties. These agreements
generally provide that we may dispose of the applicable properties in
transactions that qualify as tax-free exchanges under Section 1031 of the Code.
Therefore, without suffering adverse tax consequences, we may be precluded from
selling certain properties other than in transactions that would qualify as
tax-free exchanges for federal income tax purposes.

o   Changes in the law may adversely affect our cash flow

         Because increases in income and service taxes are generally not passed
through to tenants under leases, such increases may adversely affect our cash
flow and ability to make expected distributions to shareholders. The Properties
are also subject to various regulatory requirements, such as those relating to
fire and safety. Our failure to comply with these requirements could result in
the imposition of fines and damage awards. While we believe that the Properties
are currently in material compliance with all such requirements, there can be no
assurance that these requirements will not change or that newly imposed
requirements will not require significant unanticipated expenditures.

o   By holding properties through the Operating Partnership and various joint
    ventures, we are exposed to certain additional risks

         We own our Properties and our interests in our real estate ventures
through the Operating Partnership. In the future, we expect to continue to
participate with other entities in property ownership through joint ventures or
partnerships. Partnership or joint venture investments may, under certain
circumstances, involve risks not otherwise present in direct investments. Such
risks include:

         o  the potential bankruptcy of our partners or co-venturers;

         o  a conflict between our business goals and those of our partners or
            co-venturers; and

         o  actions taken by our partners or co-venturers contrary to our
            instructions or objectives, including our policy of  maintaining the
            Company's REIT qualification.

         We will, however, seek to maintain sufficient control of such
partnerships and joint ventures to enable us to achieve our business objectives.
Investors should be aware that there is no limitation under our organizational
documents as to the amount of funds which we may invest in partnerships or joint
ventures.

                                      -12-

<PAGE>

o    Future acquisitions may fail to perform in accordance with our expectations
     and may require development and renovation costs exceeding our estimates


         We intend to continue operating as a full service, integrated real
estate company. These efforts may, under appropriate circumstances, result in
the Company acquiring office and industrial properties. Changing market
conditions, however, including competition from others, may diminish our
opportunities for making attractive acquisitions. Once made, our investments may
fail to perform in accordance with our expectations. The estimated renovation
and improvement costs incurred in bringing an acquired property up to market
standards may exceed our estimates. We anticipate financing future acquisitions
and renovations through a combination of advances under lines of credit and
other forms of secured or unsecured financing. If new developments are financed
through construction loans, there is a risk that, upon completion of
construction, permanent financing for newly developed properties may not be
available or may be available only on disadvantageous terms.

         In addition, we periodically develop, redevelop and construct office
buildings and other commercial properties. Risks associated with these
development, redevelopment and construction activities include:


         o  the unavailability of favorable financing;

         o  the abandonment of such activities prior to completion;

         o  construction costs exceeding original estimates;

         o  construction and lease-up delays resulting in increased debt service
            and construction costs; and

         o  insufficient occupancy rates and rents at a newly completed
            property causing a property to be unprofitable.

o    Our indebtedness subjects us to additional risks

         Debt Financing and Existing Debt Maturities. We are subject to risks
normally associated with debt financing, such as the insufficiency of cash flow
to meet required payment obligations and the inability to refinance existing
indebtedness. If our debt cannot be paid, refinanced or extended at maturity, in
addition to our failure to repay our debt, we may not be able to make
distributions to shareholders at expected levels or at all. Furthermore, if any
refinancing is done at higher interest rates, the increased interest expense
could adversely affect our cash flow and ability to make distributions to
shareholders. If we do not meet our mortgage financing obligations, any
properties securing such indebtedness could be foreclosed on, which would have a
material adverse effect on our cash flow and ability to make distributions and,
depending on the number of properties foreclosed on, could threaten our
continued viability.

         Risk of Rising Interest Rates and Variable Rate Debt. Increases in
interest rates on variable rate indebtedness would increase our interest
expense, which could adversely affect our cash flow and ability to make
distributions to shareholders.

         No Limitation on Debt. Our organizational documents do not contain any
limitation on the Company's debt-to-total market capitalization ratio.
Accordingly, we could increase our leverage without restriction. The increased
debt service could adversely affect our cash flow and ability to make
distributions and could increase the risk of default on our indebtedness.

                                      -13-

<PAGE>

o    Our status as a REIT is dependent on compliance with federal income tax
     requirements

         Our failure to qualify as a REIT would have serious adverse
consequences to our shareholders. We believe that since 1986, we have qualified
for taxation as a REIT for federal income tax purposes. We plan to continue to
meet the requirements for taxation as a REIT. Many of these requirements,
however, are highly technical and complex. The determination that we are a REIT
requires an analysis of various factual matters and circumstances that may not
be totally within our control. For example, to qualify as a REIT, at least 95%
of our gross income must come from certain sources that are itemized in the REIT
tax laws. We are also required to distribute to shareholders at least 95% of our
REIT taxable income (excluding capital gains). The fact that we hold our assets
through the Operating Partnership and its subsidiaries further complicates the
application of the REIT requirements. Even a technical or inadvertent mistake
could jeopardize our REIT status. Furthermore, Congress and the IRS might change
the tax laws and regulations, and the courts might issue new rulings that make
it more difficult, or impossible, for the Company to remain qualified as a REIT.
We do not believe, however, that any pending or proposed tax law changes would
jeopardize our REIT status.

         To maintain REIT status, a REIT may not own more than 10% of the voting
stock of any corporation, except for a qualified REIT subsidiary (which must be
wholly-owned by the REIT) or another REIT. In order to comply with this rule,
the Operating Partnership owns 5% of the voting common stock and all of the
non-voting preferred stock of the Management Company. The Internal Revenue
Service ("IRS"), however, could contend that the Operating Partnership's
ownership of all of the non-voting preferred stock of the Management Company
should be viewed as voting stock because of the Operating Partnership's
substantial economic position in the Management Company. If successful in such a
contention, the Company's status as a REIT would be lost and the Company would
be subject to the consequences summarized below.

         Arthur Andersen LLP, special tax advisor to the Company, has given us
an opinion to the effect that, beginning with our taxable year ended December
31, 1986, we have been organized and have operated in conformity with the
requirements for qualification and taxation as a REIT under the Code for each of
our taxable years and that our current method of organization and operation will
enable us to continue to so qualify. The opinion of Arthur Andersen LLP is based
on assumptions and factual representations made by us regarding our ability to
meet the requirements for qualification as a REIT. Such opinion is not binding
on the IRS or any court. Moreover, Arthur Andersen LLP does not review or
monitor our compliance with the requirements for REIT qualification on an
ongoing basis. We cannot guarantee that we will be qualified and taxed as a
REIT, because our qualification and taxation as a REIT will depend upon our
ability to meet, on an ongoing basis, the requirements imposed under the Code.

         If we fail to qualify as a REIT, we would be subject to federal income
tax at regular corporate rates. Also, unless the IRS granted us relief under
certain statutory provisions, we would remain disqualified as a REIT for four
years following the year we first failed to qualify. If we failed to qualify as
a REIT, we would have to pay significant income taxes and would therefore have
less money available for investments or for distributions to shareholders. This
would likely have a significant adverse affect of the value of our securities.
In addition, we would no longer be required to make any distributions to
shareholders.

         In order to make the distributions required to maintain our REIT
status, we may need to borrow funds. To obtain the favorable tax treatment
associated with REIT qualification, we generally will be required to distribute
to shareholders at least 95% of our annual REIT taxable income (excluding net
capital gain). In addition, we will be subject to tax on our undistributed net
taxable income and net capital gain and a 4% nondeductible excise tax on the
amount, if any, by which certain distributions paid by us with respect to any
calendar year are less than the sum of 85% of our ordinary income plus 95% of
our capital gain net income for the calendar year, plus certain undistributed
amounts from prior years.

                                      -14-
<PAGE>

         We intend to make distributions to shareholders to comply with the
distribution provisions of the Code and to avoid income and other taxes. Our
income will consist primarily of our share of the income of the Operating
Partnership and our cash flow will consist primarily of our share of
distributions from the Operating Partnership. Differences in timing between the
receipt of income and the payment of expenses in arriving at taxable income (of
the Company or the Operating Partnership) and the effect of required debt
amortization payments could require us to borrow funds on a short-term basis or
liquidate funds on adverse terms to meet the REIT qualification distribution
requirements.

         The failure of the Operating Partnership (or a subsidiary partnership)
to be treated as a partnership would have serious adverse consequences to our
shareholders. If the IRS were to successfully challenge the tax status of the
Operating Partnership or any of its subsidiary partnerships for federal income
tax purposes, the Operating Partnership or the affected subsidiary partnership
would be taxable as a corporation. In such event, we would cease to qualify as a
REIT and the imposition of a corporate tax on the Operating Partnership or a
subsidiary partnership would reduce the amount of cash available for
distribution from such partnership to us and our shareholders.

          We do pay some taxes. Even if we qualify as a REIT, we are required to
pay certain federal, state and local taxes on our income and property. In
addition, the Management Company is subject to federal, state and local income
tax at regular corporate rates on its net taxable income derived from its
management, leasing and related service business. If we have net income from a
prohibited transaction, such income will be subject to a 100% tax.

         We own a subsidiary REIT. One of our subsidiaries, Atlantic American
Properties Trust ("AAPT"), that indirectly holds approximately 35 of the
Properties, elected to be taxed as a REIT for the year ended December 31, 1997.
So long as we seek to maintain AAPT's REIT status, AAPT will be subject to all
the requirements and risks associated with maintaining REIT status summarized
above, including the limitation on the ownership of more than 10% of the voting
securities of any corporation (other than a qualified REIT subsidiary or another
REIT). AAPT indirectly owns non-voting common stock issued by a corporation
which is neither a qualified REIT subsidiary nor a REIT.

o    Environmental problems are possible and may be costly

         Federal, state and local laws, ordinances and regulations may require a
current or previous owner or operator of real estate to investigate and clean up
hazardous or toxic substances or releases at such property. The owner or
operator may be forced to pay for property damage and for investigation and
clean-up costs incurred by others in connection with environmental
contamination. Such laws typically impose clean-up responsibility and liability
without regard to whether the owner or operator knew of or caused the presence
of the contaminants. Even if more than one person may have been responsible for
the contamination, each person covered by the environmental laws may be held
responsible for all of the clean-up costs incurred. In addition, third parties
may sue the owner or operator of a site for damages and costs resulting from
environmental contamination emanating from that site. These costs may be
substantial and the presence of such substances may adversely affect the owner's
ability to sell or rent such property or to borrow using such property as
collateral.

         Independent environmental consultants have conducted a standard Phase I
or similar general environmental site assessment ("ESA") of each of our
Properties to identify potential sources of environmental contamination and
assess environmental regulatory compliance. For a number of the Properties, the
Phase I ESA either referenced a prior Phase II ESA obtained on such Property or
prompted us to have a Phase II ESA of such Property conducted. A Phase II ESA
generally involves invasive procedures, such as soil sampling and testing or the
installation and monitoring of groundwater wells. While the ESAs conducted have
identified environmental contamination on a few of the Properties, they have not
revealed any environmental contamination, liability or compliance concern that
we believe would have a material adverse effect on our cash flow or ability to
make distributions to shareholders.

                                      -15-
<PAGE>

         It is possible that the existing ESAs relating to the Properties do not
reveal all environmental contaminations, liabilities or compliance concerns
which currently exist. In addition, future properties which we acquire may be
subject to environmental conditions.

o    Some potential losses are not covered by insurance

         We carry comprehensive liability, fire, extended coverage and rental
loss insurance on all of our Properties. We believe the policy specifications
and insured limits of these policies are adequate and appropriate. There are,
however, certain types of losses, such as lease and other contract claims that
generally are not insured. Should an uninsured loss or a loss in excess of
insured limits occur, we could lose all or a portion of the capital we have
invested in a property, as well as the anticipated future revenue from the
property. In such an event, we might nevertheless remain obligated for any
mortgage debt or other financial obligations related to the property.

o    We do not control the Management Company

          While we own substantially all (95%) of the economic interest in the
Management Company, to maintain our REIT qualification, certain of the executive
officers of the Company indirectly hold 95% of the voting common stock of the
Management Company. Therefore, we do not control the timing or amount of
distributions by, or the management and operation of, the Management Company. As
a result, decisions relating to the payment of distributions by, and the
business policies and operations of, the Management Company could be adverse to
our interests.

o    We are dependent upon our key personnel

         We are dependent upon the efforts of our executive officers,
particularly Anthony A. Nichols, Sr. and Gerard H. Sweeney. The loss of their
services could have an adverse affect on our operations. Although we have
employment agreements with Messrs. Nichols and Sweeney, such agreements do not
restrict their ability to become employed by a competitor following the
termination of their employment with us.

o    Certain limitations exist with respect to a third party's ability to
     acquire us or effectuate a change in control

         Limitations imposed to protect our REIT status. In order to protect us
against loss of our REIT status, our Declaration of Trust limits any shareholder
from owning more than 9.8% in value of our outstanding shares, subject to
certain exceptions. If you or anyone else acquires shares in excess of the
ownership limit, we may:

         o  consider the transfer to be null and void;

         o  not reflect the transaction on our books;

         o  institute legal action to stop the transaction;

         o  not pay dividends or other distributions with respect to those
            shares;

         o  not recognize any voting rights for those shares; and

         o  consider the shares held in trust for the benefit of a person to
            whom such shares may be transferred.

         Limitation due to our ability to issue preferred shares. Our
Declaration of Trust authorizes the Board of Trustees to issue preferred shares.
The Board of Trustees may establish the preferences and rights

                                      -16-
<PAGE>

of any preferred shares issued which could have the effect of delaying or
preventing someone from taking control of us, even if a change in control were
in our shareholders' best interests.

         Limitations imposed by the Business Combination Law. The Maryland
General Corporation Law (the "MGCL"), as applicable to Maryland real estate
investment trusts, establishes special restrictions against "business
combinations" between a Maryland real estate investment trust and "interested
shareholders" or their affiliates unless an exemption is applicable. An
interested shareholder includes a person who beneficially owns, and an affiliate
or associate of the trust who, at any time within the two-year period prior to
the date in question, was the beneficial owner of, ten percent or more of the
voting power of our then-outstanding voting shares. Among other things, the law
prohibits (for a period of five years) a merger and certain other transactions
between the trust and an interested shareholder unless the board of trustees
approved the transaction before the party became an interested shareholder. The
five-year period runs from the most recent date on which the interested
shareholder became an interested shareholder. Thereafter, any such business
combination must be recommended by the board of trustees and approved by two
super-majority shareholder votes unless, among other conditions, the trust's
common shareholders receive a minimum price for their shares and the
consideration is received in cash or in the same form as previously paid by the
interested shareholder for its shares or unless the board of trustees approved
the transaction before the party in question became an interested shareholder.
The business combination statute could have the effect of discouraging offers to
acquire us and of increasing the difficulty of consummating any such offers,
even if our acquisition would be in our shareholders' best interests.

         We have exempted any business combination involving Safeguard
Scientific, Inc. ("SSI"), The Nichols Company ("TNC"), the Commonwealth of
Pennsylvania State Employees' Retirement System ("SERS") and a voting trust
established for its benefit (the "SERS Voting Trust"), Morgan Stanley Asset
Management Inc. and two funds (the "Morgan Stanley Funds") managed by it, Lazard
Freres Real Estate Investors, L.L.C. ("Lazard"), Gerard H. Sweeney (the
Company's President and Chief Executive Officer) and any of their respective
affiliates or associates.

         Limitations imposed by the Maryland Control Share Statute. The Maryland
General Corporation Law provides that "control shares" of a Maryland real estate
investment trust acquired in a "control share acquisition" have no voting rights
except to the extent approved by a vote of two-thirds of the votes entitled to
be cast on the matter, excluding shares of beneficial interest owned by the
acquiror, by officers or by trustees who are employees of the trust. If voting
rights are not approved at a meeting of shareholders or if the acquiring person
does not deliver an acquiring person statement as required by the statute, then,
subject to certain conditions and limitations, the trust may redeem any or all
of the control shares (except those for which voting rights have previously been
approved) for fair value. If voting rights for control shares are approved at a
shareholders meeting and the acquiror becomes entitled to vote a majority of the
shares entitled to vote, all other shareholders may exercise appraisal rights.
The control share statute could have the effect of discouraging offers to
acquire us and of increasing the difficulty of consummating any such offers,
even if our acquisition would be in our shareholders' best interests.

         We have exempted acquisitions by SSI, TNC, SERS, the SERS Voting Trust,
Morgan Stanley Asset Management Inc., the Morgan Stanley Funds and any current
or future affiliates or associates of theirs from the control shares statute. As
a result, these entities will be able to possess voting power not generally
available to other persons.

o    The issuance of preferred shares may adversely affect the rights of holders
     of Common Shares

         Because the Board of Trustees has the power to establish the
preferences and rights of each class or series of preferred shares, it may
afford the holders in any series or class of preferred shares preferences,
distributions, powers and rights, voting or otherwise, senior to the rights of
holders of Common Shares.

                                      -17-
<PAGE>

Item 2.  Properties

Properties

         As of December 31, 1998, the Company owned a portfolio of 201 office
properties, 70 industrial facilities and one mixed-use property that contained
an aggregate of approximately 18.8 million net rentable square feet. As of
December 31, 1998, 183 of the Properties (approximately 62.8% of the Company's
portfolio based on net rentable square feet) were located in the Suburban
Philadelphia Office and Industrial Market. As of December 31, 1998, the
Properties (excluding two Properties under development or redevelopment) were
approximately 93.6% leased to 1,357 tenants. The office Properties are primarily
one to three story suburban office buildings containing an average of
approximately 72,000 net rentable square feet. The industrial Properties
accommodate a variety of tenant uses including light manufacturing, assembly,
distribution and warehousing. The Company carries comprehensive liability, fire,
extended coverage and rental loss insurance covering all of the Properties, with
policy specifications and insured limits which the Company believes are
adequate.






























                                      -18-
<PAGE>

         The following table sets forth certain information with respect to the
Properties at December 31, 1998:

<TABLE>
<CAPTION>
                                                                                        Net       Percentage 
                                                                                     Rentable    Leased as of
                                                                         Year         Square      December   
        Property Name                      Location         State        Built         Feet      31, 1998 (a)
- - ----------------------------------        ---------         -----       ------       --------    ------------
<S>                                       <C>               <C>         <C>          <C>             <C>    
   600 East Main Street                    Richmond           VA         1986         423,062         63.2%  
                                                                                                             
                                                                                                             
   100-300 Gundy Drive                     Reading            PA         1970         416,830         99.9%  
                                                                                                             
                                                                                                             
   301 North Walnut Street                Wilmington          DE         1989         321,511        100.0%  
                                                                                                             
                                                                                                             
   201 North Walnut Street                Wilmington          DE         1988         311,286        100.0%  
                                                                                                             
                                                                                                             
   50 East State Street                    Trenton            NJ         1989         305,699         93.6%  
                                                                                                             
   Park 80 West Plaza II                 Saddlebrook          NJ         1988         266,173         87.5%  
                                                                                                             
                                                                                                             
   Park 80 West Plaza I                  Saddlebrook          NJ         1970         217,016         98.8%  
                                                                                                             
   Arboretum III                           Richmond           VA         1988         214,282         98.6%  
                                                                                                             
   Masons Mill                            Bryn Mawr           PA         1984         211,753         48.5%  
                                                                                                             
   Bowman Plains Industrial Park          Frederick           MD         1998         208,774        100.0%  
                                                                                                             
   1970 Chainbridge Road                    Vienna            VA         1982         203,084        100.0%  
                                                                                                             
                                                                                                             
   1009 Lenox Drive                     Lawrenceville         NJ         1989         183,342         94.6%  
                                                                                                             
                                                                                                             
   256-263 Chapman Road (d)                 Newark            DE         1983         181,607         90.4%  
                                                                                                             
   1200 Highland Drive                   Westhampton          NJ         1998         181,127         44.0%  
                                                                                                             
   10000 Midlantic Drive                  Mt. Laurel          NJ         1990         175,573         95.8%  
                                                                                                             
                                                                                                             
   300 Corporate Center Drive             Camp Hill           PA         1989         175,289        100.0%  
                                                                                                             
                                                                                                             
   111 Presidential Boulevard            Bala Cynwyd          PA         1997         173,079         89.9%  
                                                                                                             
   1880 Campus Commons Drive                Reston            VA         1985         172,448        100.0%  
                                                                                                             
   33 West State Street                    Trenton            NJ         1988         168,216         99.7%  
                                                                                                             
   Philadelphia Marine Center (g)        Philadelphia         PA       Various        167,760        100.0%  
                                                                                                             
                                                                                                             
   3329 Street Road -Greenwood Square      Bensalem           PA         1985         165,929         99.4%  
   3331 Street Road -Greenwood Square      Bensalem           PA         1986               - (e)        -  
   3333 Street Road -Greenwood Square      Bensalem           PA         1988               - (e)        -  
                                                                                                             
   Main Street - Plaza 1000                Voorhees           NJ         1988         162,364         99.7%  
                                                                                                             
                                                                                                             
                                                                                                             
   751-761 Fifth Avenue                King Of Prussia        PA         1967         158,000        100.0%  
                                                                                                             
   7055 Ambassador Drive                  Allentown           PA         1991         153,600        100.0%  
                                                                                                             
   1510 Gehman Road                        Lansdale           PA         1990         152,625        100.0%  
                                                                                                             
                                                                                                             
   Greenwood Center                        Fairfax            VA         1985         150,358         99.1%  
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
   55 U.S. Avenue                         Gibbsboro           NJ         1982         138,700         59.1%  
                                                                                                             
   100 Katchel Blvd                        Reading            PA         1970         133,424         98.2%  
                                                                                                             
                                                                                                             
   2511 Brittons Hill Road                 Richmond           VA         1987         132,103         90.4%  
                                                                                                             
                                                                                                             
                                                                                                             
   640 Freedom Business Center (g)     King Of Prussia        PA         1991         132,000        100.0%  
                                                                                                             
   52 Swedesford Square               East Whiteland Twp.     PA         1988         131,017        100.0%  
                                                                                                             
                                                                                                             
                                                                                                             
   1760 Market Square                    Philadelphia         PA         1981         130,416         91.4%  
                                                                                                             
   Oakwood Center                          Fairfax            VA         1985         128,383         99.4%  
                                                                                                             
                                                                                                             
   7535 Windsor Drive                     Allentown           PA         1988         128,351         98.1%  
                                                                                                             
                                                                                                             
                                                                                                             
   500 Highland Drive                    Westhampton          NJ         1990         127,340        100.0%  
                                                                                                             
   2100-2108 West Laburnam                 Richmond           VA         1976         127,327         82.4%  
                                                                                                             
   300 Highland Drive                    Westhampton          NJ         1990         126,905        100.0%  
</TABLE>
<PAGE>

(RESTUBBED TABLE)

<TABLE>
<CAPTION>
                                                           Average                Tenants Leasing 10%
                                        Total Base Rent   Annualized              or More of Rentable
                                        for the Twelve    Rental Rate             Square Footage per
                                         Months Ended       as of                   Property as of
                                          December 31,     December              December 31, 1998 and
        Property Name                   1998 (b) (000's)  31, 1998 (c)            Lease Expiration Date
- - --------------------------------------  ----------------  ------------   ----------------------------------------------------
<S>                                      <C>               <C>             <C>  
   600 East Main Street                       1,869          23.79        Bell Atlantic VA (20%) - 11/03
                                                                          Nations Bank (19%) - 6/00
                                                                        
   100-300 Gundy Drive                        6,376          15.04        Parsons Corporation (48%) - 3/5
                                                                          Penske Truck Leasing (32%) - 12/05
                                                                        
   301 North Walnut Street                    3,568          17.00        Beneficial Corporation (76%) - 12/10
                                                                          First USA Bank (17%) - 6/10
                                                                        
   201 North Walnut Street                    4,160          18.88        First USA Bank (88%) - 1/12
                                                                        
                                                                        
   50 East State Street                       3,848          22.27        State of N.J. Dept. of Human Services (73%) - 9/09
                                                                        
   Park 80 West Plaza II                      5,209          22.68        Vornado Realty Trust (12%) - 4/02
                                                                          Lexington Management Corp. (10%) - 8/03
                                                                        
   Park 80 West Plaza I                       4,276          22.03        New York Life Insurance Co. (12%) - 10/04
                                                                        
   Arboretum III                                869          15.68        The Travelers (61%) - 1/00 & 1/04
                                                                        
   Masons Mill                                  507          14.37      
                                                                        
   Bowman Plains Industrial Park                 94           5.50        GE Capital, Inc. (100%) - 12/07
                                                                        
   1970 Chainbridge Road                      1,097          22.58        GRC International (82%) - 5/09
                                                                        
                                                                        
   1009 Lenox Drive                           2,417          22.68        N.J. State Medical Underwriters (15%) - 5/01
                                                                          Uniform Code Council, Inc. (11%) - 10/08
                                                                        
   256-263 Chapman Road (d)                   2,127          13.44        Delaware Dept. of Admin Services (28%) - 10/99 - 9/02
                                                                        
   1200 Highland Drive                           64           3.95        International Paper (44%) - 10/08
                                                                        
   10000 Midlantic Drive                      2,535          21.29        QAD, Inc. (37%) - 8/01
                                                                          Deutsche Financial Services (13%) - 1/00
                                                                        
   300 Corporate Center Drive                 2,069          18.22        International Business Machines (83%) - 8/99
                                                                          Medical Services Associates (17%) - 5/99
                                                                        
   111 Presidential Boulevard                 3,770          24.58        American Business Financial (36%) - 7/03
                                                                        
   1880 Campus Commons Drive                    594          13.25        Bell Atlantic Video Systems (100%) - 4/01
                                                                        
   33 West State Street                       2,236          25.07        The State of New Jersey (95%) - 7/00 & 8/08
                                                                        
   Philadelphia Marine Center (g)               220           4.35        Dave & Busters of Pennsylvania, Inc. (88%) - 2/14
                                                                          Meiji-En Restaurant (11%) - 12/00
                                                                        
   3329 Street Road -Greenwood Square         2,561          16.77        Nextell Communications (18%) - 7/02
   3331 Street Road -Greenwood Square          (e)            (e)         FPA Corporation (10%) - 12/01
   3333 Street Road -Greenwood Square          (e)            (e)            
                                                                        
   Main Street - Plaza 1000                   2,814          18.45        Credit Lenders (13%) - 12/01
                                                                          Dean Witter (11%) - 9/04
                                                                          AMC (10%) - 12/99
                                                                        
   751-761 Fifth Avenue                         421           3.10        Lockheed Martin Corp. (100%) - 9/02
                                                                        
   7055 Ambassador Drive                        160           4.72        Catepillar Logist (100%) - 12/00
                                                                        
   1510 Gehman Road                             719           8.12        Accupac, Inc. (65%) - 1/01
                                                                          SKF, USA, Inc. (35%) - 6/08
                                                                        
   Greenwood Center                             803          19.70        Mantech (35%) - 5/07
                                                                          Logicon Geodynamic (13%) - 6/07
                                                                          Aerotek (13%) - 7/03
                                                                          Walcoff & Associates (13%) - 5/00
                                                                        
   55 U.S. Avenue                               574           7.00        Micro Warehouse, Inc. (59%) - 8/02
                                                                        
   100 Katchel Blvd                           2,757          20.32        Penske Truck Leasing (56%) - 12/05
                                                                          UGI Utilities, Inc. (33%) - 3/03
                                                                        
   2511 Brittons Hill Road                      137           3.70        Circuit City Stores, Inc. (44%) - 6/00
                                                                          Colortree, Inc. (34%) - 7/02
                                                                          Lucent Technologies, Inc. (12%) - 12/98
                                                                        
   640 Freedom Business Center (g)            2,122          19.53        General Electric Company (100%) - 9/01
                                                                        
   52 Swedesford Square                         513          19.07        Bell Atlantic (38%) - 7/00
                                                                          The Vanguard Group (35%) - 7/06
                                                                          Decision One Corporation (27%) - 6/03
                                                                        
   1760 Market Square                           602          19.81      
                                                                        
   Oakwood Center                               733          16.24        Versatility (31%) - 12/04
                                                                          Logicon Geodynamic (27%) - 6/00 & 6/07
                                                                        
   7535 Windsor Drive                           432          15.04        Air Products (47%) - 11/01
                                                                          Cadence Design Systems, Inc. (16%) - 11/01
                                                                          Rosenbluth International (14%) - 4/99
                                                                        
   500 Highland Drive                           484           4.83        PFS - Pepsico (100%) - 12/99
                                                                        
   2100-2108 West Laburnam                      425          14.81        Chesapeake Packaging Corp. (12%) -12/00
                                                                        
   300 Highland Drive                           523           4.50        Walpole (40%) - 10/02
                                                                          U.S. Postal Service (32%) - 4/09
                                                                          Griffis Trucking, Inc. (16%) - 9/99
                                                                          Fautless Casters (12%) - 5/00
</TABLE>
                                      -19-
<PAGE>

<TABLE>
<CAPTION>
                                                                                        Net       Percentage  
                                                                                     Rentable    Leased as of 
                                                                         Year         Square      December    
        Property Name                      Location         State        Built         Feet      31, 1998 (a) 
- - --------------------------------      -----------------     -----       ------        -------    ------------ 
<S>                                    <C>                  <C>         <C>          <C>            <C>      
   6755 Snowdrift Way                     Allentown           PA         1988         125,000        100.0%   
                                                                                                              
   201/221 King Manor Drive            King Of Prussia        PA         1964         124,960        100.0%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   1957 Westmoreland Street                Richmond           VA         1975         121,815        100.0%   
                                                                                                              
   457 Haddonfield Road                  Cherry Hill          NJ         1990         121,737         85.5%   
                                                                                                              
                                                                                                              
                                                                                                              
   2000 Midlantic Drive                   Mt. Laurel          NJ         1989         121,658         97.9%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   700 East Gate Drive                    Mt. Laurel          NJ         1984         121,114         97.6%   
                                                                                                              
                                                                                                              
                                                                                                              
   100 West Road                            Towson            MD         1988         120,234         92.5%   
                                                                                                              
                                                                                                              
   4667 Somerton Road (d)                  Trevose            PA         1974         118,000         83.1%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   7000 Geerdes Boulevard              King Of Prussia        PA         1988         112,905        100.0%   
                                                                                                              
   7350 Tilghman Street                   Allentown           PA         1987         111,500         82.0%   
                                                                                                              
   993 Lenox Drive                      Lawrenceville         NJ         1985         111,137         92.3%   
                                                                                                              
                                                                                                              
                                                                                                              
   501 Office Center Drive             Fort Washington        PA         1974         110,514         94.2%   
                                                                                                              
   50 Swedesford Square               East Whiteland Twp.     PA         1986         109,800        100.0%   
                                                                                                              
   300 Berwyn Park                          Berwyn            PA         1989         107,919        100.0%   
                                                                                                              
                                                                                                              
                                                                                                              
   1111 Old Eagle School Road            Valley Forge         PA         1962         107,000        100.0%   
                                                                                                              
   640-660 Allendale Road              King Of Prussia        PA         1962         106,635        100.0%   
                                                                                                              
   1000 Howard Boulevard                  Mt. Laurel          NJ         1988         105,312         99.6%   
                                                                                                              
                                                                                                              
   4550 New Linden Hill Road              Wilmington          DE         1974         105,000         98.5%   
                                                                                                              
                                                                                                              
   One Righter Parkway (g)               Talleyville          DE         1989         104,828        100.0%   
                                                                                                              
                                                                                                              
   920 Harvest Drive                      Blue Bell           PA         1990         104,505        100.0%   
                                                                                                              
   500 Office Center Drive             Fort Washington        PA         1974         100,447         37.7%   
                                                                                                              
   7450 Tilghman Street                   Allentown           PA         1986         100,000         69.3%   
                                                                                                              
   One South Union Place                 Cherry Hill          NJ         1982          99,573        100.0%   
                                                                                                              
   997 Lenox Drive                      Lawrenceville         NJ         1987          97,277         96.2%   
                                                                                                              
                                                                                                              
                                                                                                              
   1000 Atrium Way                        Mt. Laurel          NJ         1989          96,660         94.3%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   EM - Venture II - Keystone Park         Bristol            PA         1985          96,000        100.0%   
                                                                                                              
   1120 Executive Boulevard                Marlton            NJ         1987          95,124         98.1%   
                                                                                                              
                                                                                                              
   3 Paragon Drive (f)                     Montvale           NJ         1988          93,060          0.0%   
                                                                                                              
   6845 Snowdrift Way                     Allentown           PA         1975          93,000        100.0%   
                                                                                                              
                                                                                                              
   500 North Gulph Road                King Of Prussia        PA         1979          92,851         99.9%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   55 Ames Court                          Plainview           NY         1961          90,000         58.5%   
</TABLE>
<PAGE>

(RESTUBBED TABLE)

<TABLE>
<CAPTION>
                                                       Average                Tenants Leasing 10%
                                    Total Base Rent   Annualized              or More of Rentable
                                    for the Twelve    Rental Rate             Square Footage per
                                     Months Ended       as of                   Property as of
                                      December 31,     December              December 31, 1998 and
        Property Name               1998 (b) (000's)  31, 1998 (c)            Lease Expiration Date
- - ----------------------------------- ----------------  ------------   ----------------------------------------------------
<S>                                         <C>           <C>         <C> 
   6755 Snowdrift Way                       126           4.72        Day Timers , Inc. (100%) - 2/00
                                                                    
   201/221 King Manor Drive                 493           5.00        Reber - Friel Company (28%) - 6/01
                                                                      Country Fresh Batter (28%) - 6/03
                                                                      Central Sprinkler (16%) - 4/99
                                                                      Dillon Moving, Inc. (13%) - 6/99
                                                                    
   1957 Westmoreland Street                 152           4.05        Capital One Bank (100%) - 1/00
                                                                    
   457 Haddonfield Road                   1,797          21.19        PHP Healthcare Corporation (31%) - 1/08
                                                                      Montgomery McCracken (13%) - 2/05
                                                                      Dilworth, Paxson (10%) - 5/04
                                                                    
   2000 Midlantic Drive                   1,447          17.31        Lockheed Martin Corporation (47%) - 5/99, 6/02,10/04
                                                                      Computer Associates International (26%) - 12/02
                                                                      Axiom, Inc. (13%) - 4/08
                                                                      Moore Business Forms (12%) - 4/00
                                                                    
   700 East Gate Drive                      546          18.35        Copelco (47%) - 3/05
                                                                      HBO & Company (21%) - 8/99
                                                                      LMC Properties (13%) - 5/00
                                                                    
   100 West Road                          2,152          20.29        Towson Telephone (13%) - 8/99
                                                                      Atlantic Federal Savings Bank (12%) - 11/99
                                                                    
   4667 Somerton Road (d)                 1,869           5.89        American Home Patient, Inc. (17%) - 10/99
                                                                      BVI Industries, Inc. (17%) - 12/00
                                                                      Brownell Electro, Inc. (14%) - 6/99
                                                                      Carpet Transport, Inc. (14%) - 9/99
                                                                      A.P. Green Refractories Co. (13%) - 12/01
                                                                    
   7000 Geerdes Boulevard                 1,460          13.15        Martin Marietta Corp. (100%) - 12/98
                                                                    
   7350 Tilghman Street                     420          16.25        The Hartford Group (82%) - 5/99 & 12/07
                                                                    
   993 Lenox Drive                        1,698          19.71        Stark & Stark, Inc. (57%) - 8/04
                                                                      Office Concierge, Inc. (18%) - 4/04
                                                                      Peterson Consulting, LLC (12%) - 6/00
                                                                    
   501 Office Center Drive                1,014          17.89      
                                                                    
   50 Swedesford Square                     490          15.83        Decision One Corporation (100%) - 12/05
                                                                    
   300 Berwyn Park                        1,987          20.89        Delaware Valley Financial (53%) - 1/00 and 3/04
                                                                      Vertex Incorporated (12%) - 12/98
                                                                      G.G.I. Systems, Inc. (11%) - 8/99 and 4/04
                                                                    
   1111 Old Eagle School Road             1,017           9.50        PECO (100%) - 6/00
                                                                    
   640-660 Allendale Road                   395           4.34        Telespectrum Worldwide, Inc. (100%) - 8/02
                                                                    
   1000 Howard Boulevard                  2,226          21.85        Conrail (66%) - 6/10
                                                                      Lincoln Technical Institute (25%) - 11/09
                                                                    
   4550 New Linden Hill Road              1,550          15.25        Associates Credit Card Services (51%) - 5/99
                                                                      The Whitaker Corporation (23%) - 8/02
                                                                    
   One Righter Parkway (g)                2,280          20.77        Kimberly Clark (89 %) - 12/05
                                                                      Zeneca, Inc. (10%) -12/05
                                                                    
   920 Harvest Drive                      1,286          16.63        Aetna Life Insurance (100%) - 6/02
                                                                    
   500 Office Center Drive                  930          18.68        Access Services, Inc. (10%) - 8/03
                                                                    
   7450 Tilghman Street                     352          16.24        The Hartford Group (67%) - 12/07
                                                                    
   One South Union Place                    565          12.05        Vlasic Foods International, Inc. (100%) - 7/08
                                                                    
   997 Lenox Drive                        1,432          20.60        Fox,Rothschild,O'Brien & Frankel (34%) - 10/01 & 6/03
                                                                      Dechert Price & Rhoads (25%) - 11/03
                                                                      Smith Barney, Inc. (10%) - 9/05
                                                                    
   1000 Atrium Way                        1,547          18.14        IBM (18%) - 3/01
                                                                      Navistar Financial (17%) - 12/99
                                                                      Corporate Dynamics (14%) - 2/04
                                                                      Tri - Star Finance (12%) - 10/02
                                                                      Janney, Montgomery, Scott (12%) - 9/02
                                                                    
   EM - Venture II - Keystone Park          171           8.00        Jones Apparel Group, Inc. (100%) - 7/13
                                                                    
   1120 Executive Boulevard               1,220          19.68        Computer Sciences Corporation (63%) - 5/02 & 8/03
                                                                      Fleercorp (19%) - 4/00
                                                                    
   3 Paragon Drive (f)                                                  
                                                                    
   6845 Snowdrift Way                       104           5.02        Rodale Press, Inc. (55%) - 8/02
                                                                      BMG Music (45%) - 2/03
                                                                    
   500 North Gulph Road                   1,648          18.27        Transition Software (16%) - 9/00
                                                                      Nason Cullen Group (15%) - 8/01
                                                                      Strohl Systems (12%) - 10/99
                                                                      Ford Motor Credit Corp. (10%) - 10/04
                                                                    
   55 Ames Court                            201          14.96        Berman Blake Associates (59%) - 6/02
</TABLE>

                                      -20-
<PAGE>

<TABLE>
<CAPTION>
                                                                                                              
                                                                                                              
                                                                                        Net       Percentage  
                                                                                     Rentable    Leased as of 
                                                                         Year         Square      December    
        Property Name                      Location         State        Built         Feet      31, 1998 (a) 
- - -----------------------------------    ----------------     -----       ------        -------    ------------ 
<S>                                    <C>                  <C>         <C>           <C>         <C>         
   6690 Grant Way                         Allentown           PA         1982          88,000        100.0%   
                                                                                                              
                                                                                                              
   620 Freedom Business Center (g)     King Of Prussia        PA         1986          86,559        100.0%   
                                                                                                              
                                                                                                              
   630 Freedom Business Center (g)     King Of Prussia        PA         1989          86,291         99.8%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   Dabney X                                Richmond           VA         1989          85,844        100.0%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   105 Terry Drive                         Newtown            PA         1982          84,730         94.2%   
                                                                                                              
                                                                                                              
                                                                                                              
   15000 Midlantic Drive                  Mt. Laurel          NJ         1991          84,056        100.0%   
                                                                                                              
                                                                                                              
   245 Old Country Road                    Melville           NY         1978          82,308        100.0%   
                                                                                                              
   700 Business Center Drive (b)           Horsham            PA         1986          82,009         93.4%   
   800 Business Center Drive (b)           Horsham            PA         1986              --          0.0%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   2595 Metropolitan Drive (d)             Trevose            PA         1981          80,000        100.0%   
                                                                                                              
   One Progress Avenue                     Horsham            PA         1986          79,204        100.0%   
                                                                                                              
   323 Norristown Road                   Lower Gwyned         PA         1988          79,083        100.0%   
                                                                                                              
                                                                                                              
   180 Wheeler Court                      Langhorne           PA         1975          78,213        100.0%   
                                                                                                              
                                                                                                              
   1007 Laurel Oak Road                    Voorhees           NJ         1996          78,205        100.0%   
                                                                                                              
   Maschellmac IV (g)                  King Of Prussia        PA         1987          77,718         94.4%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   741 First Avenue                    King Of Prussia        PA         1966          77,184        100.0%   
                                                                                                              
   200 Berwyn Park                          Berwyn            PA         1987          76,065         96.3%   
                                                                                                              
                                                                                                              
                                                                                                              
   Maschellmac III (g)                 King Of Prussia        PA         1985          75,488        100.0%   
                                                                                                              
                                                                                                              
   Maschellmac II (g)                  King Of Prussia        PA         1984          74,556        100.0%   
                                                                                                              
   Maschellmac I (g)                   King Of Prussia        PA         1980          74,140         92.8%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   160 - 180 West Germantown Pike       East Norriton         PA         1982          73,750        100.0%   
                                                                                                              
   5910 -6090 Six Forks                    Raleigh            NC         1982          73,415        100.0%   
                                                                                                              
   Arboretum VI                            Richmond           VA         1991          73,195         97.4%   
                                                                                                              
   6670 Grant Way                         Allentown           PA         1979          72,885        100.0%   
                                                                                                              
   780 Third Avenue                    King Of Prussia        PA         1967          72,000         83.3%   
                                                                                                              
   91 North Industry Court                Deer Park           NY         1965          71,000        100.0%   
                                                                                                              
   2560 Metropolitan Drive                 Trevose            PA         1983          70,000         99.9%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   Three Greentree Centre                  Marlton            NJ         1984          69,101         93.8%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   14 Campus Boulevard                  Newtown Square        PA         1998          69,000         87.0%   
                                                                                                              
                                                                                                              
                                                                                                              
   1105 Berkshire Boulevard                Reading            PA         1987          68,984         93.8%   
                                                                                                              
                                                                                                              
   400 Highland Drive                    Westhampton          NJ         1990          68,660        100.0%   
                                                                                                              
   500 Enterprise Road                     Horsham            PA         1990          67,800         98.5%   
                                                                                                              
                                                                                                              
   9000 Midlantic Drive                   Mt. Laurel          NJ         1989          67,299        100.0%   
</TABLE>
<PAGE>


<TABLE>
<CAPTION>
                                                          Average                Tenants Leasing 10%
                                       Total Base Rent   Annualized              or More of Rentable
                                       for the Twelve    Rental Rate             Square Footage per
                                        Months Ended       as of                   Property as of
                                         December 31,     December              December 31, 1998 and
        Property Name                  1998 (b) (000's)  31, 1998 (c)            Lease Expiration Date
- - -----------------------------------    ----------------  ------------   ----------------------------------------------------
<S>                                     <C>              <C>             <C>
   6690 Grant Way                              103           5.47        AJ Oster  Company (52%) - 12/99
                                                                         Batesville Casket (48%) - 4/99
                                                                       
   620 Freedom Business Center (g)           1,833          21.07        Reliance Insurance Company (80%) - 10/02
                                                                         Sun Microsystems, Inc. (18%) - 2/01
                                                                       
   630 Freedom Business Center (g)           1,612          21.57        Eastern Telelogic Corporation (24%) - 12/00
                                                                         HQ King of Prussia, Inc. (17%) - 7/04
                                                                         Proctor & Gamble Distributing Co. (12%) - 9/99
                                                                         Garden State Tanning, Inc. (10%) - 10/99
                                                                       
   Dabney X                                    135           6.77        Earth Tech (35%) - 3/04
                                                                         CMS Automation (20%) - 1/99
                                                                         Contract Specifix (15%) - 8/99
                                                                         Micro View (14%) -2/01
                                                                       
   105 Terry Drive                           1,276          13.46        Media Management Services, Inc. (22%) - 8/99
                                                                         Parmaceutical Marketing Services (20%) - 10/00
                                                                         Medco
                                                                       
   15000 Midlantic Drive                     1,329          17.91        New Jersey Bell Telephone (89%) - 7/06
                                                                         Gallagher Bassett Services, Inc. (11%) - 11/02
                                                                       
   245 Old Country Road                        137           6.95        Citicorp Custom Credit, Inc. (100%) - 1/11
                                                                       
   700 Business Center Drive (b)             1,172          15.28        Metpath (35%) - 1/12
   800 Business Center Drive (b)                --           0.00        Macro (19%) - 4/01
                                                                         KWS & P (17%) - 4/02
                                                                         Arrow Electronics (13%) - 8/01
                                                                         Fleet Credit Card (10%) - 6/99
                                                                       
   2595 Metropolitan Drive (d)                  --           0.00        Northtec LLC (100 %) - 6/06
                                                                       
   One Progress Avenue                         782           9.80        Reed Technology (100%) - 6/11
                                                                       
   323 Norristown Road                       1,418          16.92        Bisys Plan Services (62%) - 7/02
                                                                         Siemans Energy (20%) - 1/01
                                                                       
   180 Wheeler Court                           237           4.50        Lainiere De Picardie, Inc. (59%) - 12/01
                                                                         West Coast Entertainment Corp. (41%) - 8/00
                                                                       
   1007 Laurel Oak Road                        621           7.94        R.F. Power Products, Inc. (100%) - 10/06
                                                                       
   Maschellmac IV (g)                          386          19.18        Finova Capital (30%) - 1/04
                                                                         Centeon Management (27%) - 10/02
                                                                         Apogee, Inc. (24%) - 8/00
                                                                         Artemis Management (11%) - 5/01
                                                                       
   741 First Avenue                            465           7.75        Tozour - Trane, Incorporated (100%) - 4/05
                                                                       
   200 Berwyn Park                           1,532          23.69        Devon Direct Marketing & Advertising (52%) - 12/01 and 4/02
                                                                         VHA East Corporation (14%) - 11/99
                                                                         Bucks Consultants (12%) - 8/01
                                                                       
   Maschellmac III (g)                        367           18.08        The Travelers (64%) - 2/99
                                                                         Cortech Consulting (36%) - 9/01 and 6/04
                                                                       
   Maschellmac II (g)                          348          17.38        Centeon Management (100%) - 10/02
                                                                       
   Maschellmac I (g)                           418          22.29        First USA, Incorporated (27%) - 9/02
                                                                         Elf Atochem (22%) - 3/06
                                                                         Centeon Mangement (21%) - 1/03
                                                                         Finova Capital (13%) - 1/04
                                                                       
   160 - 180 West Germantown Pike              907          15.99      
                                                                       
   5910 -6090 Six Forks                      1,081          15.56      
                                                                       
   Arboretum VI                                427          16.41        Primeco Personal Communications (24%) - 7/05
                                                                       
   6670 Grant Way                               76           4.62        The Resource Group (100%) - 1/05
                                                                       
   780 Third Avenue                            188           4.20        Telespectrum Worldwide, Inc. (83%) - 12/98
                                                                       
   91 North Industry Court                      71           5.30        Windowrama Warehousing, Inc. (100%)
                                                                       
   2560 Metropolitan Drive                      --           0.00        Picker International (48%) - 9/02
                                                                         Delta Lighting Products, Inc. (19%) - 5/01
                                                                         Nextel Communications (18%) - 3/03
                                                                         Precicontact, Inc. (15%) - 12/99
                                                                       
   Three Greentree Centre                    1,017          17.31        Parker McCay (43%) - 5/01
                                                                         Surety Title Company (15%) - 12/03
                                                                         National City Mortgage Company (12%) - 12%) - 7/00
                                                                         Olde Discount (12%) - 3/00
                                                                       
   14 Campus Boulevard                         158          19.64        Catholic Health East (37%) - 9/08
                                                                         Brandywine Realty Trust (28%) - 10/03
                                                                         Naviant Technology Solutions, Inc. (22%) - 9/08
                                                                       
   1105 Berkshire Boulevard                    897          13.57        The Travelers Indemnity Company (68%) - 2/02
                                                                         Spicer Systems (14%) - 11/01
                                                                       
   400 Highland Drive                          216           3.00        MBO Binder & Company (100%) - 1/02
                                                                       
   500 Enterprise Road                         718          14.44        Conti Mortgage (80%) - 4/01
                                                                         Pioneer Technologies (19%) - 10/00
                                                                       
   9000 Midlantic Drive                        684          18.08        Automotive Rentals (100%) - 8/00
</TABLE>
                                      -21-
<PAGE>

<TABLE>
<CAPTION>
                                                                                                               
                                                                                                               
                                                                                         Net       Percentage  
                                                                                      Rentable    Leased as of 
                                                                          Year         Square      December    
        Property Name                       Location         State        Built         Feet      31, 1998 (a) 
- - --------------------------------------   --------------      -----       ------        -------    ------------ 
<S>                                      <C>                 <C>        <C>           <C>            <C>       
   104 Windsor Center Drive              East Windsor         NJ         1987          66,855         76.5%    
                                                                                                               
                                                                                                               
   6 East Clementon Road                  Gibbsboro           NJ         1980          66,236         93.9%    
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
   600 Highland Drive                    Westhampton          NJ         1990          65,862         82.5%    
                                                                                                               
                                                                                                               
                                                                                                               
   16 Campus Boulevard                  Newtown Square        PA         1990          65,463        100.0%    
                                                                                                               
                                                                                                               
   King & Harvard (f)                    Cherry Hill          NJ         1974          65,223         13.6%    
                                                                                                               
   100 Commerce Drive                       Newark            DE         1989          63,898         99.2%    
                                                                                                               
                                                                                                               
   925 Harvest Drive                      Blue Bell           PA         1990          63,556        100.0%    
                                                                                                               
   610 Freedom Business Center (g)     King Of Prussia        PA         1985          63,031         96.9%    
                                                                                                               
                                                                                                               
                                                                                                               
   1974 Sproul Road                        Broomall           PA         1995          62,934         99.6%    
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
   2200 Cabot Boulevard                   Langhorne           PA         1979          62,481         98.5%    
                                                                                                               
                                                                                                               
                                                                                                               
   4805 Lake Brooke Drive                 Glen Allen          VA         1996          61,632        100.0%    
                                                                                                               
                                                                                                               
                                                                                                               
   701 East Gate Drive                    Mt. Laurel          NJ         1986          61,434         98.0%    
                                                                                                               
                                                                                                               
                                                                                                               
   426 Lancaster Avenue                     Devon             PA         1990          61,102        100.0%    
                                                                                                               
   321 Norristown Road                   Lower Gwyned         PA         1988          60,384         87.9%    
                                                                                                               
                                                                                                               
                                                                                                               
   4000/5000 West Lincoln Drive            Marlton            NJ         1982          60,010         95.8%    
                                                                                                               
   1000/2000 West Lincoln Drive            Marlton            NJ         1982          60,001         98.3%    
                                                                                                               
                                                                                                               
   200 Corporate Center Drive             Camp Hill           PA         1989          60,000        100.0%    
                                                                                                               
   2575 Metropolitan Drive (d)             Trevose            PA         1981          60,000         81.3%    
                                                                                                               
                                                                                                               
   308 Harper Drive                       Mt. Laurel          NJ         1976          59,500        100.0%    
                                                                                                               
                                                                                                               
   1000 Axinn Avenue                     Garden City          NY         1965          59,000        100.0%    
                                                                                                               
   100 Berwyn Park                          Berwyn            PA         1986          58,612         97.0%    
                                                                                                               
                                                                                                               
                                                                                                               
   Arboretum I                             Richmond           VA         1988          58,167         97.9%    
                                                                                                               
                                                                                                               
                                                                                                               
   835 New Durham Road                      Edison            NJ         1974          58,095        100.0%    
                                                                                                               
   300 Welsh Road                          Horsham            PA         1980          57,793        100.0%    
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
   Westpark South Alston Avenue             Durham            NC         1985          56,601        100.0%    
                                                                                                               
                                                                                                               
   820 Third Avenue                    King Of Prussia        PA         1970          56,200        100.0%    
                                                                                                               
   2812 Emerywood Parkway                  Henrico            VA         1980          56,076        100.0%    
                                                                                                               
   Two Greentree Centre                    Marlton            NJ         1983          56,075         91.9%    
                                                                                                               
                                                                                                               
                                                                                                               
   One Greentree Centre                    Marlton            NJ         1982          55,838         93.8%    
                                                                                                               
                                                                                                               
                                                                                                               
   305 Fellowship Drive                   Mt. Laurel          NJ         1980          55,511         96.1%    
                                                                                                               
                                                                                                               
                                                                                                               
</TABLE>
<PAGE>

(RESTUBBED TABLE)

<TABLE>
<CAPTION>
                                                             Average                Tenants Leasing 10%
                                          Total Base Rent   Annualized              or More of Rentable
                                          for the Twelve    Rental Rate             Square Footage per
                                           Months Ended       as of                   Property as of
                                            December 31,     December              December 31, 1998 and
        Property Name                     1998 (b) (000's)  31, 1998 (c)            Lease Expiration Date
- - --------------------------------------    ----------------  ------------   ----------------------------------------------------
<S>                                             <C>          <C>           <C>                  <C>     <C> 
   104 Windsor Center Drive                      514          18.50        I-STAT Corporation (56%) - 9/03
                                                                           Green Tree Learning Centers, Inc. (20%) - 9/02
                                                                         
   6 East Clementon Road                         899          16.46        West Jersey Healtrh Systems (30%) - 3/01
                                                                           Insurance Marketing Services (18%) - 12/04
                                                                           Equifax Credit Information Services (15%) - 12/99
                                                                           Premium Bank (12%) - 9/00
                                                                         
   600 Highland Drive                            371           7.63        Excel Corporation (40%) - 7/01
                                                                           Key Food Beerage (14%) - 9/02
                                                                           Philadelphia Newspapers (12%) - 1/00
                                                                         
   16 Campus Boulevard                           691          15.10        Creative Financial (49%) - 5/06
                                                                           Atlantic Employees Credit Union (35%) - 1/06
                                                                         
   King & Harvard (f)                            152          17.15        General Services Administration (14%) - 7/01
                                                                         
   100 Commerce Drive                            898          14.00        The Travelers Bank (75%) - 12/01
                                                                           Blaze Systems Corporations (12%) - 9/00
                                                                         
   925 Harvest Drive                             605          17.08      
                                                                         
   610 Freedom Business Center (g)             1,178          24.70        The Hartford Steam Boiler Co. (55%) - 8/00
                                                                           UNUM Life Insurance Company (20%) - 7/02
                                                                           UB Networks, Incorporated (11%) - 12/01
                                                                         
   1974 Sproul Road                              875          15.42        Franklin Mint Credit Union (30%) - 5/02
                                                                           Main Line Book Company (22%) - 1/00
                                                                           Allan Coullautt Associates (20 %) - 2/03
                                                                           TMR, Incorporated (11%) - 10/02
                                                                         
   2200 Cabot Boulevard                          263           5.79        Nobel Printing Ink (43%) - 8/05
                                                                           Hussman Corporation (34%) - 3/99
                                                                           McCaffrey Management (21%) - 8/00
                                                                         
   4805 Lake Brooke Drive                        267          16.20        Kemper Insurance (51%) - 10/10
                                                                           Target (34%) - 2/03
                                                                           J. Sargeant Reynolds (11%) - 9/01
                                                                         
   701 East Gate Drive                           288          18.86        Lockheed Martin Corporation (51%) - 4/02
                                                                           Digital Equipment (16%) - 6/00
                                                                           American International (11%) - 1/00
                                                                         
   426 Lancaster Avenue                        1,157          17.71        GE Transport International Pool (100%) - 9/03
                                                                         
   321 Norristown Road                         1,011          17.66        Navisys (24%) - 12/02
                                                                           Bisys Plan Services (20%) - 7/02
                                                                           Bradford White Corporation (19%) - 12/01
                                                                         
   4000/5000 West Lincoln Drive                  743          13.57        Vilro Corporation (18%) - 5/01
                                                                         
   1000/2000 West Lincoln Drive                  751          13.58        Kaytes - Cooperman (10%) - 3/00 & 6/00
                                                                           Occupational Training Center (10%) - 7/02
                                                                         
   200 Corporate Center Drive                    715          18.00        Highmark, Incorporated (100%) - 4/01
                                                                         
   2575 Metropolitan Drive (d)                    --           0.00        Northtec LLC (65%) - 6/06
                                                                           Town & Country Van Lines (17%) - 12/98
                                                                         
   308 Harper Drive                              300          18.85        Harleysville Insurance Company (70%) - 4/03
                                                                           Cisco Systems (25%) - 8/03
                                                                         
   1000 Axinn Avenue                              68           4.86        Fortunoff Fine Jewelry & Silverware, Inc. (10%) - 1/02
                                                                         
   100 Berwyn Park                             1,070          24.09        Shared Medical Systems (49%) - 3/04
                                                                           Funds Associates, Ltd. (29%) - 1/02
                                                                           New York Currency Exchange (10%) - 9/02
                                                                         
   Arboretum I                                   228          15.59        New York Life Insurance Co. (15%) - 3/99
                                                                           Columbia HCA (13%) - 6/01
                                                                           Reliance Insurance Company (11%) - 2/00
                                                                         
   835 New Durham Road                            75           5.44        Western Union International, Inc. (100%) - 2/05
                                                                         
   300 Welsh Road                                918          17.62        Digital Cable Radio (31%) - 9/03
                                                                           American Meter Company - (30%) - 7/99
                                                                           A.G. Edwards & Sons, Inc. (14%) - 12/03
                                                                           Abington OB/GYN (11%) - 10/01
                                                                         
   Westpark South Alston Avenue                  263          18.29        Cato Research (70%) - 7/01
                                                                           Sandler & Recht (25%) - 7/00
                                                                         
   820 Third Avenue                              193           4.47        SmithKline Beecham Corporation (100%) - 10/00
                                                                         
   2812 Emerywood Parkway                        143          10.43        American Home Funding (100%) - 1/03
                                                                         
   Two Greentree Centre                          795          18.24        Merrill, Lynch, Pierce, Fenner (26%) - 12/99 & 11/05
                                                                           IBS Interactive (12%) - 12/03
                                                                           Chubb Institute (10%) - 12/00
                                                                         
   One Greentree Centre                          930          18.04        American Executive Services (30%) - 1/06
                                                                           Temple University (18%) - 12/02
                                                                           West Jersey Health (15%) - 4/01
                                                                         
   305 Fellowship Drive                          238          17.25        Golder Associates (35%) - 10/99
                                                                           Paychex (24%) - 4/00
                                                                           Retail Publications (15%) - 2/00
                                                                           Metro Commercial Real Estate (11%) - 8/99
</TABLE>
                                      -22-
<PAGE>

<TABLE>
<CAPTION>
                                                                                                              
                                                                                                              
                                                                                        Net       Percentage  
                                                                                     Rentable    Leased as of 
                                                                         Year         Square      December    
        Property Name                      Location         State        Built         Feet      31, 1998 (a) 
- - ----------------------------------      -------------       -----       ------        -------    ------------ 
<S>                                     <C>                 <C>         <C>           <C>         <C>         
   309 Fellowship Drive                   Mt. Laurel          NJ         1982          55,351         91.1%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   307 Fellowship Drive                   Mt. Laurel          NJ         1981          55,286         70.4%   
                                                                                                              
   8000 Lincoln Drive                      Marlton            NJ         1997          54,923        100.0%   
                                                                                                              
                                                                                                              
   6810 Snowdrift Way                     Allentown           PA         1975          54,844        100.0%   
                                                                                                              
                                                                                                              
   303 Fellowship Drive                   Mt. Laurel          NJ         1979          53,848         82.1%   
                                                                                                              
                                                                                                              
                                                                                                              
   2010 Cabot Boulevard                   Langhorne           PA         1985          53,421         98.9%   
                                                                                                              
                                                                                                              
                                                                                                              
   680 Allendale Road                  King Of Prussia        PA         1962          52,528        100.0%   
                                                                                                              
   2240/50 Butler Pike                  Plymouth Meeting      PA         1984          52,183         99.4%   
                                                                                                              
                                                                                                              
   650 Park Avenue                     King Of Prussia        PA         1968          51,711          2.1%   
                                                                                                              
   486 Thomas Jones Way                     Exton             PA         1990          51,500         99.2%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   1155 Business Center Drive              Horsham            PA         1990          51,388         97.4%   
                                                                                                              
                                                                                                              
   25 Phillips Parkway                     Montvale           NJ         1988          51,155        100.0%   
                                                                                                              
   2 Foster Avenue                        Gibbsboro           NJ         1974          50,761         94.6%   
                                                                                                              
   855 Springdale Drive                     Exton             PA         1986          50,750        100.0%   
                                                                                                              
   Dabney VI                               Richmond           VA         1986          50,400        100.0%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   875 First Avenue                    King Of Prussia        PA         1966          50,000        100.0%   
                                                                                                              
   630 Clark Avenue                    King Of Prussia        PA         1960          50,000        100.0%   
                                                                                                              
   620 Allendale Road                  King Of Prussia        PA         1961          50,000        100.0%   
                                                                                                              
                                                                                                              
   650 Clark Avenue                    King Of Prussia        PA         1965          50,000        100.0%   
                                                                                                              
                                                                                                              
                                                                                                              
   741 Third Avenue                    King Of Prussia        PA         1962          50,000        100.0%   
                                                                                                              
   44 National Road                         Edison            NJ         1967          50,000        100.0%   
                                                                                                              
   102 Chestnut Ridge Road                 Montvale           NJ         1979          49,671        100.0%   
                                                                                                              
   Arboretum II                            Richmond           VA         1988          49,642         99.8%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   7150 Windsor Drive                     Allentown           PA         1988          49,420        100.0%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   837 New Durham Road                      Edison            NJ         1977          48,200        100.0%   
                                                                                                              
                                                                                                              
   520 Virginia Drive                  Fort Washington        PA         1987          48,122        100.0%   
                                                                                                              
   Arboretum V                             Richmond           VA         1988          47,943         96.1%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   456 Creamery Way                         Exton             PA         1987          47,604        100.0%   
                                                                                                              
   4000 Midlantic Drive                   Mt. Laurel          NJ         1998          46,945        100.0%   
                                                                                                              
   220 Commerce Drive                  Fort Washington        PA         1985          46,366        100.0%   
                                                                                                              
                                                                                                              
   6575 Snowdrift Road                    Allentown           PA         1988          46,250        100.0%   
</TABLE>
<PAGE>

(RESTUBBED TABLE)
<TABLE>
<CAPTION>
                                                        Average                Tenants Leasing 10%
                                     Total Base Rent   Annualized              or More of Rentable
                                     for the Twelve    Rental Rate             Square Footage per
                                      Months Ended       as of                   Property as of
                                       December 31,     December              December 31, 1998 and
        Property Name                1998 (b) (000's)  31, 1998 (c)            Lease Expiration Date
- - ----------------------------------   ----------------  ------------   ----------------------------------------------------
<S>                                   <C>               <C>            <C>
   309 Fellowship Drive                      195          17.03        HQ Mount Laurel, Inc. (20%) - 4/08
                                                                       Allied Bond & Collection (18%) - 7/01
                                                                       PSE & G (14%) - 7/00
                                                                       Merchants Mutual Insurance (13%) - 6/01
                                                                       General Accident Insurance (11%) - 4/99
                                                                     
   307 Fellowship Drive                      192          17.87        PRC, Incorporated (10%) - 12/98
                                                                     
   8000 Lincoln Drive                        960          17.65        Computer Sciences Corporation (67%) - 11/01
                                                                       Blue Cross (33%) - 5/07
                                                                     
   6810 Snowdrift Way                         66           4.27        Air Products & Chemical (73%) - 8/01
                                                                       Herr Foods, Inc. (27%) - 7/02
                                                                     
   303 Fellowship Drive                      196          17.88        Star Enterprises (33%) - 1/00
                                                                       The Prudential Insurance Company (28%) - 2/99
                                                                       Larami / Hasbro (22%) - 12/99
                                                                     
   2010 Cabot Boulevard                      387           9.63        Computer Hardware Maintenance (55%) - 1/03
                                                                       DiMark, Inc. (32%) - 9/99
                                                                       Digital Descriptor Systems (11%) - 6/00
                                                                     
   680 Allendale Road                        294          10.14        Immunization Products, Ltd. (100%) - 9/00
                                                                     
   2240/50 Butler Pike                       678          18.12        First Union Bank (58%) - 4/06
                                                                       TWA Marketing (33%) - 10/99
                                                                     
   650 Park Avenue                           835          16.50      
                                                                     
   486 Thomas Jones Way                      616          17.12        First American Real Estate Tax Service (24%) - 1/04
                                                                       Toshiba American Medical Systems (12%) - 6/02
                                                                       Cape Environmental (12%) - 7/02
                                                                       ICI America's, Inc. (12%) - 11/00
                                                                       J. Reckner Associates, Inc. (10%) - 9/03
                                                                     
   1155 Business Center Drive                659          18.27        IMS (84%) - 3/06
                                                                       Motorola Products (14%) - 2/99
                                                                     
   25 Phillips Parkway                       285          25.85        Volvo North America Corporation (100%) - 3/01
                                                                     
   2 Foster Avenue                           189           4.10        Harbor Laundry, Inc. (95%) - 8/00
                                                                     
   855 Springdale Drive                      776          15.00        Environmental Resources (100%) - 7/01
                                                                     
   Dabney VI                                  64           5.15        KPA, Inc. (33%) - 2/01
                                                                       Cort Furniture Rental (25%) - 2/02
                                                                       West Home Health (25%) - 7/01
                                                                       Goodall Rubber Company (17%) - 5/01
                                                                     
   875 First Avenue                          262           6.38        Centennial Printing Corporation (100%) - 6/02
                                                                     
   630 Clark Avenue                          262           5.67        Metro Fiber Systems of Philadelphia (100%) - 9/12
                                                                     
   620 Allendale Road                        371          10.76        Executone Information Systems, Inc. - 50 %) - 9/01
                                                                       Proconex, Inc. (50%) - 6/00
                                                                     
   650 Clark Avenue                          152           5.38        Eastern Telelogic Corporation (50%) - 8/09
                                                                       PPG Industries (36%) - 3/00
                                                                       Republic Builders Products (14%) - 7/00
                                                                     
   741 Third Avenue                          218           6.69        United States Postal Service (75%) - 4/01
                                                                     
   44 National Road                           43           3.57        Sawdust Pencil Company (100%) - 5/00
                                                                     
   102 Chestnut Ridge Road                   258          20.66        Geotek Communications, Inc. (100%) - 11/06
                                                                     
   Arboretum II                              141          11.07        Commonwealth Propane (29%) - 6/05
                                                                       Chippenham / Johnston Willis (23%) - 7/00
                                                                       Lanier Worldwide, Inc. (11%) - 1/00
                                                                       Rogers American (10%) - 1/00
                                                                       Virginia Multispecialty Services (10%) - 3/03
                                                                     
   7150 Windsor Drive                        116          11.22        Bell Atlantic PA (35%) - 10/99
                                                                       ICT Group (20%) - 2/01
                                                                       Monsanto Company (20%) - 2/99
                                                                       Interior Workplace Solutions (15%) - 5/99
                                                                       Linden Optical (11%) - 3/01
                                                                     
   837 New Durham Road                        39           4.17        TLC Warehouse Corporation (50%) -11/01
                                                                       Lex Associates, Inc. (50%) - 12/02
                                                                     
   520 Virginia Drive                        642          13.42        The Vandeveer Group (100%) - 8/00
                                                                     
   Arboretum V                               157          12.78        Alan Bradley Corporation (25%) - 11/99
                                                                       U.S. Marine Corps (17%) - 6/01
                                                                       Land America Financial Group (17%) - 1/00
                                                                       Virginia Multispecialty Services (15%) - 3/03
                                                                       Whiting turner Contracting Co. (11%) - 12/00
                                                                     
   456 Creamery Way                          354           7.68        Neutronics (100%) - 1/03
                                                                     
   4000 Midlantic Drive                      579          17.25        Axiom (100%) - 4/08
                                                                     
   220 Commerce Drive                        743          16.46        U.S. Physicians, Inc. (29%) - 6/02
                                                                       Temple University (25%) - 4/01
                                                                     
   6575 Snowdrift Road                       331           9.78        Corning Packaging (100%) - 2/00

</TABLE>
                                      -23-
<PAGE>

<TABLE>
<CAPTION>
                                                                                                            
                                                                                                            
                                                                                       Net       Percentage 
                                                                                    Rentable    Leased as of
                                                                         Year        Square       December  
        Property Name                    Location          State        Built         Feet      31, 1998 (a)
- - ------------------------------      ------------------     -----        -----       --------   -------------
<S>                                  <C>                   <C>          <C>          <C>        <C>
   Five Eves Drive                         Marlton            NJ         1986          45,889         85.3% 
                                                                                                            
                                                                                                            
                                                                                                            
   Dabney V                                Richmond           VA         1985          45,353        100.0% 
                                                                                                            
                                                                                                            
                                                                                                            
   Dabney XI                               Richmond           VA         1994          45,250        100.0% 
                                                                                                            
                                                                                                            
                                                                                                            
                                                                                                            
                                                                                                            
   2201 Dabney Street                      Richmond           VA         1962          45,000        100.0% 
                                                                                                            
   500 Scarborough Drive               Egg Harbor Twp.        NJ         1987          44,750         83.5% 
                                                                                                            
                                                                                                            
                                                                                                            
   501 Scarborough Drive               Egg Harbor Twp.        NJ         1987          44,750        100.0% 
                                                                                                            
                                                                                                            
                                                                                                            
   140 Terry Drive                         Newtown            PA         1982          43,929        100.0% 
                                                                                                            
                                                                                                            
                                                                                                            
   9000 West Lincoln Drive                 Marlton            NJ         1983          43,719         97.8% 
                                                                                                            
   110 Summit Drive                         Exton             PA         1985          43,660        100.0% 
                                                                                                            
                                                                                                            
                                                                                                            
   336 South Service Road                  Melville           NY         1965          43,600        100.0% 
                                                                                                            
   7248 Tilghman Street                   Allentown           PA         1987          42,863         97.5% 
                                                                                                            
                                                                                                            
   2535 Metropolitan Drive (d)             Trevose            PA         1974          42,000        100.0% 
                                                                                                            
   Dabney II                               Richmond           VA         1983          42,000        100.0% 
                                                                                                            
                                                                                                            
                                                                                                            
                                                                                                            
                                                                                                            
   Dabney IV                               Richmond           VA         1985          41,550        100.0% 
                                                                                                            
                                                                                                            
                                                                                                            
                                                                                                            
                                                                                                            
   Main Street - Piazza                    Voorhees           NJ         1990          41,400        100.0% 
                                                                                                            
                                                                                                            
                                                                                                            
                                                                                                            
   7020 Snowdrift Way                     Allentown           PA         1975          41,390        100.0% 
                                                                                                            
                                                                                                            
   20 East Clementon Road                 Gibbsboro           NJ         1986          40,755         78.1% 
                                                                                                            
                                                                                                            
                                                                                                            
                                                                                                            
   1000 East Lincoln Drive                 Marlton            NJ         1981          40,600        100.0% 
                                                                                                            
                                                                                                            
   7310 Tilghman Street                   Allentown           PA         1985          40,000         54.5% 
                                                                                                            
                                                                                                            
                                                                                                            
   2510 Metropolitan Drive (d)             Trevose            PA         1981          40,000        100.0% 
                                                                                                            
   2250 Cabot Boulevard                   Langhorne           PA         1982          40,000        100.0% 
                                                                                                            
   2000 Cabot Boulevard                   Langhorne           PA         1985          39,969         77.5% 
                                                                                                            
                                                                                                            
                                                                                                            
   150 Corporate Center Drive             Camp Hill           PA         1987          39,401         85.6% 
                                                                                                            
                                                                                                            
                                                                                                            
   600 Park Avenue                     King Of Prussia        PA         1964          39,000        100.0% 
                                                                                                            
   1336 Enterprise Drive                 West Goshen          PA         1989          38,470        100.0% 
                                                                                                            
   755 Business Center Drive               Horsham            PA         1998          38,050        100.0% 
                                                                                                            
   18 Campus Boulevard                  Newtown Square        PA         1990          37,700         99.1% 
                                                                                                            
                                                                                                            
                                                                                                            
                                                                                                            
   Two Eves Drive                          Marlton            NJ         1987          37,668         99.6% 
            
</TABLE>
<PAGE>


<TABLE>
<CAPTION>
                                                            Average                Tenants Leasing 10%
                                         Total Base Rent   Annualized              or More of Rentable
                                         for the Twelve    Rental Rate             Square Footage per
                                          Months Ended       as of                   Property as of
                                           December 31,     December              December 31, 1998 and
        Property Name                   1998 (b) (000's)  31, 1998 (c)            Lease Expiration Date
- - ------------------------------          ----------------  -------------     ----------------------------------------------------
<S>                                               <C>          <C>          <C>  
   Five Eves Drive                                570          16.55        ADP Financial Information (36%) - 12/98
                                                                            Samaritan Hospice (25%) - 2/04
                                                                            McCay Corporation (18%) - 10/00
                                                                          
   Dabney V                                        74           5.65        Carriage House (40%) - 3/03
                                                                            Office Masters (12%) - 4/02
                                                                            Alkat Electrical (11%) - 7/99
                                                                          
   Dabney XI                                       78           6.51        Ademco Distribution (31%) - 4/04
                                                                            Thulman Eastern (24%) - 7/00
                                                                            Dal Tile  Corporation (16%) - 9/04
                                                                            Information Integration (16%) - 6/99
                                                                            DHL Airways (14%) - 7/99
                                                                          
   2201 Dabney Street                              44           3.65        Morton Marks (100%) - 6/99
                                                                          
   500 Scarborough Drive                          619          20.73        Raytheon Services (16%) - 9/02
                                                                            The Mitre Corporation ( 16) - 12/00
                                                                            NYMA, Inc. (13%) - 10/99
                                                                          
   501 Scarborough Drive                          845          18.37        TMA (34%) - 3/02
                                                                            Computer Sciences Corporation (33%) - 10/00
                                                                            Lockheed Martin Corporation (33%) - 1/01
                                                                          
   140 Terry Drive                                                          Dept. of General Services (31%) - 12/00
                                                                            Media Marketplace (23%) - 4/03
                                                                            Bellevue Avenue Mgmt Corp. (16%) - 7/99
                                                                          
   9000 West Lincoln Drive                        563          14.53        Counseling Program (18%) - 1/00
                                                                          
   110 Summit Drive                               353          11.40        Maris Equipment (49%) - 4/99
                                                                            Pall Trincor (30%) - 3/02
                                                                            DGH Technology (12%) - 9/99
                                                                          
   336 South Service Road                          83           8.32        Nikon, Inc. (100%) - 4/01
                                                                          
   7248 Tilghman Street                           439          15.91        Ohio Casualty (46%) - 7/01
                                                                            IDS Financial Services (29%) - 7/01
                                                                          
   2535 Metropolitan Drive (d)                      -           0.00        Larson  - Juhl (100%) - 10/03
                                                                          
   Dabney II                                       54           5.00        Wynne Guild (30%) - 1/01
                                                                            Mirror Company (30%) - 9/99
                                                                            Cavalier Flooring Systems, Inc. (20%) - 4/03
                                                                            Dominion Restoration (10%) - 7/00
                                                                            Unit Instruments (10%) - 6/02
                                                                          
   Dabney IV                                       50           5.46        United Power Corporation (30%) - 4/02
                                                                            Virginia Donuts (29%) - 9/08
                                                                            Dillard Paper Company (20%) - 11/01
                                                                            KCI Therapeutics (10%) - 6/00
                                                                            Scherr's Refrigeration (10%) - 4/03
                                                                          
   Main Street - Piazza                           566          13.82        Cooper Hospital (41%) - 2/01 & 7/01
                                                                            Lincoln Investments (20%) - 8/03
                                                                            Chamber of Commerce (10%) - 8/01
                                                                            South N.J. Medical (10%) - 3/00
                                                                          
   7020 Snowdrift Way                              40           4.67        Air Products & Chemical (72%) - 8/01
                                                                            Interior Solutions (28%) - 4/99
                                                                          
   20 East Clementon Road                         598          18.39        Serco, Inc. (15%) - 12/05
                                                                            R.Randle Scarborough, Inc. (15%) - 12/00
                                                                            Medaquist Receivables Mgmt Co. (14%) - 4/03
                                                                            The State of New Jersey (13%) - 8/07
                                                                          
   1000 East Lincoln Drive                        150           5.45        Packquisition Corporation (75%) - 2/01
                                                                            Allison Andrews Corporation (25%) - 10/99
                                                                          
   7310 Tilghman Street                           235          14.49        Lucent Technologies (15%) - 7/03
                                                                            PECO Hyperion Telecommunications (12%) - 10/03
                                                                            The Donnelley Directory (10%) - 7/99
                                                                          
   2510 Metropolitan Drive (d)                      -           0.00        Philadelphia Choice Television (100%) - 6/99
                                                                          
   2250 Cabot Boulevard                           176           5.78        Bucks County Nut (100%) - 7/04
                                                                          
   2000 Cabot Boulevard                           269          10.47        Ecogen, Inc. (37%) - 3/00
                                                                            Rom - Tec, Inc. (28%) - 9/02
                                                                            AGIE, Ltd. (13%) - 1/01
                                                                          
   150 Corporate Center Drive                     390          17.59        Highmark, Incorporated (37%) - 12/00
                                                                            The Prudential Insurance Company (15%) - 7/00
                                                                            Handler, Gerber, Johnston, Aronson (12%) - 12/99
                                                                          
   600 Park Avenue                                404          13.26        Smithkline Beecham Corporation (100%) - 5/02
                                                                          
   1336 Enterprise Drive                          452          13.66        CFM Technologies, Inc. (100%) - 11/00
                                                                          
   755 Business Center Drive                        -          19.63        Scirex Corporation (100%) - 1/09
                                                                          
   18 Campus Boulevard                            451          19.12        Emax Solution Partners (48%) - 6/03
                                                                            LR, Incorporated (20%) - 8/03
                                                                            Marshall Dennehey (17%) - 10/01
                                                                            ING N.American Insurance Holdings (15%) - 6/99
                                                                          
   Two Eves Drive                                 449          17.23        Basco Associates (24%) - 2/01
                                                                            Acceptance Risk Management (18%) - 4/00
</TABLE>
                                      -24-
<PAGE>

<TABLE>
<CAPTION>
                                                                                                             
                                                                                                             
                                                                                        Net       Percentage 
                                                                                     Rentable    Leased as of
                                                                         Year         Square      December   
        Property Name                      Location         State        Built         Feet      31, 1998 (a)
- - -------------------------------      --------------------   -----       ------        -------    ------------
<S>                                      <C>                 <C>         <C>           <C>            <C>    
   1255 Broad Street                      Bloomfield          NJ         1981          37,478         97.4%  
                                                                                                             
                                                                                                             
   2512 Metropolitan Drive                 Trevose            PA         1981          37,000        100.0%  
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
   3000 West Lincoln Drive                 Marlton            NJ         1982          36,070         88.1%  
                                                                                                             
   645 Stewart Avenue                    Garden City          NY         1962          35,552        100.0%  
                                                                                                             
   3000 Cabot Boulevard                   Langhorne           PA         1986          34,693        100.0%  
                                                                                                             
                                                                                                             
                                                                                                             
   Dabney I                                Richmond           VA         1982          33,600        100.0%  
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
   Dabney VII                              Richmond           VA         1987          33,419         99.0%  
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
   Dabney A-2                              Richmond           VA         1993          33,050        100.0%  
                                                                                                             
   7010 Snowdrift Way                     Allentown           PA         1991          33,029        100.0%  
                                                                                                             
                                                                                                             
   168 Franklin Corner Drive            Lawrenceville         NJ         1976          32,000         60.0%  
                                                                                                             
                                                                                                             
                                                                                                             
   2260 Butler Pike                     Plymouth Meeting      PA         1984          31,892        100.0%  
                                                                                                             
                                                                                                             
                                                                                                             
   Main Street - Promenade                 Voorhees           NJ         1988          31,445         94.4%  
                                                                                                             
                                                                                                             
                                                                                                             
   Arboretum VII                           Richmond           VA         1991          30,791         79.4%  
                                                                                                             
                                                                                                             
                                                                                                             
   120 West Germantown Pike             Plymouth Meeting      PA         1984          30,546        100.0%  
                                                                                                             
                                                                                                             
   Dabney IX                               Richmond           VA         1989          30,263         93.0%  
                                                                                                             
                                                                                                             
                                                                                                             
   650 Dresher Road                        Horsham            PA         1984          30,138        100.0%  
                                                                                                             
   655 Business Center Drive               Horsham            PA         1997          30,000         95.5%  
                                                                                                             
                                                                                                             
                                                                                                             
   Dabney VIII                             Richmond           VA         1988          29,700        100.0%  
                                                                                                             
   2260/70 Cabot Boulevard                Langhorne           PA         1984          29,638         87.7%  
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
   304 Harper Drive                       Mt. Laurel          NJ         1975          29,537         86.9%  
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
   2407 Park Drive                        Harrisburg          PA         1985          29,228         94.2%  
                                                                                                             
                                                                                                             
   468 Creamery Way                         Exton             PA         1990          28,934        100.0%  
                                                                                                             
                                                                                                             
   80 Sky;ine Drive                       Plainview           NY         1961          28,822        100.0%  
                                                                                                             
                                                                                                             
   120 Express Street                     Plainview           NY         1962          27,729        100.0%  
                                                                                                             
                                                                                                             
   Four B Eves Drive                       Marlton            NJ         1987          27,038         99.9%  
                                                                                                             
                                                                                                             
                                                                                                             
   1150 Berkshire Boulevard                Reading            PA         1979          26,821         94.6%  
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             
   140 West Germantown Pike             Plymouth Meeting      PA         1984          25,947         70.0%  
                                                                                                             
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
                                                         Average                Tenants Leasing 10%
                                      Total Base Rent   Annualized              or More of Rentable
                                      for the Twelve    Rental Rate             Square Footage per
                                       Months Ended       as of                   Property as of
                                        December 31,     December              December 31, 1998 and
        Property Name                 1998 (b) (000's)  31, 1998 (c)            Lease Expiration Date
- - -------------------------------       ----------------  ------------   ----------------------------------------------------
<S>                                           <C>          <C>          <C>
   1255 Broad Street                          138          19.91        Charles M. Cummins & Elliot Shack (75%) - 2/06
                                                                        Menno Travel Services (14%) - 10/03
                                                                      
   2512 Metropolitan Drive                      -           0.00        Bucks County Midweek, Inc. (40%) - 6/03
                                                                        William Adams II, Inc. (30%) - 5/99
                                                                        Philadelphia Newspapers, Inc. (17%) - 10/00
                                                                        Stolarik Donohue Associates, Inc. (14%) - 3/00
                                                                      
   3000 West Lincoln Drive                    388          14.14        Abo, Uris & Allenburger (20%) - 1/99
                                                                      
   645 Stewart Avenue                          34           9.93        Hearst Business Communications (100%) - 12/03
                                                                      
   3000 Cabot Boulevard                       543          17.52        Geraghty & Miller (27%) - 4/03
                                                                        Fidelity Bond & Mortgage Co. (15%) - 10/01
                                                                        Luigi Bormioli Company (15%) - 7/04
                                                                      
   Dabney I                                    45           5.45        Media Post (25%) - 1/00
                                                                        Visual Aids (25%) - 5/01
                                                                        Ellis Flooring (23%) - 1/07
                                                                        Durfee Thurber (15%) - 5/99
                                                                        Unisource Worldwide, Inc. (13%) - 6/99
                                                                      
   Dabney VII                                  56           7.40        Delmar Communications (22%) - 7/02
                                                                        McKinney & Company (20%) - 9/99
                                                                        Canning Corporation (15%) - 12/01
                                                                        Xerox Corporation (15%) - 6/02
                                                                        Pharmaco International (14%) - 1/04 & 8/04
                                                                        Suitable for Framing 914%) - 8/01
                                                                      
   Dabney A-2                                  54           8.57        Pharmaco LSR International, Inc. (100%) - 8/04
                                                                      
   7010 Snowdrift Way                         103          14.43        Vitalink Pharmacy (61%) - 11/02
                                                                        Anderson BDG Corporation (39%) - 6/03
                                                                      
   168 Franklin Corner Drive                  227          14.85        Pennsbury Family Medical (16%) - 1/00
                                                                        Crawford & Company (14%) - 11/99
                                                                        Dr. Belden (12%) - 5/01
                                                                      
   2260 Butler Pike                           428          18.59        Information Resources (66%) - 12/00
                                                                        Ostroff, Fair & Company P.C. (25%) - 7/04
                                                                        Alarmex Distributors (10%) - 8/99
                                                                      
   Main Street - Promenade                    360          12.96        West Jersey Hospital (25%) - 3/00
                                                                        Morgenstern (14%) - 5/99
                                                                        First Union Bank (10%) - 2/99
                                                                      
   Arboretum VII                              112          12.79        Bell Industries (50 %) - 12/02
                                                                        B.F. Saul Mortgage Company (20%) - 8/99
                                                                        Jess Duboy Advertising (10%) - 2/02
                                                                      
   120 West Germantown Pike                   387          18.34        Clair Odell Insurance Agency (82%) - 7/01
                                                                        Kleinert's, Inc. (13%) - 10/01
                                                                      
   Dabney IX                                   64           8.13        First Image Management (28%) - 7/01
                                                                        A&J Telephone Systems (21%) - 11/02
                                                                        Business Equipment (14%) - 7/01
                                                                      
   650 Dresher Road                           369          16.19        GMAC (100%) - 5/03
                                                                      
   655 Business Center Drive                  319          18.48        Letven, Diccicco & Battista, Inc. (54%) - 9/07
                                                                        Paccar Financial Corporation (22%) - 6/02
                                                                        Legg Mason Wood Walker (14%) - 5/04
                                                                      
   Dabney VIII                                 52           6.33        United Power Corporation (100%) - 4/02
                                                                      
   2260/70 Cabot Boulevard                    274          13.53        Sager Electrical (14%) - 10/99
                                                                        Manufacturers Survey (13%) - 12/01
                                                                        Terminix International (13%) - 10/02
                                                                        Pronet Incorporated (10%) - 3/02
                                                                      
   304 Harper Drive                           114          17.09        Semcor (23%) - 12/99
                                                                        Legg Mason Wood Walker (20%) - 6/02
                                                                        Pro - Tech Resource (17%) - 5/99
                                                                        Tab Products (11%) - 5/99
                                                                        Costanza Spector Clauser Architects (10%) - 9/01
                                                                      
   2407 Park Drive                            210           6.87        Barakos-Landino, Inc. (49%) - 10/00
                                                                        AGIS Security Insurance Company (45%) - 10/00
                                                                      
   468 Creamery Way                           292          14.76        Franciscan Health Systems (82%) - 6/99
                                                                        American Day Treatment (18%) - 6/00
                                                                      
   80 Sky;ine Drive                            69          10.74        Automated Financial System (68%) - 1/99
                                                                        Chester County District Court - (32%) - 1/99
                                                                      
   120 Express Street                          40           9.42        Tyz - All Plastics, Inc. (55%) - 11/08
                                                                        Henderson & Bodwell (45%) - 9/02
                                                                      
   Four B Eves Drive                          310          15.49        ISO Commercial Risk (66%) - 6/00
                                                                        Global Industries, Inc. (17%) - 7/00
                                                                        Banc One Financial (16%) - 4/01
                                                                      
   1150 Berkshire Boulevard                   395          15.10        Berks Cardiologists, Ltd. (20%) - 12/98
                                                                        Ervin Levin, D.D.S. (12%) - 3/03
                                                                        Jessee L. Pleet, Esq. (10%) - 6/00
                                                                        Berkshire Psychiatric & Behavioral Health (10%) - 4/99
                                                                      
   140 West Germantown Pike                   315          18.17        Healthcare, Inc. (46%) - 9/99
                                                                        National Health Equity (20%) - 5/99
</TABLE>
                                      -25-
<PAGE>

<TABLE>
<CAPTION>
                                                                                                              
                                                                                                              
                                                                                        Net       Percentage  
                                                                                     Rentable    Leased as of 
                                                                         Year         Square      December    
        Property Name                      Location         State        Built         Feet      31, 1998 (a) 
- - ----------------------------------------------------------  -----       ------        -------    ------------ 
<S>                                      <C>                <C>         <C>           <C>          <C>        
   110 Voice Road                        Carle Place          NY         1963          25,920        100.0%   
                                                                                                              
   815 East Gate Drive                    Mt. Laurel          NJ         1986          25,500         87.0%   
                                                                                                              
                                                                                                              
   2405 Park Drive                        Harrisburg          PA         1985          25,495         89.6%   
                                                                                                              
                                                                                                              
                                                                                                              
   817 East Gate Drive                    Mt. Laurel          NJ         1986          25,351        100.0%   
                                                                                                              
                                                                                                              
   100 Voice Road                        Carle Place          NY         1963          25,000        100.0%   
                                                                                                              
   800 Corporate Circle Drive             Harrisburg          PA         1979          24,779         92.5%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   Four A Eves Drive                       Marlton            NJ         1987          24,631         80.8%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   1 Foster Avenue                        Gibbsboro           NJ         1972          24,255        100.0%   
                                                                                                              
   Dabney III                              Richmond           VA         1986          23,850        100.0%   
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
   180 Central Ave. / 2 Engineers Ln.    Farmingdale          NY         1960          23,715         91.5%   
                                                                                                              
   4 Foster Avenue                        Gibbsboro           NJ         1974          23,372        100.0%   
                                                                                                              
                                                                                                              
                                                                                                              
   EM - Venture I - Keystone Park          Bristol            PA         1985          22,500          0.0%   
                                                                                                              
   10 Skyline Drive                       Plainview           NY         1960          22,200         93.4%   
                                                                                                              
                                                                                                              
                                                                                                              
   2005 Cabot Boulevard                   Langhorne           PA         1985          22,000        100.0%   
                                                                                                              
   7 Foster Avenue                        Gibbsboro           NJ         1983          21,843         90.2%   
                                                                                                              
                                                                                                              
   2490 Boulevard of the Generals      King Of Prussia        PA         1975          20,600        100.0%   
                                                                                                              
   10 Foster Avenue                       Gibbsboro           NJ         1983          18,941         98.5%   
                                                                                                              
                                                                                                              
   111 Ames Court                         Plainview           NY         1959          18,000         97.1%   
                                                                                                              
                                                                                                              
                                                                                                              
   600 Corporate Circle Drive             Harrisburg          PA         1978          17,858        100.0%   
                                                                                                              
   11 Commercial Street                   Plainview           NY         1961          17,548        100.0%   
                                                                                                              
   500 Nationwide Drive                   Harrisburg          PA         1977          16,015        100.0%   
                                                                                                              
                                                                                                              
   1720 Walton Road                       Blue Bell           PA         1968          15,918         39.6%   
                                                                                                              
                                                                                                              
   2110 Tomlynn Street                     Richmond           VA         1965          15,910        100.0%   
                                                                                                              
   Dabney A-1                              Richmond           VA         1984          15,389        100.0%   
                                                                                                              
                                                                                                              
   8 Engineers Lane                      Farmingdale          NY         1963          15,000        100.0%   
                                                                                                              
   305 Harper Drive                       Mt. Laurel          NJ         1979          14,980        100.0%   
                                                                                                              
   748 Springdale Drive                     Exton             PA         1986          13,844        100.0%   
                                                                                                              
                                                                                                              
   2404 Park Drive                        Harrisburg          PA         1983          11,000        100.0%   
                                                                                                              
                                                                                                              
   2401 Park Drive                        Harrisburg          PA         1984          10,074        100.0%   
                                                                                                              
                                                                                                              
                                                                                                              
   19 Engineers Lane                     Farmingdale          NY         1962          10,000        100.0%   
                                                                                                              
   5 U.S. Avenue                          Gibbsboro           NJ         1987           5,000        100.0%   
                                                                                                              
   50 East Clementon Road                 Gibbsboro           NJ         1986           3,080        100.0%   
                                                                                                              
   200 Nationwide Drive                   Harrisburg          PA         1978           2,500        100.0%   
                                                                                                              
   5 Foster Avenue                        Gibbsboro           NJ         1968           2,000         50.0%   
                                                                                                              
TOTAL ALL PROPERTIES / WEIGHTED AVG.                                               18,833,986         93.6%   
                                                                                   ==========        ======   
</TABLE>
<PAGE>



<TABLE>
<CAPTION>
                                                               Average                Tenants Leasing 10%
                                            Total Base Rent   Annualized              or More of Rentable
                                            for the Twelve    Rental Rate             Square Footage per
                                             Months Ended       as of                   Property as of
                                              December 31,     December              December 31, 1998 and
        Property Name                       1998 (b) (000's)  31, 1998 (c)            Lease Expiration Date
- - -----------------------------------         ----------------  ------------   ----------------------------------------------------
<S>                                           <C>              <C>            <C>
   110 Voice Road                                    35           7.92        Scales Air Compressor Corp. (100%) - 12/01
                                                                            
   815 East Gate Drive                               67          13.73        Semcor (54%) - 1/00
                                                                              Wyle Laboratories (33%) - 11/01
                                                                            
   2405 Park Drive                                  224          15.39        Consolidated Rail Corporation (34%) - 9/01
                                                                              R.H. Ho;sberg & Company (11%) - 8/02
                                                                              United of Omaha Life Insurance Co. (10%) - 10/02
                                                                            
   817 East Gate Drive                               80          10.40        Landress Co. - Emtec (62%) - 3/01
                                                                              Concentra (38%) - 5/04
                                                                            
   100 Voice Road                                    50          10.51        First  Lafayette Acquisition (100%) - 12/00
                                                                            
   800 Corporate Circle Drive                       196          13.92        Dame Media Incorporated (28%) - 8/02
                                                                              Andrews, Sacunas & Saline Office (22%) - 7/02
                                                                              Leukemia Society of America (13%) - 9/01
                                                                              The Harrisburg Symphony (11%) - 6/03
                                                                            
   Four A Eves Drive                                210          14.86        Advanced Systems (23%) - 4/99
                                                                              Eastern American (18%) - 9/02
                                                                              Benefit Resources (17%) - 2/99
                                                                              HIP Health Plan of New Jersey (13%) - 6/99
                                                                              Columbia Investment Builders (10%) - 1/99
                                                                            
   1 Foster Avenue                                  105           4.32        West Jersey Health System (100%) - 3/03
                                                                            
   Dabney III                                        37           5.89        United Power Corporation (42%) - 8/01
                                                                              Unijax (30%) - 1/00
                                                                              Swinging Door (15%) - 10/03
                                                                              Graphic Productions (14%) - 10/03
                                                                            
   180 Central Ave. / 2 Engineers Ln.                32           6.06        Yaleet, Inc. (92%) - 6/05
                                                                            
   4 Foster Avenue                                  179           8.25        Harbor Laundry, Inc. (62%) - 8/00
                                                                              Medical Data Exchange, Inc. (27%) - 2/99
                                                                              Mr. William Feinberg (11%) - 2/00
                                                                            
   EM - Venture I - Keystone Park                    --                     
                                                                            
   10 Skyline Drive                                  37           7.46        Cohr, Inc. (40%) - 10/03
                                                                              Cold Spring Harbor Laboratories (28%) - 5/00
                                                                              MML Group, Inc. & Ross Printing Co., Inc. (26%) - 1/00
                                                                            
   2005 Cabot Boulevard                             215          10.84        Ecogen (100%) - 3/00
                                                                            
   7 Foster Avenue                                  309          15.50        West Jersey Health System (45%) - 1/00
                                                                              Choice Point Services (35%) - 4/01
                                                                            
   2490 Boulevard of the Generals                   295          14.65        Commonwealth of Pennsylvania (100%) - 6/01
                                                                            
   10 Foster Avenue                                 249          14.82        Dolphin, Inc. (35%) - 6/99
                                                                              Ruttland Homes of New Jersey (29%) - 5/99
                                                                            
   111 Ames Court                                    31           8.21        Centroid, Inc. (45%) - 4/05
                                                                              Alarmguard, Inc. (41%) - 12/00
                                                                              TitleServ, Inc. (11%) - 7/99
                                                                            
   600 Corporate Circle Drive                       173          14.94        Dame Media, Incorporated (100%) - 7/02
                                                                            
   11 Commercial Street                              33           9.74        Shore Pharmeceutical Providers, Inc. (100%) - 6/05
                                                                            
   500 Nationwide Drive                             133          13.02        Conrad M. Siegel, Incorporated (79%) - 12/99
                                                                              David M. Griffith & Associates (21%) - 8/99
                                                                            
   1720 Walton Road                                  38          18.80        Inkine Pharmaceutical (24%) - 1/01
                                                                              CIC Systems (16%) - 2/01
                                                                            
   2110 Tomlynn Street                               19           4.50        Reynolds Metals (100%) - 2/00
                                                                            
   Dabney A-1                                        45          10.87        PDD Pharmaco, Inc. (55%) - 8/04
                                                                              Conquest Communications (45%) - 5/02
                                                                            
   8 Engineers Lane                                  26           8.26        Fonar Corporation (100%) - 2/99
                                                                            
   305 Harper Drive                                  25           7.29        The Jerome Group (100%) - 9/02
                                                                            
   748 Springdale Drive                             216          16.51        Automated Financial System (68%) - 1/99
                                                                              Chester County District Court - (32%) - 1/99
                                                                            
   2404 Park Drive                                   83          12.40        Tracking Systems Corporation (65%) - 3/04
                                                                              Rogers - American Co., Inc. (35%) - 8/00
                                                                            
   2401 Park Drive                                   93          14.17        Federal Deposit Insurance Company (46%) - 6/00
                                                                              Moore Business Forms, Inc. (44%) - 6/99
                                                                              Judy Carhart, M.D. (10%) - 10/01
                                                                            
   19 Engineers Lane                                 17           6.50        First Commercial Asset Management (100%) - 1/03
                                                                            
   5 U.S. Avenue                                     18           3.60        Mcfadden Catering, Inc. (100%) - 12/03
                                                                            
   50 East Clementon Road                           121          39.17        Corestates Financial Corporation (100%) - 10/02
                                                                            
   200 Nationwide Drive                              39          24.00        Fulton Bank (100 %) - 8/03
                                                                            
   5 Foster Avenue                                    -           0.00        Borough of Gibbsboro - Police Station (50%) - 11/02
                                                                            
TOTAL ALL PROPERTIES / WEIGHTED AVG.            162,610         $14.30      
                                                =======          =====
</TABLE>
                                      -26-
<PAGE>

(a)  Calculated by dividing net rentable square feet included in leases signed
     on or before December 31, 1998 at the property by the aggregate net
     rentable square feet of the Property.

(b)  "Total Base Rent" for the twelve months ended December 31, 1998 represents
     base rents received during such period, excluding tenant reimbursements,
     calculated in accordance with generally accepted accounting principles
     (GAAP) determined on a straight-line basis. Tenant reimbursements generally
     include payment of real estate taxes, operating expenses and common area
     maintenance and utility charges.

(c)  "Average Annualized Rental Rate" is calculated as follows: (i) for office
     leases written on a triple net basis, the sum of the annualized contracted
     base rental rates payable for all space leased as of December 31, 1998
     (without giving effect to free rent or scheduled rent increases that would
     be taken into account under GAAP) plus the 1998 budgeted operating expenses
     excluding tenant electricity; and (ii) for office leases written on a full
     service basis, the annualized contracted base rent payable for all space
     leased as of December 31, 1998. In both cases the annualized rental rate is
     divided by the total square footage leased as of December 31, 1998 without
     giving effect to free rent or scheduled rent increases that would be taken
     into account under GAAP.

(d)  The data reflected for these properties are presented on a consolidated
     basis.

(e)  The net rentable square feet for these properties is presented on a
     consolidated basis.

(f)  These properties are under redevelopment and are excluded from the
     percentages for Weighted Average Percentage Leased and Average Annualized
     Rental Rate information.

(g)  This property is subject to a ground lease.

                                      -27-
<PAGE>

                   The table set forth below shows certain information regarding
rental rates and lease expirations for the Properties at December 31, 1998,
assuming none of the tenants exercises renewal options or termination rights, if
any, at or prior to scheduled expirations:

<TABLE>
<CAPTION>
                                                                                        Final           Percentage    
                                              Rentable              Final             Annualized      of Total Final
                            Number of         Square             Annualized          Base Rent          Annualized
        Year of              Leases           Footage            Base Rent           Per Square         Base Rent
         Lease              Expiring         Subject to             Under             Foot Under          Under
       Expiration          Within the        Expiring             Expiring            Expiring           Expiring       Cumulative
      December 31,            Year            Leases             Leases (a)            Leases             Leases           Total
- - ---------------------      ----------     --------------        ------------         -------------     --------------   -----------
<S>       <C>                  <C>           <C>                <C>                    <C>                 <C>              <C>  
          1999                 485           2,846,524          $ 34,633,485           $ 12.17             14.0%            14.0%
          2000                 313           2,456,451            30,135,284             12.27             12.2%            26.2%
          2001                 326           2,822,726            39,112,947             13.86             15.8%            42.0%
          2002                 225           2,448,062            32,683,703             13.35             13.2%            55.2%
          2003                 200           1,529,785            24,890,904             16.27             10.1%            65.2%
          2004                  61             755,774            13,411,960             17.75              5.4%            70.7%
          2005                  52           1,188,875            20,123,516             16.93              8.1%            78.8%
          2006                  21             588,277             7,695,712             13.08              3.1%            81.9%
          2007                  17             532,415             8,109,527             15.23              3.3%            85.2%
          2008                  16             575,855             8,939,694             15.52              3.6%            88.8%
  2009 and thereafter           65           1,715,911            27,771,495             16.18             11.2%           100.0%
                           ----------     --------------       -------------         -------------     --------------

                             1,781          17,460,655         $ 247,508,227            $ 14.18           100.0%
                           ==========     ==============      ==============         =============     ==============
</TABLE>

(a)  "Final Annualized Base Rent" for each lease scheduled to expire represents
     the cash rental rate of base rents, excluding tenant reimbursements, in the
     final month prior to expiration multiplied by 12. Tenant reimbursements
     generally include payment of real estate taxes, operating expenses and
     common area maintenance and utility charges.

         At December 31, 1998, the Properties were leased to 1,357 tenants that
are engaged in a variety of businesses. The following table sets forth
information regarding leases at the Properties with the 20 largest tenants based
upon Annualized Escalated Rent from the Properties as of December 31, 1998:

                                      -28-

<PAGE>

<TABLE>
<CAPTION>
                                                                                                                      Percentage of
                                                              Remaining    Aggregate    Percentage     Annualized       Aggregate
                                                   Number       Lease        Square    of Aggregate     Escalated       Annualized
                                                     of        Term in        Feet        Leased        Rent (in        Escalated
Tenant Name (a)                                    Leases       Months       Leased    Square Feet    thousands) (b)        Rent
- - --------------------------------------------      -------       ------       ------    -----------    --------------   ------------
<S>                                                   <C>       <C>          <C>          <C>           <C>                <C>
State of New Jersey                                   3          (c)         383,616       2.2%         $ 9,954             3.5%
First USA Bank                                       26          (d)         348,133       2.0%           7,324             2.6%
Bell Atlantic                                         9          (e)         393,948       2.3%           7,129             2.5%
General Electric                                      4          (f)         402,867       2.3%           5,616             2.0%
Lockheed Martin                                       8          (g)         389,508       2.2%           4,793             1.7%
Travelers                                             8          (h)         274,010       1.6%           4,731             1.7%
GRC International                                     1          124         166,597       1.0%           4,343             1.5%
Beneficial Corporation                               22          (i)         244,080       1.4%           4,330             1.5%
Penske Truck Leasing                                 12          84          206,634       1.2%           3,820             1.3%
Parsons Corporation                                   4          75          200,000       1.1%           3,677             1.3%
IBM Corporation                                       5          (j)         167,811       1.0%           3,404             1.2%
The Hartford                                          4          (k)         158,961       0.9%           2,902             1.0%
Decision One                                          2          (l)         145,768       0.8%           2,789             1.0%
Nations Bank                                          6          17           82,394       0.5%           2,513             0.9%
Computer Sciences, Corporation                        4          (m)         111,733       0.6%           2,322             0.8%
Centeon Management                                    3          (n)         110,736       0.6%           2,279             0.8%
Kimberly Clark Corporation (Scott Paper)              1          84           93,014       0.5%           2,136             0.7%
Aetna Life Insurance Company                          1          42          104,505       0.6%           1,947             0.7%
Consolidated Rail Corporation (Conrail)               2          (o)          78,210       0.4%           1,894             0.7%
Reliance Insurance Company                            6          (p)          83,979       0.5%           1,845             0.6%
                                                  -------     ----------   ----------  -------------  --------------  -------------

     Consolidated Total/Weighted Average             131         72        4,146,504      23.7%        $ 79,748            28.0%
                                                  =======     ==========   ==========  =============  ==============  =============
</TABLE>
(a)  The identified tenant includes affiliates in certain circumstances.

(b)  Annualized Escalated Rent represents the monthly Escalated Rent for each
     lease in effect at December 31, 1998 multiplied by 12. Escalated Rent
     represents fixed base rental amounts plus pass-throughs of operating
     expenses, including electricity costs. The Company estimates operating
     expenses pass-throughs based on historical amounts and comparable market
     data.

(c)  Consists of three leases: a lease representing 222,987 net rentable square
     feet that expires in September 2009, a lease representing 117,428 net
     rentable square feet that expires in August 2008 and a lease representing
     43,201 net rentable square feet that expires in September 2002.

(d)  Consists of twenty six leases: twenty three leases representing 274,531 net
     rentable square feet that expire in January 2012, two leases representing
     53,894 net rentable square feet that expire in June 2010 and a lease
     representing 19,708 net rentable square feet that expires in September
     2002.

(e)  Consists of nine leases: three leases representing 49,593 net rentable
     square feet that expire in July 2000, a lease representing 172,448 net
     rentable square feet that expires in April 2001, a lease representing
     74,728 net rentable square feet that expires in July 2006, a lease
     representing 17,179 net rentable square feet that expires in October 1999,
     two leases representing 80,000 net rentable square feet that expire in
     November 2003 and a roof lease that expires in February 2001.

(f)  Consists of four leases: a lease representing 132,000 net rentable square
     feet that expires in September 2001, a lease representing 61,102 net
     rentable square feet that expires in September 2003, a lease representing
     208,774 net rentable square feet that expires in December 2007 and a lease
     representing 991 net rentable square feet that expires in June 1999.

(g)  Consists of eight leases: a lease representing 158,000 net rentable square
     feet that expires in September 2002, a lease representing 112,905 net
     rentable square feet that expired in January 1999, a lease representing
     30,280 net rentable square feet that expires in May 1999, a lease
     representing 14,750 net rentable square feet that expires in January 2001,
     a lease representing 13,956 net rentable square feet that expires in
     October 2004, a lease representing 12,498 net rentable square feet that
     expires in June 2002, a lease representing 16,041 net rentable square feet
     that expires in May 2000 and a lease representing 31,078 net rentable
     square feet that expires in April 2002.

(h)  Consists of eight leases: a lease representing 47,067 net rentable square
     feet that expires in February 2002, a lease representing 59,844 net
     rentable square feet that expired in January 1999, three leases that
     represent 47,988 net rentable square feet that expire in December 2001, a
     lease representing 71,312 net rentable square feet that expires in January
     2004 and two leases representing 47,799 net rentable square feet that
     expired in February 1999.

(i)  Consists of twenty two leases: twenty one leases that represent 238,028 net
     rentable square feet in the aggregate that expire in January 2010 and a
     lease representing 6,052 net rentable square feet that expired in January
     1999.
                                      -29-
<PAGE>

(j)  Consists of five leases: a lease representing 17,110 net rentable square
     feet that expires in March 2001, two leases representing 5,692 net rentable
     square feet in the aggregate that expire in October 1999, and two leases
     representing 145,009 net rentable square feet in the aggregate that expire
     in August 1999.

(k)  Consists of four leases: a lease that represents 67,481 net rentable square
     feet that expires in December 2004, two leases that represent 76,480 net
     rentable square feet that expire in December 2007 and a lease that
     represents 15,000 net rentable square feet that expires in May 1999.

(l)  Consists of two leases: a lease representing 109,800 net rentable square
     feet that expires in December 2005 and a lease representing 35,968 net
     rentable square feet that expires in June 2003.

(m)  Consists of four leases: a lease representing 47,176 net rentable square
     feet that expires in May 2002, a lease representing 36,830 net rentable
     square feet that expires in November 2001, a lease representing 15,000 net
     rentable square feet that expires in October 2000 and a lease representing
     12,727 net rentable square feet that expires in August 2003.

(n)  Consists of three leases: two leases that represent 95,361 net rentable
     square feet that expire in October 2002 and a lease that represents 15,375
     net rentable square feet that expires in December 2003.

(o)  Consists of two leases: a lease representing 69,511 net rentable square
     feet that expires in June 2000 and a lease representing 8,699 net rentable
     square feet that expires in September 2001.

(p)  Consists of six leases: two leases representing 68,841 net rentable square
     feet that expire in October 2002, two leases representing 4,907 net
     rentable square feet that expire in January 2003, a lease that represents
     3,848 net rentable square feet that expires in June 2002, and a lease that
     represents 6,383 net rentable square feet that expires in February 2000.

Real Estate Ventures

         Since January 1, 1997, the Company, through the Operating Partnership
and subsidiaries wholly-owned by the Operating Partnership, has entered into
nine Real Estate Ventures.

         On September 19, 1997, the Company acquired a 50% interest in a
newly-formed limited liability company that developed a three-story office
property in Newark, Delaware containing approximately 150,000 net rentable
square feet. Development of this property was completed in May 1998 and Computer
Sciences, Corporation has leased the entire facility through May 31, 2007. The
Company's equity contribution to this company was approximately $2.0 million.
Total project costs were approximately $17.0 million. Project costs have been
financed primarily through a $13.1 million institutional loan.

         On September 19, 1997, the Company also acquired a 50% membership
interest in a newly-formed limited liability company that acquired two parcels
of undeveloped land containing an aggregate of approximately 11 acres in Newark,
Delaware for a purchase price of approximately $1.0 million in anticipation of
the construction on such land of two office buildings. The Company's initial
equity contribution to this company was $1.0 million. Architectural plans for
the development of the land have not been completed and development of the land
is subject to receipt of a construction loan as well as certain land development
and other necessary approvals.

         On November 4, 1997, the Company acquired a 65% general partner
interest in a newly-formed limited partnership that completed development of an
approximately 86,000 net rentable square foot, four-story office building in
West Conshohocken, Pennsylvania during the fourth quarter of 1998. Total project
costs were approximately $17.0 million. The Company's equity contribution to
this partnership was approximately of $5.8 million. Project costs have been
financed primarily through an $11.0 million institutional loan.

         On November 4, 1997, the Company also acquired a 65% general partner
interest in a newly-formed limited partnership that holds an option to purchase
approximately 9.3 acres of undeveloped land in West Conshohocken, Pennsylvania
for approximately $3.2 million. The Company believes this land can accommodate
an office building containing approximately 210,000 net rentable square feet.
The term of

                                      -30-
<PAGE>

the option expires on November 2, 1999. The Company's equity contributions to
this partnership through December 31, 1998 were approximately $1.3 million,
$348,000 of which was used by the limited partnership to acquire the above
referenced option.

         As part of the November 4, 1997 transactions, the Company also acquired
the right to become a 35% general partner in an existing limited partnership
that owns a four-story office property containing approximately 83,000 net
rentable square feet in Conshohocken, Pennsylvania. On May 11, 1998, the Company
acquired such 35% interest for approximately $2.7 million. As of December 31,
1998, this property was fully leased to five tenants.

         On December 31, 1997, the Company acquired a 50% general partner
interest in a newly-formed general partnership that was established to own and
operate a project involving the redevelopment of a building situated on
approximately five acres in Delaware County, Pennsylvania. Redevelopment of the
office building was completed in the first quarter of 1999 for a total cost of
approximately $4.8 million. The Company's equity contribution to this
partnership was approximately $2.6 million. Project costs have been financed
primarily through a $6.0 million institutional loan.

         On February 3, 1998, the Company acquired an approximately 60% economic
interest in a partnership that owns approximately 12.5 acres of land in Plymouth
Meeting, Pennsylvania. The Company believes the land (on which an inn is
currently situated) can accommodate an office building containing approximately
210,000 net rentable square feet. The Company acquired its interest through a
loan and equity contribution aggregating approximately $4.2 million.
Architectural plans for the development of the land have been substantially
completed and development of the land is subject to receipt of a construction
loan, as well as certain land development and other necessary approvals.

         On February 25, 1998, the Company acquired a 50% general partner
interest in a newly-formed general partnership that was established to develop a
three-story office property containing approximately 180,000 net rentable square
feet in Chester County, Pennsylvania. Total project costs are estimated to be
approximately $37.0 million. The Company has agreed to contribute approximately
$5.4 million to the partnership upon receipt of a construction loan.
Architectural plans for the development of the land have been substantially
completed and final land development approval has been received. Development of
the land is subject to receipt of a construction loan.

         On November 30, 1998, the Company acquired a 65% general partnership
interest in a newly-formed limited partnership that intends to develop a
four-story office property in Conshohocken, Pennsylvania. The Company expects
this property to contain approximately 112,000 net rentable square feet upon
completion. The Company has committed to make an equity investment of $6.4
million to the partnership. Total project costs, which the partnership is
financing through a construction loan, are estimated to be approximately $18.7
million, with construction scheduled to be completed during the first quarter of
2000. The Company has guaranteed repayment of that portion of the construction
loan in excess of its equity commitment.

Item 3.  Legal Proceedings

         The Company is involved from time to time in litigation on various
matters, which include disputes with tenants and disputes arising out of
agreements to purchase properties. Given the nature of the Company's business
activities, these lawsuits are considered routine to the conduct of its
business. The result of any particular lawsuit cannot be predicted, because of
the very nature of litigation, the litigation process and its adversarial
nature, and the jury system.

         As of the date of this filing, the Company is a defendant in case in
which the plaintiffs allege that the Company breached its obligation to purchase
a portfolio of properties for approximately $83.0 million. The plaintiffs'
allegations assert claims for reformation, breach of contract, breach of duty of
good faith

                                      -31-
<PAGE>

and fair dealing, fraud, violation of the New Jersey Consumer Fraud Statute and
unjust enrichment. The Company intends to oppose the litigation vigorously. The
Company believes that plaintiff failed to satisfy the conditions precedent to
the Company's obligation to close under the agreement and has moved to dismiss
all of the plaintiff's claims. As of the date of this filing, the court has not
ruled on the Company's motion to dismiss plaintiffs' claims, and discovery has
not commenced.

Item 4.  Submission of Matters to a Vote of Security Holders

         The Company did not submit any matters to a vote of security holders in
the fourth quarter of the fiscal year ended December 31, 1998.

                                     PART II

Item 5.  Market for Registrant's Common Equity and Related Shareholder Matters

         The Common Shares commenced trading on the NYSE under the symbol "BDN"
on October 21, 1997. Prior to October 21, 1997, the Common Shares were traded on
the American Stock Exchange ("AMEX"). On March 23, 1999, there were
approximately 317 holders of record of the Common Shares. On March 23, 1999, the
last reported sale price of the Common Shares on the NYSE was $16 5/8. The
following table sets forth the quarterly high and low closing sale price per
share reported on the AMEX for the indicated periods through October 20, 1997
and on the NYSE for the indicated periods subsequent to October 20, 1997 and the
distributions paid by the Company with respect to each such period.

                          Share Price      Share Price        Distributions
                             High              Low         Declared For Quarter
                             ----              ---         --------------------

First Quarter 1997         $22               $19 3/8            $0.35
Second Quarter 1997        $20 3/4           $18 3/8            $0.36
Third Quarter 1997         $23 15/16         $20 1/4            $0.36
Fourth Quarter 1997        $25 1/8           $22 7/8            $0.37

First Quarter 1998         $26 3/8           $23 1/16           $0.37
Second Quarter 1998        $24 5/16          $21 1/16           $0.38
Third Quarter 1998         $23 1/8           $16 1/4            $0.38
Fourth Quarter 1998        $19               $16 1/4            $0.39

         Future distributions by the Company will be at the discretion of the
Board of Trustees and will depend on the actual cash flow of the Company, its
financial condition, capital requirements, the annual distribution requirements
under the REIT provisions of the Internal Revenue Code of 1986 and such other
factors as the Board of Trustees deems relevant.

         Summarized below is information regarding the sale by the Company of
securities during 1998 and through the date of this Annual Report on Form 10-K
that were not registered under the Securities Act of 1933.

         During 1998, the Company issued an aggregate of 303,821 Common Shares
upon the redemption of 303,821 Class A Units: January 1, 1998 (252,387 Common
Shares); June 22, 1998 (50,000 Common Shares); and June 30, 1998 (1,434 Common
Shares). The redemptions were effected by the Company in accordance with the
Amended and Restated Agreement of Limited Partnership of the Operating
Partnership, as amended (the "Partnership Agreement"), and no cash proceeds were
received by the Company in connection with such redemptions.

                                      -32-
<PAGE>

         On May 20, 1998, the Company issued an aggregate of 1,248 Common Shares
to three members of the Company's Board of Trustees in payment of one-half of
the annual trustee fee payable to non-employee Trustees of the Company.

         On September 28, 1998, the Company issued 750,000 shares of the
Company's 7.25% Series A Cumulative Convertible Preferred Shares of Beneficial
Interest ("Series A Preferred Shares"), which are currently convertible into
1,339,285 Common Shares, as part of the acquisition price for the Lazard
Portfolio.

         As partial consideration for the purchase price of certain property
acquisitions on the following dates during 1998, the Operating Partnership
issued an aggregate of 1,754,763 Class A Units which are exchangeable for an
equal number of Common Shares: March 31, 1998 (153,036 Class A Units); May 8,
1998 (390,364 Class A Units); October 6, 1998 (1,127,895 Class A Units); and
December 31, 1998 (83,468 Class A Units).

         On September 28, 1998, the Operating Partnership issued an aggregate of
1,550,000 Series B Preferred Units which after September 27, 1999 will be
convertible into 2,767,857 Common Shares as part of the acquisition for the
Lazard Portfolio.

         If the market price of the Common Shares does not exceed $23.00 during
the 60-day trading day period ending on December 31, 2002, then the Series A
Preferred Shares and Series B Preferred Units, if not previously converted, will
become convertible into an aggregate of 1,415,094 and 2,924,528 Common Shares,
respectively.

         No underwriter was involved in connection with the foregoing securities
issuances, which were exempt from registration pursuant to Section 4(2) of the
Securities Act of 1933, as transactions not involving public offerings.

                                      -33-
<PAGE>

Item 6.  Selected Financial Data

(in thousands, except per Common Share data and number of properties)

<TABLE>
<CAPTION>
Year Ended December 31,                                        1998             1997          1996          1995           1994
                                                     -----------------------------------------------------------------------------
<S>                                                          <C>              <C>            <C>            <C>           <C>
Operating Results
Total revenue                                                $ 192,861        $ 61,060      $ 10,030       $ 3,666        $ 4,192
Income (loss) from continuing operations                        33,025          15,001          (162)         (824)        (1,841)
Income (loss) from continuing operations -
   Per Common Share-Basic                                         0.90            0.96         (0.44)        (1.33)         (0.64)
Income (loss) from continuing operations -
   Per Common Share-Diluted                                       0.89            0.95         (0.44)        (1.33)         (0.64)
Cash distributions declared per Common Share                      1.52            1.44          0.82          1.65           4.71

Balance Sheet Data
Real estate investments, net of
   accumulated depreciation                                $ 1,840,618       $ 563,557     $ 151,901      $ 13,709       $ 13,948
Total assets                                                 1,911,680         621,481       178,326        17,105         17,873
Total indebtedness                                           1,000,560         163,964        36,644         8,931          6,899
Total liabilities                                            1,040,828         181,576        43,558         9,761          8,684
Minority interest                                              127,198          14,377         6,398             -              -
Convertible preferred shares                                    37,500               -        26,444             -              -
Beneficiaries' equity                                          706,154         425,528       101,926         7,344          9,189

Other Data
Funds from Operations                                         $ 84,569        $ 30,035       $ 2,589         $ 537         $ (533)
Cash flows provided by (used in):
   Operating activities                                         69,241          33,572         2,568           497           (628)
   Investing activities                                       (898,337)       (418,256)      (35,401)         (701)         9,559
   Financing activities                                        812,729         395,847        50,272          (722)        (9,635)

Property Data
Number of properties owned at period end                           272             117            37             4              4
</TABLE>

Item 7.  Management's Discussion and Analysis of Financial Condition and
         Results of Operations

         The following discussion should be read in conjunction with the
financial statements appearing elsewhere herein. The results of operations,
liquidity and capital resources and cash flows of the Company include the
historical results of operations of the Properties held by the Company during
the years ended December 31, 1998, 1997 and 1996. This Annual Report on Form
10-K contains forward-looking statements for purposes of the Securities Act of
1933 and the Securities Exchange Act of 1934 and as such may involve known and
unknown risks, uncertainties and other factors that may cause the actual
results, performance or achievements of the Company to be materially different
from future results, performance or achievements expressed or implied by such
forward-looking statements. Although the Company believes that the expectations
reflected in such forward-looking statements are based upon reasonable
assumptions, there can be no assurance that these expectations will be realized.

OVERVIEW

         The Company believes it has established an effective platform in the
Suburban Philadelphia, Pennsylvania market that provides a foundation for
achieving the Company's goal of maximizing market penetration and operating
economies of scale. The Company believes this platform provides a basis to
continue its penetration into additional targeted markets in the Mid-Atlantic
United States through strategic transactions structured to increase cash
available for distribution and maximize shareholder value.

                                      -34-
<PAGE>

         The Company continued its growth in 1998 by purchasing 153 office,
industrial and mixed-use properties containing approximately 11.6 million net
rentable square feet for an aggregate purchase price of approximately $1.3
billion. The 1998 acquisitions expanded the Company's market share in the
Suburban Philadelphia Office and Industrial Market and expanded the Company's
market presence into several other markets within the Mid-Atlantic Region. The
acquisitions occurred throughout the year through 12 separate transactions.
Three of the 12 transactions aggregated approximately $966.0 million of the $1.3
billion aggregate purchase price of all the 1998 acquisitions. The first of the
three transactions, which closed on January 5, 1998, was a $229.1 million
portfolio purchase of 23 properties containing approximately 2.0 million net
rentable square feet. The portfolio strengthened the Company's market share in
the Philadelphia suburbs and established operating platforms in Northern New
Jersey, Delaware and Maryland. The second major portfolio acquisition closed on
March 31, 1998. This portfolio, which was acquired for $137.8 million, contained
six properties containing approximately 933,000 net rentable square feet and
established the Company's market presence in Central New Jersey. The third major
portfolio acquisition closed on September 28, 1998 and significantly broadened
the Company's holdings by adding 66 properties, containing approximately 5.5
million square feet, located in the Philadelphia suburbs; southern New Jersey;
Allentown, Pennsylvania; Richmond, Virginia; and Northern Virginia. The
aggregate purchase price was approximately $599.1 million. The remainder of the
1998 acquisitions increased the Company's market share in suburban Philadelphia
and expanded the Company's presence in the Wilmington, Delaware; Harrisburg,
Pennsylvania; Northern New Jersey; and Long Island, New York markets.

         The Company completed the development of three properties in 1998
containing approximately 288,177 net rentable square feet. The Company also sold
an office property located in Ohio containing approximately 156,175 net rentable
square feet for a net sales price of approximately $14.7 million. As of December
31, 1998, the Company's portfolio consisted of 201 office properties, 70
industrial properties and one mixed use property totaling approximately 18.8
million net rentable square feet.

         The 1998 acquisitions were financed through a combination of: proceeds
received from four public offerings of an aggregate of approximately 13.3
million Common Shares which raised net proceeds of approximately $301.0 million;
borrowings under the Company's credit facilities; the issuance of approximately
1.8 million Class A Units in the Operating Partnership valued at approximately
$41.0 million; the issuance of 1,550,000 Series B Preferred Units with an
aggregate stated value of $77.5 million; and the issuance of 750,000 Series A
Preferred Shares with an aggregate stated value of $37.5 million.

         The Company receives income primarily from rental revenue (including
tenant reimbursements) from the Properties and, to a lesser extent, from the
management of certain properties owned by third parties. The Company expects
that revenue growth in the next two years will result primarily from rent
increases in its current portfolio, as well as from additional acquisitions.

RESULTS OF OPERATIONS

Comparison of the Year Ended December 31, 1998 to the Year Ended
December 31, 1997

         Net income before extraordinary item for the year ended December 31,
1998 was $35.0 million compared with net income before extraordinary item of
$15.0 million for the corresponding period in 1997. The increase in net income
was primarily attributable to the operating results contributed by the 235
properties acquired from January 1, 1997 through December 31, 1998.

                                      -35-
<PAGE>

         Revenues, which include rental income, recoveries from tenants and
other income, increased from $61.1 million for the year ended December 31, 1997
to $192.9 million for the corresponding period in 1998. The increase was
primarily a result of property acquisitions and, to a lesser extent, increased
occupancy. The impact of straight-line rent adjustments increased revenues by
$6.3 million for the year ended December 31, 1998 and $1.7 million for the year
ended December 31, 1997.

         Property operating expenses, depreciation and amortization and
management fees increased from $38.0 million for the year ended December 31,
1997 to $117.2 million for the corresponding period in 1998. The increase was
primarily a result of property acquisitions.

         Property level operating income for the 117 properties owned as of
December 31, 1997 increased from $38.6 million for the year ended December 31,
1997 to $40.6 million for the corresponding period in 1998, an increase of 5.2%.
Occupancy for these 117 properties increased from 91% to 95% driving revenue
growth of 5.0% and causing expenses to increase by 4.7%.

         During the year ended December 31, 1998, 91 leases representing 516,652
square feet of office and industrial space commenced at an average rate per
square foot of $15.47, which was 13.8% higher than the average rate per square
foot on the expired leases.

         Interest expense increased from $7.1 million for the year ended
December 31, 1997 to $36.9 million for the corresponding period in 1998. The
increase in interest expense was primarily a result of additional indebtedness
incurred to finance certain of the Company's acquisitions.

         Administrative expenses increased from $0.7 million for the year ended
December 31, 1997 to $1.7 million for the corresponding period in 1998. This
increase was primarily a result of management and staffing additions to support
the Company's growth.

         Minority interest primarily represents the portion of the Operating
Partnership which is not owned by the Company.

Comparison of the Year Ended December 31, 1997 to the Year Ended
December 31, 1996

         Net income for the year ended December 31, 1997 was $15.0 million
compared with a net loss of $162,000 for the corresponding period in 1996. The
increase in net income was primarily attributable to the operating results
contributed by the 112 properties acquired from August 22, 1996 through December
31, 1997, and to a lesser extent attributable to a 1.9% increase in occupancy
from 1996 to 1997 at properties owned on December 31, 1996.

         Revenues increased by $51.0 million for the year ended December 31,
1997 as compared to the corresponding prior year period primarily as a result of
property acquisitions and, to a lesser extent, increased occupancy.

         Property operating expenses, depreciation and amortization and
management fees increased in the aggregate by $31.5 million for the year ended
December 31, 1997 as compared with the prior year period primarily as a result
of property acquisitions. Interest expense increased by $4.3 million as a result
of additional indebtedness incurred to finance certain of the Company's
acquisitions.

LIQUIDITY AND CAPITAL RESOURCES

Cash Flows

         During the year ended December 31, 1998, the Company generated $69.2
million in cash flow from operating activities. Other sources of cash flow
consisted of (i) $566.0 million in net additional borrowings under the Company's
credit facilities, (ii) $301.0 million in net proceeds from share issuances,
(iii) $14.7 million from a property sale and (iv) $19.3 million in additional
mortgage notes payable. During the year ended December 31, 1998, the Company
used its cash to (i) finance the cash portion ($878.5 million) of the
acquisition cost of 153 properties, (ii) repay borrowings under its credit
facilities of $808.4 million, (iii) invest $5.0 million in unconsolidated real
estate ventures, (iv) fund capital expenditures and leasing commissions of $26.3
million, (v) pay distributions to shareholders and minority

                                      -36-
<PAGE>

partners in the Operating Partnership totaling $52.4 million, (vi) repay
mortgage notes payable of $14.7 million, (vii) pay other debt costs of $4.9 
million and (viii) repurchase Common Shares for $1.7 million.

Capitalization

         During the first quarter of 1998, the Company refinanced its $150.0
million secured credit facility ("1997 Credit Facility") with a $330.0 million
unsecured credit facility (the "1998 Credit Facility"). The interest rate was
reduced by 37.5 to 60 basis points depending on the Company's degree of
leverage. Approximately $858,000 of unamortized deferred financing costs related
to the 1997 Credit Facility were expensed in the first quarter of 1998 and were
classified as an extraordinary item on the statement of operations.

         During the second quarter of 1998, the Company entered into an
additional $150.0 million unsecured credit facility (the "Additional Facility")
to facilitate certain of the Company's property acquisitions. The interest rate
on the Additional Facility was equal to LIBOR plus 150 basis points or, at the
Company's option, the Prime Rate plus 25 basis points. Amounts repaid under the
Company's Additional Facility were not subject to reborrowing.

         During the third quarter of 1998, the Company replaced the 1998 Credit
Facility with a $550.0 million unsecured credit facility (the "New 1998 Credit
Facility"). The interest rate borne on the New 1998 Credit Facility was LIBOR
plus 150 basis points initially, subject to certain adjustments based on the
Company's leverage. The New 1998 Credit Facility matures in September 2001.
Approximately $1.1 million of unamortized deferred financing costs related to
the 1998 Credit Facility were expensed in the third quarter of 1998 and were
classified as an extraordinary item on the statement of operations.

         Also during the third quarter of 1998, the Company replaced the
Additional Facility with the New Additional Facility with a borrowing capacity
of $150.0 million. The New Additional Facility bears interest at LIBOR plus 200
basis points and is payable in full on March 31, 1999.

         As of December 31, 1998, the Company had approximately $1.0 billion of
debt outstanding, consisting of mortgage loans totaling $319.2 million and
borrowings under the New 1998 Credit Facility and the New Additional Facility
totaling $681.3 million. The mortgage loans mature between January 1999 and July
2027. As of December 31, 1998, the Company had $18.7 million of availability
remaining under the New 1998 Credit Facility and had no remaining availability
under the New Additional Facility. For the year ended December 31, 1998, the
weighted average interest rate under the Company's credit facilities was 7.05%,
and the weighted average interest rate for borrowings under mortgage notes
payable was 7.63%.

         In January 1999, the Company obtained a $119.0 million, five year loan
from two financial institutions. The loans have a fixed interest rate of 7.18%
and are secured by four properties. The proceeds were used to reduce the New
Additional Facility by $80.0 million and to fund working capital. 

         In March 1999, the Company obtained a $75.0 million, three year loan.
The loan has a floating interest rate of LIBOR plus 250 basis points and is
secured by five properties. The net proceeds were primarily used to repay the
remaining $70.0 million borrowed under the New Additional Facility.

         As of December 31, 1998, the Company's debt to market capitalization
ratio was 54.8%. As a general policy, the Company intends, but is not obligated,
to adhere to a policy of maintaining a long-term average debt to market
capitalization ratio of no more than 50%. The Company expects to reduce its
current leverage through a combination of asset sales, formation of joint
venture transactions and the issuance of preferred securities in the next six to
twelve months.

                                      -37-
<PAGE>

         During the year ended December 31, 1998, the Company sold an aggregate
13.3 million Common Shares for net proceeds of approximately $301.0 million
pursuant to four public offerings. The proceeds were contributed to the
Operating Partnership in exchange for 13.3 million units of general partnership
interest in the Operating Partnership.

          During the third quarter of 1998, the Company's Board of Trustees
authorized a share repurchase program allowing the Company to repurchase up to
2,000,000 of its outstanding Common Shares. No time limit has been placed on the
duration of the share repurchase program. During the third quarter of 1998, the
Company repurchased 86,744 of its Common Shares from the public at share prices
ranging from $17.75 per share to $20.125 per share for a total purchase price of
approximately $1.7 million. The repurchased shares remain authorized, but are no
longer issued and outstanding.

         During the year ended December 31, 1998, as consideration for certain
of the Company's property acquisitions, (i) the Operating Partnership issued
1,550,000 Series B Preferred Units with a stated value of $77.5 million, (ii)
the Operating Partnership issued 1,754,763 Class A Units with an aggregate value
of approximately $41.0 million and (iii) the Company issued 750,000 Series A
Preferred Shares with a stated value of $37.5 million, the proceeds of which
were contributed by the Company to the Operating Partnership in exchange for
750,000 Series A Preferred Mirror Units.

Short and Long Term Liquidity

         The Company believes that its cash flow from operations and current
financing alternatives are adequate to fund its short-term liquidity
requirements for 1999. Cash flow from operations is generated primarily from
rental revenues and operating expense reimbursements from tenants and management
services income from the provision of services to third parties. The Company
intends to use these funds to meet its principal short-term liquidity needs,
which are to fund operating expenses, debt service requirements, recurring
capital expenditures, tenant allowances, leasing commissions and the minimum
distribution required to maintain the Company's REIT qualifications under the
Internal Revenue Code. During the first quarter of 1999, the Company used the
net proceeds from two secured financings to repay the balance of the New
Additional Facility and for other working capital requirements.

         On December 18, 1998, the Board of Trustees declared a quarterly
dividend distribution of $0.39 per share, paid on January 15, 1999 to
shareholders of record as of December 28, 1998. The increase from $0.38 to $0.39
in the fourth quarter was the seventh increase during the past ten quarters.
Total distributions for 1998 were $1.52 per share compared to $1.44 in 1997,
representing an increase of over 5.6%.

         As of December 31, 1998, the Company had entered into guaranties, and
agreements contemplating the provision of guaranties, for the benefit of
unconsolidated real estate ventures, aggregating approximately $16.8 million.
Payment under these guaranties would constitute loan obligations of, or
preferred equity positions in, the applicable unconsolidated real estate
venture.

         The Company expects to meet its long-term liquidity requirements, such
as for property acquisition, development, investments in unconsolidated real
estate ventures, scheduled debt maturities, renovations, expansions and other
non-recurring capital improvements, through borrowings under the New 1998 Credit
Facility and other long-term secured and unsecured indebtedness and the issuance
of additional Class A Units and other equity securities.

Funds from Operations

         Management generally considers Funds from Operations ("FFO") as one
measure of REIT performance. FFO is calculated as net income (loss) adjusted for
depreciation expense attributable to real property, amortization expense
attributable to

                                      -38-
<PAGE>

capitalized leasing costs, gains on sales of real estate investments and
extraordinary and nonrecurring items and comparable adjustments for real estate
ventures accounted for using the equity method. Management believes that FFO is
a useful disclosure in the real estate industry, however, the Company's
disclosure may not be comparable to other REIT's. FFO should not be considered
an alternative to net income as an indication of the Company's operating
performance or to operating cash flows as a measure of liquidity.

         FFO for the years ended December 31, 1998 and 1997 is summarized in the
following table (in thousands, except share data).

<TABLE>
<CAPTION>
                                                                                    Year ended December 31,
                                                                               -----------------------------------
                                                                                    1998               1997
                                                                               ----------------   ----------------
<S>                                                                                   <C>                <C>     
   Income before gains on sale, minority interest and extraordinary item              $ 37,246           $ 15,377
   Add (Deduct):
     Depreciation attributable to real property                                         45,032             13,966
     Amortization attributable to leasing costs                                          2,036                708
     Depreciation attributable to real estate ventures                                     255                (16)
                                                                               ----------------   ----------------
   Funds from Operations before minority interest                                     $ 84,569           $ 30,035
                                                                               ================   ================
   Weighted average Common Shares (including common
     share equivalents) and Operating Partnership units                             38,340,594         16,175,258
                                                                               ================   ================
</TABLE>

Year 2000 Compliance

         The Year 2000 compliance issue concerns the inability of computerized
information systems to accurately calculate, store or use a date after 1999.
This could result in a system failure or miscalculations causing disruptions of
operations. The Year 2000 issue affects virtually all companies and all
organizations. The Company recognizes the importance of ensuring that its
business operations are not disrupted as a result of Year 2000 related computer
system and software issues.

         The Company is currently upgrading its internal computer information
systems as a normal part of its business. During this conversion, the Company
will assess the new hardware and software systems for Year 2000 compliance. The
Company expects to complete its conversion by June 30, 1999 at an estimated cost
of $250,000. The planned conversion was not accelerated, nor were incremental
costs incurred as a result of the Year 2000 issue.

         The Company is currently evaluating and assessing those computer
systems that do not relate to information technology (such as systems designed
to operate a building, which typically include embedded technology), including,
without limitation, its telecommunication systems, security systems (such as
card-access door lock systems), energy management systems, sprinkler systems and
elevator systems. The Company's Year 2000 compliance program is being centrally
coordinated, but involves all property management personnel. For each of the
Company's properties, compliance letters have been sent to the manufacturers of
key operational systems, third-party service providers and vendors. In the event
a satisfactory response is not received, the Company intends to consider
changing service providers, testing systems for compliance, replacing systems,
or pursuing alternative measures to ensure Year 2000 compliance. This assessment
is approximately 50% complete for properties owned by the Company as of December
31, 1998. The total cost of bringing these internal systems and equipment into
Year 2000 compliance has not been quantified. The Company is unable to
determine, based on available information, whether these costs will have a
material adverse effect on its business, financial condition or results of
operations.

         The Company expects to be Year 2000 compliant by June 30, 1999. The
Company is currently evaluating the consequences of a potential failure to
remediate these matters on time and is in the process of developing contingency
plans regarding these matters. The Company expects to have such contingency


                                      -39-
<PAGE>

plans in place by June 30, 1999. Under a most reasonably likely worst case
scenario, until systems became operational, the Company would resort to a
combination of temporary hiring, operational system repair or replacement and
alternative software to process normal accounts and financial information.

         Further, no estimates have been made as to any potential adverse impact
resulting from the failure of third-party service providers (including, without
limitation, its banks, its payroll processor and its telecommunications
providers) vendors and tenants to prepare for the Year 2000. The Company is
attempting to identify those risks that could have a material impact on the
Company's operations by June 30, 1999 and is also attempting to receive
compliance certificates from all third-parties that could have a material impact
on the Company's operations by June 30, 1999. Although the Company is in the
process of working with such third-parties in order to attempt to eliminate its
Year 2000 concerns the cost to the Company of the third-party Year 2000
compliance has not been quantified. The Company would consider changing to
third-party service providers and vendors who are Year 2000 compliant before
incurring any significant additional costs.

         To date, the Company has not expended significant funds to assess its
Year 2000 issues, as the Company's evaluation of its Year 2000 concerns has been
conducted by its own personnel at routine staffing levels and without any
out-of-pocket expenses for consultants. The Company's evaluation has not been
subject to any independent verification or review process.

Inflation

         A majority of the Company's leases provide for separate escalations of
real estate taxes and operating expenses either on a triple net basis or over a
base amount. In addition, many of the office leases provide for fixed base rent
increases or indexed escalations (based on the CPI or other measure). The
Company believes that inflationary increases in expenses will be significantly
offset by the expense reimbursement and contractual rent increases.

Interest Rate Risk and Sensitivity Analysis

         The analysis below presents the sensitivity of the market value of the
Company's financial instruments to selected changes in market rates. The range
of changes chosen reflects the Company's view of changes which are reasonably
possible over a one-year period. Market values are the present value of
projected future cash flows based on the market rates chosen.

         The Company's financial instruments consist of both fixed and
variable rate debt. As of December 31, 1998, the Company's consolidated debt
portfolio consists of $241.7 million fixed rate mortgages with maturities
through 2027, $77.5 million in floating rate mortgage notes, and $681.3
million borrowed under its credit facilities. All financial instruments entered
into for other than trading purposes and the net market value of these financial
instruments is referred to as the net financial position. Changes in interest
rates have different impacts on the fixed and variable rate portions of the
Company's debt portfolio. A change in interest rates on the fixed portion of the
debt portfolio impacts the net financial instrument position but has no impact
on interest incurred or cash flows. A change in interest rates on the variable
portion of the debt portfolio impacts the interest incurred and cash flows but
does not impact the net financial instrument position.

         The sensitivity analysis related to the fixed portion of the Company's
debt portfolio assumes an instantaneous 100 basis point move in interest rates
from their actual levels at December 31, 1998 with all other variables held
constant. As of December 31, 1998, a 100 basis point increase in market interest
rates would result in a decrease in the net financial instrument position of
$22.3 million and a 100 basis point decrease in market interest rates would
result in an increase in the net financial instrument position of $11.7 million.


                                      -40-
<PAGE>

         Based on the variable-rate debt included in the Company's debt
portfolio on December 31, 1998, a 100 basis point increase in interest rates
would result in an additional $7.6 million in interest incurred per year and a
100 basis point decline would reduce interest incurred by $7.6 million per year.

Item 7A.  Quantitative and Qualitative Disclosure About Market Risk

     See discussion in Management's Discussion and Analysis included in Item 7
herein.

Item 8.  Financial Statements and Supplementary Data

     The financial statements and supplementary financial data are listed under
Item 14(a) and filed as part of this Annual Report on Form 10-K. See Item 14.

Item 9.  Changes in and Disagreements with Accountants on Accounting and
         Financial Disclosure

     None.

                                    PART III

Item 10.  Trustees and Executive Officers of the Registrant

         The following table sets forth certain information with respect to the
officers, significant employees and Trustees of the Company:

<TABLE>
<CAPTION>
           Name               Age              Position
           ----               ---              --------
<S>                           <C>   <C>
Anthony A. Nichols, Sr.       59    Chairman of the Board and Trustee
Gerard H. Sweeney             42    President, Chief Executive Officer and Trustee
Jeffrey F. Rogatz             37    Senior Vice President and Chief Financial Officer
Anthony S. Rimikis            50    Senior Vice President--Development and Construction
John M. Adderly, Jr.          38    Senior Vice President--Operations
Brad A. Molotsky              34    General Counsel and Secretary
Barbara L. Yamarick           46    Vice President--Tenant Services and Property Mgmt.
H. Jeffrey DeVuono            33    Vice President--Operations
Mark W. Hamer                 34    Vice President--Operations
Anthony A. Nichols, Jr.       32    Vice President--Operations
George D. Sowa                39    Vice President--Operations
Donald E. Axinn               69    Trustee
Walter D'Alessio              65    Trustee
Murry N. Gunty                30    Trustee
Warren V. Musser              72    Trustee
Charles P. Pizzi              48    Trustee
</TABLE>

         The following are biographical summaries of the officers, significant
employees and Trustees of the Company:

         Anthony A. Nichols, Sr., Chairman of the Board and Trustee. Mr. Nichols
was elected Chairman of the Board on August 22, 1996. Mr. Nichols founded The
Nichols Company, a private real estate development company ("TNC"), through a
corporate joint venture with Safeguard Scientifics, Inc. ("SSI") and was
President and Chief Executive Officer of TNC from 1982 through August 22, 1996.
From 1968 to

                                      -41-
<PAGE>

1982, Mr. Nichols was Senior Vice President of Colonial Mortgage Service Company
(now GMAC Mortgage Corporation), a subsidiary of CoreStates Bank, N.A. Mr.
Nichols has been a member of the National Association of Real Estate Investment
Trusts ("NAREIT"), a member of the Board of Governors of the Mortgage Banking
Association and Chairman of the Income Loan Committee of the regional Mortgage
Bankers Association. Mr. Nichols also serves on the Board of Directors of
CenterCore Inc. and is a member of the National Association of Industrial and
Office Parks ("NAIOP"), the Philadelphia Board of Realtors and the Urban Land
Institute ("ULI").

         Gerard H. Sweeney, President, Chief Executive Officer and Trustee. Mr.
Sweeney was elected a Trustee on February 9, 1996. Mr. Sweeney has served as
President and Chief Executive Officer of the Company since August 8, 1994 and as
President since November 9, 1989. In addition to his role with the Company,
prior to August 8, 1994, Mr. Sweeney served as Vice President of LCOR,
Incorporated ("LCOR"), a real estate development firm. Mr. Sweeney was employed
by The Linpro Company (a predecessor of LCOR) from 1983 to 1994 and served in
several capacities, including Financial Vice President and General Partner. Mr.
Sweeney is a member of NAREIT, the ULI, the American Institute of Certified
Public Accountants ("AICPA") and the Pennsylvania Institute of Certified Public
Accountants ("PICPA").

         Jeffrey F. Rogatz, Senior Vice President and Chief Financial Officer.
Mr. Rogatz became Senior Vice President and Chief Financial Officer of the
Company on January 19, 1999. Prior to joining the Company, Mr. Rogatz was
employed for over 11 years as an investment banker with Legg Mason Wood Walker,
Inc. ("Legg Mason") and most recently served as a managing director in the
corporate finance group. Mr. Rogatz served as the lead investment banker from
Legg Mason in advising Brandywine on capital markets transactions including
seven public offerings which raised in excess of $650 million. Mr. Rogatz is a
member of NAREIT, the International Council of Shopping Centers and the Urban
Land Institute, and currently serves on the Board of Governors at Goodwill
Industries of the Chesapeake.

         Anthony S. Rimikis, Senior Vice President--Development and
Construction. Mr. Rimikis became an executive of the Company on October 13,
1997. From January 1994 until October 1997, Mr. Rimikis served as Vice President
of Emmes Realty Services, Inc., a New York based real estate services company
where he managed the company's construction and development activities in New
Jersey and Maryland. Prior to joining Emmes, he served as Vice President of
Development for DKM Properties Corp. from 1988 to 1994.

         John M. Adderly, Jr., Senior Vice President--Operations. Mr. Adderly
has served as an officer of the Company since January 1995. Mr. Adderly was
employed by the Rodin Group, a Philadelphia-based real estate development,
management and brokerage firm from 1982 until 1995, where he served as Vice
President and Chief Financial Officer from 1986 until 1995, and as Corporate
Controller from 1982 until 1986. Mr. Adderly serves on the Jefferson Bank
Advisory Council and is a member of the Board of Directors of Businesses
Committed to Burlington County.

         Brad A. Molotsky, General Counsel and Corporate Secretary. Mr. Molotsky
became General Counsel of the Company on October 27, 1997 and Secretary of the
Company on November 18, 1997. Prior to joining the Company he was an associate
at Pepper Hamilton LLP, Philadelphia, Pennsylvania where he practiced law since
September 1989. Mr. Molotsky is a member of NAIOP, NAREIT, the American Society
of Corporate Secretaries, the American Bar Association, the New Jersey Bar
Association and the Pennsylvania Bar Association. He also serves on the Board of
Directors of Philadelphia Volunteer Lawyers for the Arts, Triple Threat
Productions, Inc. and Businesses Committed to Burlington County.

         Barbara L. Yamarick, Vice President--Tenant Services and Property
Management. Ms. Yamarick joined the Company on October 20, 1997. Prior to
joining the Company she was a Regional Vice President of Premisys Real Estate
Services, Inc., a subsidiary of Prudential Insurance Company engaged in the
management and leasing of real estate, which she joined in 1991.

                                      -42-
<PAGE>

         H. Jeffrey DeVuono, Vice President--Operations. Mr. DeVuono became an
officer of the Company on January 15, 1997. From January 1993 until that time he
was employed in several capacities by LCOR, Incorporated, a real estate
development firm. During Mr. DeVuono's employment at LCOR, he was responsible
for asset management and marketing for LCOR's western Philadelphia suburban
properties.

         Mark W. Hamer, Vice President--Operations. Mr. Hamer became an officer
of the Company on October 6, 1998. Prior to joining the Company, he was
President and Chief Operating Officer of Donald E. Axinn Companies, a Long
Island-based real estate company. Previously from 1991 to 1996, Mr. Hamer served
as Vice President for the North Fork Bank in Melville, N.Y. At North Fork Bank,
he assisted in forming and managing the special asset department. From 1989 to
1991, Mr. Hamer was employed at Nations Bank, N.A. Mr. Hamer also serves as a
trustee of the Nature Conservancy - Long Island Chapter.


         Anthony A. Nichols, Jr., Vice President--Operations. Mr. Nichols became
an officer of the Company on August 22, 1996. Previously Mr. Nichols was
employed at TNC, which he joined in 1989 as a marketing representative. In 1992
Mr. Nichols became an Assistant Vice President--Property Management of TNC and
in 1995 he became Vice President--Marketing. Mr. Nichols is a member of the
Board of Directors for the Eastern Pennsylvania Region of the NAIOP. Mr. Nichols
is the son of Anthony A. Nichols, Sr., the Company's Chairman of the Board.

         George D. Sowa, Vice President--Operations. Mr. Sowa became an officer
of the Company on April 13, 1998. Mr. Sowa was employed by Keating Development
Company from 1997 to 1998 as a Development Manager where he was responsible for
the development and financing of a $51 million redevelopment project in Central
New Jersey. Mr. Sowa was employed by LCOR, Incorporated as Director of
Development / Operations from 1989 to 1997. At LCOR, Mr. Sowa was responsible
for development, leasing and operations of LCOR's Central New Jersey office
retail portfolio. Mr. Sowa is a member of the Society of College and University
Planners, NAIOP and the Middlesex Somerset Mercer (MSM) Regional Council.


         Donald E. Axinn, Trustee. Mr. Axinn was elected a Trustee on October 6,
1998. Mr. Axinn was the founder and chairman of the Donald E. Axinn Companies,
developers of office and industrial parks throughout the New York metropolitan
area.

         Walter D'Alessio, Trustee. Mr. D'Alessio was elected a Trustee on
August 22, 1996. He has served as President and Chief Executive Officer of Legg
Mason Real Estate Services, Inc., a mortgage banking firm headquartered in
Philadelphia, Pennsylvania since 1982. Previously, Mr. D'Alessio served as
Executive Vice President of the Philadelphia Industrial Development Corporation
and Executive Director of the Philadelphia Redevelopment Authority. He also
serves on the Board of Directors of PECO Energy Company, Pennsylvania Blue
Shield and Independence Blue Cross, Philadelphia Beltline Railroad, the
Philadelphia Private Industry Council and the Greater Philadelphia Chamber of
Commerce.

         Murry N. Gunty, Trustee. Mr. Gunty was elected a Trustee on September
28, 1998. Mr. Gunty serves as principal and member of the senior investment team
of Lazard Freres Real Estate Investors, L.L.C. ("LFREI) and a manager of realty
investment funds. Mr. Gunty also serves on the Board of Directors of ARV
Assisted Living, Atria Senior Quarters, Cliveden plc, the Fortress Group, Inc.,
Konover Property Trust, Intown Suites, Inc., and the Rubenstein Company.


         Warren V. Musser, Trustee. Mr. Musser was elected a Trustee on August
22, 1996. He has served as Chairman and Chief Executive Officer of SSI since
1953. Mr. Musser also serves as the Chairman of the Board of Directors of
Cambridge Technology Partners, Inc., and is a director of Coherent
Communications Systems Corporation, CompuCom Systems, Inc. and National Media
Corp. Mr. Musser also serves on a variety of civic, educational, and charitable
Boards of Directors, including the Franklin Institute and the Board of Overseers
of the Wharton School of the University of Pennsylvania. He also

                                      -43-
<PAGE>

serves as Vice President/Development, Cradle of Liberty Council, Boy Scouts of
America and as Vice Chairman of the Technology Council of the Philadelphia
metropolitan area.

         Charles P. Pizzi, Trustee. Mr. Pizzi was elected a Trustee on August
22, 1996. Mr. Pizzi has served as President of the Greater Philadelphia Chamber
of Commerce since 1989. Mr. Pizzi is a director of Vestaur Securities, Inc. and
also serves on a variety of civic, educational and charitable Boards of
Directors, including the American Chamber of Commerce Executives, Boy Scouts of
America (Philadelphia Council), Drexel University, Greater Philadelphia Chamber
of Commerce, Independence Blue Cross, Pennsylvania Academy of the Fine Arts,
Philadelphia Convention & Visitors Bureau, Temple University School of Business
Management, United Way of Southeastern Pennsylvania, University of Pennsylvania
Graduate School of Education Board of Overseers and the Urban League of
Philadelphia.

         Each Trustee has been elected to serve for a one-year term expiring at
the 1999 annual meeting of shareholders and until the election and qualification
of his successor. Messrs. Nichols, Musser and D'Alessio were initially elected
to the Board of Trustees as nominees of SSI and TNC in connection with the
Company's acquisition of properties from SSI and TNC in August 1996, and Mr.
Pizzi was initially elected to the Board of Trustees as the joint nominee of
SSI, TNC and the Company in connection with such transaction.

         Mr. Gunty was initially elected to the Board of Trustees as a nominee
of LFREI in connection with the Company's acquisition of the Lazard Portfolio in
September 1998. LFREI has a right to maintain a designee on the Board until the
earlier of a change of control of the Company and the date when LFREI ceases to
own at least 60% in value of the securities that it acquired in the September
1998 transaction. Mr. Axinn was initially elected to the Board of Trustees in
connection with the Company's acquisition of the Axinn Portfolio in October
1998.

Committees of the Board of Trustees

         Audit Committee. The audit committee of the Board of Trustees (the
"Audit Committee") currently consists of Messrs. D'Alessio, Pizzi and Axinn. The
Audit Committee makes recommendations concerning the engagement of independent
public accountants, reviews with the independent public accountants the plans
and results of the audit engagement, approves professional services provided by
the independent public accountants, reviews the independence of the independent
public accountants, considers the range of audit and non-audit fees and reviews
the adequacy of the Company's internal accounting controls.

         Compensation Committee. The compensation committee of the Board of
Trustees (the "Compensation Committee") currently consists of Messrs. D'Alessio,
Pizzi and Gunty. The Compensation Committee is authorized to determine
compensation for the Company's executive officers, although formal action on
compensation matters during 1998 was taken by the full Board (with interested
members of the Board abstaining).

         Executive Committee. The executive committee of the Board of Trustees
(the "Executive Committee") currently consists of Messrs. Nichols, Sr., Sweeney
and D'Alessio. The Executive Committee has been delegated all powers of the
Board of Trustees except the power to: (i) declare dividends on Common Shares;
(ii) issue Common Shares (other than as permitted by the By-Laws as in effect
from time to time); (iii) recommend to shareholders any action that requires
shareholder approval; (iv) amend the Bylaws of the Company; or (v) approve any
merger or share exchange which does not require shareholder approval.





                                      -44-
<PAGE>

Section 16(a) Beneficial Ownership Reporting Compliance

         Section 16(a) of the Securities Exchange Act of 1934 requires the
Company's officers, Trustees and persons who own more than 10% of the Common
Shares to file reports of ownership and changes in ownership with the Securities
and Exchange Commission. Officers, Trustees and greater than 10% shareholders
are required by regulation to furnish the Company with copies of all Section
16(a) forms they file. Based solely on review of the copies of such forms
furnished to the Company, or written representations that no Annual Statements
of Beneficial Ownership of Securities on Form 5 were required to be filed, the
Company believes that during the fiscal year ended December 31, 1998, all
Section 16(a) filing requirements applicable to its officers, Trustees and
greater than 10% shareholders were complied with.

Item 11.  Executive Compensation

Cash and Non-Cash Compensation Paid to Executive Officers

         The following table sets forth certain information concerning the
compensation paid for the years ended December 31, 1998, 1997 and 1996: (i) to
the Company's President and Chief Executive Officer and (ii) to each of the
other four most highly compensated executive officers (the "Named Executive
Officers") of the Company, having a combined salary and bonus during the year
ended December 31, 1998 exceeding $100,000.

<TABLE>
<CAPTION>
                                                                      Annual Compensation             Long-Term Compensation
                                                                  --------------------------     --------------------------------
                                                                                                                   Securities
                                                                                                  Restricted       Underlying
                                                                                                 Share Awards     Options/SARs(#)
                                                                                                 -------------    ---------------
Name and Principal Position                          Year          Salary         Bonus (4)           (9)              (10)
- - ----------------------------                         ----          ------         ---------           ---              ----
<S>                                                  <C>         <C>            <C>               <C>                 <C>    
Anthony A. Nichols, Sr.                              1998        $ 250,000      $ 228,313   (5)   $ 4,000,000         678,958
Chairman of the Board                                1997        $ 200,000      $ 250,000                  --              --
                                                     1996  (1)   $  49,000      $  30,000                  --          40,000

Gerard H. Sweeney                                    1998        $ 300,000      $ 273,976   (6)   $ 6,000,000       1,018,489
President and Chief Executive Officer                1997        $ 200,000      $ 250,000                  --              --
                                                     1996        $ 134,000      $  30,000                  --         100,000

John M. Adderly, Jr.                                 1998        $ 125,000       $ 65,000   (7)   $   533,000          90,644
Senior Vice President - Operations                   1997        $ 102,885       $ 35,000                  --              --
                                                     1996        $  66,100       $ 15,000                  --          10,000

Anthony S. Rimikis                                   1998        $ 100,000       $ 50,000   (8)            --          25,000
Senior Vice President - Development & Construction   1997  (2)          --             --                  --              --
                                                     1996               --             --                  --              --

Mark S. Kripke                                       1998        $ 150,000       $     --          $  133,400          22,609
Chief Financial Officer                              1997  (3)   $  98,654       $ 40,000                  --              --
                                                     1996               --             --                  --              --
</TABLE>

 (1) Mr. Nichols, Sr. became an employee of the Company on August 22, 1996. See
     "Employment Agreements" below.

                                      -45-
<PAGE>

 (2) Mr. Rimikis became an employee of the Company on October 13, 1997.

 (3) Mr. Kripke became an employee of the Company on April 7, 1997. Mr. Kripke
     resigned from his position with the Company effective December 31, 1998.

(4)  1998 bonus amounts, which were approved by the Board of Trustees in
     accordance with the Company's executive compensation guidelines, were paid
     as follows: (i) 25% in Common Shares valued at $17.88 per share (the
     closing price of a Common Share on December 31, 1998) and (ii) 75%, at the
     election of the applicable executive officer, in any combination of cash
     and Common Shares valued at $15.19 per share (85% of the closing price of a
     Common Share on December 31, 1998). Of the Common Shares elected to be
     received in satisfaction of the 75% portion of the bonus ("Bonus Shares"),
     the portion of such Common Shares received as a result of the discounted
     purchase price is subject to certain transfer restrictions until December
     31, 2000. Common Shares issued to the recipients were acquired by the
     Company through open market purchases.

 (5) Paid as follows: (a) 25% portion, 2,332 Common Shares and (b) 75% portion
     $144,928 in cash and 2,745 Bonus Shares. The bonus amount shown above
     excludes an additional $50,000 bonus awarded in March 1999 on account of
     1998 performance.

 (6) Paid as follows: (a) 25% portion, 2,799 Common Shares and (b) 75% portion,
     $173,901 in cash and 3,294 Bonus Shares. The bonus amount shown above
     excludes an additional $80,000 bonus awarded in March 1999 on account of
     1998 performance.

 (7) Paid as follows: (a) 25% portion, 909 Common Shares and (b) 75% portion,
     $32,500 in cash and 1,070 Bonus Shares.

 (8) Paid as follows: (a) 25% portion, 699 Common Shares and (b) 75% portion,
     2,469 Bonus Shares.

 (9) The number of restricted shares awarded to each of the executives was equal
     to the dollar value specified above divided by the closing price of the
     Common Shares on January 2, 1998 ($25.25).

(10) The options awarded in 1996 are evidenced by certificates denominated as
     "warrants" and were vested and exercisable on the date of grant. The
     options awarded in 1998 vest ratably over five years.

                                      -46-
<PAGE>


Stock Options Granted to Executive Officers During Last Fiscal Year

         Summarized in the following table is information concerning options
awarded to the President and Chief Executive Officer and each of the other Named
Executive Officers of the Company for the year ended December 31, 1998.

<TABLE>
<CAPTION>
                                                                           % of Total
                                                          Number of       Options/SARs
                                                        Common Shares      Granted to                                   Grant Date
                                                      Underlying Option   Employees in      Exercise    Expiration     Present Value
                Name                                    Granted(#)(a)     Fiscal Year      Price($/sh)     Date            $(b)
- - --------------------------------------------------    -----------------   -----------      -----------  ----------     -------------
<S>                                                        <C>              <C>             <C>          <C>           <C>      
Anthony A. Nichols, Sr.                                    197,923                          $ 25.25      1/2/08        $ 526,673
Chairman of the Board                                      231,597                          $ 27.78      1/2/08        $ 495,618
                                                           249,438           33.2%          $ 29.04      1/2/08        $ 483,411

Gerard H. Sweeney                                          296,736                          $ 25.25      1/2/08        $ 789,318
President and Chief Executive Officer                      347,222                          $ 27.78      1/2/08        $ 743,055
                                                           374,531           49.8%          $ 29.04      1/2/08        $ 725,841

John M. Adderly, Jr.                                        26,409                          $ 25.25      1/2/08        $  70,274
Senior Vice President - Operations                          30,902                          $ 27.78      1/2/08        $  66,130
                                                            33,333            4.4%          $ 29.04      1/2/08        $  64,599

Anthony S. Rimikis                                          12,500                          $ 27.78      1/2/08         $ 26,750
Senior Vice President - Development & Construction          12,500            1.2%          $ 29.04      1/2/08         $ 24,225

Mark S. Kripke                                               6,587                          $ 25.25      1/2/08         $ 17,528
Chief Financial Officer (c)                                  7,708                          $ 27.78      1/2/08         $ 16,495
                                                             8,314            1.1%          $ 29.04      1/2/08         $ 16,113
</TABLE>

(a)  Options vest ratably over five years, subject to acceleration of vesting
     under certain circumstances, such as upon a change in control of the
     Company. Upon a change of control, unexercised options convert to 79,208,
     118,812 and 10,575 Common Shares for Mr. Nichols, Mr. Sweeney and Mr.
     Adderly, respectively. The number of Common Shares issuable upon a change
     of control is subject to a proportional reduction in the event of any prior
     option exercise.

(b)  The grant date present values for the options are determined using the
     Black-Scholes option pricing model. The assumptions used in calculating the
     Black-Scholes present values for the option grants were as follows: (a) a
     risk-free interest rate of 5.81% (based on the yield on a U.S. Treasury
     security with a maturity of 10 years (the life of the option)); (b) a
     dividend yield of 6.785%; (c) volatility of the Common Shares of 18.7%
     (based on the daily Common Share price for one year prior to the option
     grant); and (d) an option term of ten years.

     The Black-Scholes option pricing model was developed for use in estimating
     the fair value of traded options that have no vesting restrictions and are
     fully transferable. The amount realized from an employee stock option
     ultimately depends on the market value of the Common Shares on the date of
     exercise.

(c)  Mr. Kripke's options terminate by their terms on March 31, 1999, the
     ninetieth day following termination of his employment.

         With respect to the options granted to John M. Adderly, Jr., 72,933 of
such options will qualify as performance-based compensation under Section 162(m)
of the Code since the shares subject to these options have previously been
approved for awards by the Company's shareholders. The balance of the options
granted to Mr. Adderly will not qualify as performance-based compensation under
Section 162(m).

                                      -47-
<PAGE>

         With respect to the options granted to Anthony A. Nichols, Sr. and
Gerard H. Sweeney, none of such options will qualify as performance-based
compensation under Section 162(m) of the Code, and the taxable income recognized
in any year with respect to these awards will count toward the $1.0 million
limit on compensation deductible by the Company for compensation to each of Mr.
Nichols, Sr. and Sweeney for such year.

Stock Options Held by Executive Officers at December 31, 1998

         The following table sets forth certain information regarding options
for the purchase of Common Shares that were held by: (a) the Company's President
and Chief Executive Officer and (b) each of the other Named Executive Officers
of the Company at December 31, 1998. No options for the purchase of Common
Shares were exercised by such persons during the fiscal year ended December 31,
1998.






























                                      -48-
<PAGE>

               Aggregated Option/SAR Exercises in Last Fiscal Year
                      and Fiscal Year End Option/SAR Values

<TABLE>
<CAPTION>
                                                                                                Number of             Value of
                                                                                                Securities         Unexercised In-
                                                                                                Underlying            the-Money
                                                                                                Unexercised         Options at FY
                                                                Shares                       Options/SAR at FY-         End($)
                                                              Acquired on       Value       End (#) Exercisable/     Exercisable/
                    Name                                       Exercise        Realized         Unexercisable       Unexercisable
- - -------------------------------------------------------      -------------    ----------   ---------------------    -------------
<S>                                                           <C>               <C>         <C>                      <C>
Anthony A. Nichols, Sr.                                                                                            
Chairman of the Board                                             N/A             N/A       124,870 / 594,088           $0 / $0
                                                                                                                   
Gerard H. Sweeney                                                                                                  
President and Chief Executive Officer                             N/A             N/A       273,978 /  891,178       $274,364 / $0
                                                                                                                   
John M. Adderly, Jr.                                                                                               
Senior Vice President - Operations                                N/A             N/A        28,129 / 100,644           $0 / $0
                                                                                                                   
Anthony S. Rimikis                                                                                                 
Senior Vice President - Development & Construction                N/A             N/A         5,000 / 20,000            $0 / $0
                                                                                                                   
Mark S. Kripke                                                                                                     
Chief Financial Officer                                           N/A             N/A         4,522 / 18,087            $0 / $0
</TABLE>

Employment Agreements

         On January 2, 1998, each of Messrs. Nichols, Sr. and Sweeney entered
into a five-year employment agreement with the Company. In December 1998, the
Company extended the term of each such agreement for an additional one year. The
employment agreements established annual base salaries for each of Messrs.
Nichols, Sr. and Sweeney of $250,000 and $300,000, respectively, which
compensation may be increased by the Board of Trustees in its discretion. The
employment agreements include a provision entitling the applicable executive to
a payment equal to three times the sum of his annual salary and bonus: (i) upon
termination of the executive's employment without cause, (ii) upon resignation
by the executive "for good reason" or (iii) upon his death. Resignation by the
executive within six months following a reduction in the executive's salary, an
adverse change in his status or responsibilities, certain changes in the
location of the Company's headquarters or a change in control of the Company
would each constitute a resignation "for good reason."

Severance Agreements

         On December 17, 1998, each of John M. Adderly, Jr. and Anthony S.
Rimikis entered into severance agreements with the Company. These agreements
provide that, if such executive's employment is terminated (or constructively
terminated) within one year following the effective date of a change of control
of the Company, such executive will be entitled to salary continuation for a
period of one and a half years, with respect to Mr. Adderly, and one year, with
respect to Mr. Rimikis, from the effective date of such executive's termination.
The Company has entered into a similar agreement with Jeffrey F. Rogatz, who
became a Senior Vice President and Chief Financial Officer of the Company in
January 1999, and has entered into similar agreements with five other
non-executive officers of the Company.

                                      -49-
<PAGE>

401(k) Plan

         The Company maintains a Section 401(k) and Profit Sharing Plan (the
"401(k) Plan") covering its eligible employees and other designated affiliates.

         The 401(k) Plan permits eligible employees of the adopting employers
(the "Participating Companies") to defer up to a designated percentage of their
annual compensation, subject to certain limitations imposed by the Code. The
employees' elective deferrals are immediately vested and non-forfeitable upon
contribution to the 401(k) Plan. Each Participating Company reserves the right
to make matching contributions or discretionary profit sharing contributions in
the future.

         The 401(k) Plan is designed to qualify under Section 401 of the Code so
that contributions by employees or by the Participating Companies to the 401(k)
Plan, and income earned on plan contributions, are not taxable to employees
until withdrawn from the 401(k) Plan, and so that contributions by the
Participating Companies, if any, will be deductible by them when made.

Compensation Committee Interlocks and Insider Participation

         The Compensation Committee of the Board of Trustees is currently
comprised of Charles P. Pizzi, Walter D'Alessio and Murry N. Gunty. No executive
officer of the Company serves on the Compensation Committee.

         Walter D'Alessio, a member of the Company's Board of Trustees and
Compensation Committee, is President of Legg Mason Real Estate Services, Inc., a
mortgage banking firm and a subsidiary of Legg Mason, Inc. Legg Mason, Inc. is
the parent of Legg Mason Wood Walker, Incorporated, which was an underwriter in
three of the four public offerings of Common Shares consummated by the Company
between January 1, 1998 and the date of this Annual Report.

         On December 31, 1997, the Company acquired an office property in Valley
Forge, Montgomery County, Pennsylvania (the "PECO Building") from PECO Energy
Company for a purchase price of $9.5 million. Mr. D'Alessio, a member of the
Company's Board of Trustees, is a director of PECO Energy Company. A committee
of the Board of Trustees, of which Mr. D'Alessio was not a participant, made the
decision to purchase the PECO building and negotiated the terms of the
transaction.

         On September 28, 1998, the Company consummated a transaction (the
"Lazard Transaction") in which it acquired a portfolio of 67 office, industrial
and mixed use properties from LREI and its affiliates. Murry N. Gunty, one of
the principals of LFREI, became a member of the Board of Trustees on September
28, 1998. In connection with the Lazard Transaction, the Company agreed to
acquire an additional office property known as 8260 Greensboro Drive, McLean,
Virginia for $20.0 million payable through the issuance of Series B Preferred
Units of the Operating Partnership. In connection with the Lazard Transaction,
the Company also obtained an option to acquire an office property known as 1676
International Drive, McLean, Virginia and currently under construction for $68
million in cash. In the Lazard Transaction, an LFREI affiliate acquired Series B
Preferred Units having a stated value of $3.0 million in exchange for a $3.0
million promissory note that bears interest at 7.25% and matures on September
30, 1999. The Company may elect to use this note to pay a portion of the
exercise price for 1676 International Drive, should the Company exercise its
purchase option.

                                      -50-
<PAGE>

Compensation of Trustees

         During 1998, the Company paid its Trustees who are not employees of the
Company fees for their services as Trustees. These non-employee Trustees
received annual compensation of $20,000 (of which one-half was paid in Common
Shares and one-half was paid in cash) and a fee of $1,000 for attendance at each
meeting of the Board of Trustees and $500 for participation at each meeting of a
committee of the Board of Trustees. Trustees who are employees of the Company
receive no separate compensation for service as a trustee or committee member.

Item 12.  Security Ownership of Certain Beneficial Owners and Management

         The following table sets forth certain information as of March 15, 1999
(except as indicated in Note 3) regarding the beneficial ownership of Common
Shares (and Common Shares for which Class A Units may be exchanged) by each
Trustee, by each executive officer, by all Trustees and executive officers as a
group, and by each person known to the Company to be the beneficial owner of 5%
or more of the outstanding Common Shares. Except as indicted below, to the
Company's knowledge, all of such Common Shares are owned directly, and the
indicated person has sole voting and investment power.

<TABLE>
<CAPTION>
                                                                             Number of
                                                                              Common           Percentage of
Name and Business Address of Beneficial Owner (a)                             Shares         Common Shares (b)
- - -------------------------------------------------                           ----------       -----------------
<S>                                                                          <C>                     <C> 
Morgan Stanley Dean Witter & Co. (c)                                         2,478,755               6.5%
Murry N. Gunty (d)                                                           1,339,285               3.4%
Gerard H. Sweeney (e)                                                          633,840               1.6%
Anthony A. Nichols, Sr. (f)                                                    505,978               1.3%
Donald E. Axinn (g)                                                            101,000                  *
John M. Adderly, Jr. (h)                                                        66,618                  *
Mark S. Kripke (i)                                                               1,500                  *
Anthony S. Rimikis (j)                                                          11,507                  *
Warren V. Musser (k)                                                             5,545                  *
Walter D'Alessio (l)                                                               972                  *
Charles P. Pizzi (m)                                                               672                  *
All Trustees and Executive Officers as a Group (10 persons) (n)              2,666,214               6.7%
</TABLE>

*Less than one percent.

(a)  Unless indicated otherwise, the business address of each person listed is
     14 Campus Boulevard, Suite 100, Newtown Square, Pennsylvania 19073.

(b)  Assumes that all Class A Units eligible for redemption held by each named
     person or entity are redeemed for Common Shares. The total number of Common
     Shares outstanding used in calculating the percentage of Common Shares
     assumes that none of the Class A Units eligible for redemption held by
     other named persons or entities are redeemed for Common Shares.

(c)  Based on a Schedule 13G dated February 9, 1999, and filed for the year
     ended December 31, 1998. Morgan Stanley Dean Witter & Co. has a business
     address at 1585 Broadway, New York, New York 10036. Of this amount,
     1,488,329 (or 60%) of the Common Shares are owned by investment advisory
     clients of Morgan Stanley Dean Witter Asset Management Inc., a wholly-owned
     subsidiary of Morgan Stanley Dean Witter & Co.
    
(d)  Represents Common Shares issuable upon conversion, at $28.00 per Common
     Share, of 750,000 issued and outstanding Series A Preferred Shares having
     an aggregate stated value of $37.5 million which are held by Prometheus
     AAPT Holdings, L.L.C ("Prometheus"). Excludes an aggregate of 3,482,142
     Common Shares issuable upon redemption of Class A Units (issuable upon
     redemption or conversion of Series B Preferred Units held by entities
     controlled by LFREI) which are generally not subject to redemption until
     September 28, 1999. Mr. Gunty is a principal of LFREI, which is a general
     partner of LR Strategic Investors L.P., which is the sole member of
     Prometheus. Mr. Gunty disclaims beneficial ownership of all such Common
     Shares, except to the extent of his pro rata interests in such Common
     Shares. Mr. Gunty has a business address at 30 Rockefeller Plaza, 63rd
     Floor, New York, New York 10020.

                                      -51-
<PAGE>

(e)  Includes (a) 283,477 Common Shares and (b) 350,363 Common Shares issuable
     upon the exercise of options and warrants that are currently exercisable or
     that become exercisable within 60 days of March 15, 1999.

(f)  Includes (a) 269,596 Common Shares, (b) 192,564 Common Shares issuable upon
     exercise of warrants that are currently exercisable or that become
     exercisable within 60 days of March 15, 1999, and (c) 43,818 Common Shares
     issuable upon conversion of Class A Units beneficially owned by TNC or
     issuable to TNC on or before September 1, 1999. Mr. Nichols shares
     investment and voting power over the Common Shares beneficially owned by
     TNC. The foregoing includes 16,773 Common Shares and warrants to purchase
     an additional 21,696 Common Shares which Mr. Nichols owns jointly with his
     wife.

(g)  Includes (a) 1,000 Common Shares and (b) 100,000 Common shares issuable
     upon the exercise of options that are currently exercisable. Excludes an
     aggregate of 928,651 Common Shares issuable upon redemption of Class A
     Units which are generally not subject to redemption until October 6, 1999.
     Mr. Axinn has a business address at 131 Jericho Turnpike, Jericho, NY
     11743.

(h)  Includes (a) 38,490 Common Shares and (b) 28,128 Common Shares issuable
     upon the exercise of options and warrants that are currently exercisable or
     that become exercisable within 60 days of March 15, 1999.

(i)  Excludes 4,521 Common Shares issuable upon the exercise of options which
     terminated on March 31, 1999. Mr. Kripke resigned from his position within
     the Company effective December 31, 1998.

(j)  Includes (a) 6,507 Common Shares and (b) 5,000 Common Shares issuable upon
     the exercise of options that become exercisable within 60 days of March 15,
     1999.

(k)  Mr. Musser has a business address at 800 The Safeguard Building, 435 Devon
     Park Drive, Wayne, Pennsylvania 19087.

(l)  Mr. D'Alessio has a business address at 1735 Market Street, Philadelphia,
     Pennsylvania 19103.

(m)  Mr. Pizzi has a business address at 200 South Broad, Philadelphia,
     Pennsylvania 19103

(n)  Includes 1,339,285 Common Shares beneficially owned by Prometheus. Mr.
     Gunty disclaims beneficial ownership of all such Common Shares, except to
     the extent of his pro rata interest in such Common Shares.





                                      -52-
<PAGE>

Item 13.  Certain Relationships and Related Transactions

August 22, 1996 Transaction

         On August 22, 1996, the Company consummated a transaction (the "SSI/TNC
Transaction") in which the Company acquired, through the Operating Partnership,
substantially all of the real estate holdings of Safeguard Scientifics, Inc.
("SSI") and SSI's real estate affiliate, The Nichols Company ("TNC"), then a
private real estate development and management services company. The then
President of TNC, Anthony A. Nichols, Sr. and the Chairman and Chief Executive
Officer of SSI, Warren V. Musser, became members of the Board of Trustees on
August 22, 1996. In addition to the 495,837 Units issued by the Operating
Partnership to SSI, TNC and the other persons that became limited partners in
the Operating Partnership as part of the SSI/TNC Transaction (collectively, the
"Original Limited Partners") on August 22, 1996, the Operating Partnership will
be required to issue to certain of the Original Limited Partners 44,322 Units by
September 1, 1999 to acquire residual interests retained by them in certain of
the Properties contributed to the Operating Partnership on August 22, 1996. The
Partnership Agreement of the Operating Partnership gives the Original Limited
Partners the right to cause the Company to redeem their Class A Units for cash,
at a per Class A Unit price based on the average closing price of the Common
Shares for the five consecutive trading days prior to such determination (or, at
the option of the Company, Common Shares on a one Common Share per Unit basis,
subject to customary antidilution adjustments).

Option Properties

         At the closing of the SSI/TNC Transaction, the Operating Partnership
acquired an option from an affiliate of TNC entitling it to acquire, in the
Operating Partnership's discretion, four properties containing an aggregate of
approximately 159,000 net rentable square feet (collectively, the "Option
Properties") at any time during the two-year period ending August 22, 1998
(subject to two extensions of one year each). The Operating Partnership
exercised the first of the two extensions resulting in a one year extension to
August 22, 1999. The parties have agreed that the purchase price payable by the
Operating Partnership upon exercise of its option will consist of $10.00 in
excess of the mortgage debt encumbering the Option Properties at the time of
exercise (which as of December 31, 1998 aggregated $21.2 million. Exercise of
the option is subject to a right of first refusal in favor of, and the consent
of, the holder of the mortgage encumbering the Option Properties. There can be
no assurance that the Company will exercise its option or that the holder of
such mortgage will consent to the exercise of the option.

Environmental Indemnity

         SSI has agreed to indemnify the Operating Partnership against the cost
of remediation that may be required to be undertaken on account of certain
environmental conditions at one of the Properties acquired in the SSI/TNC
Transaction subject to an aggregate maximum liability of approximately $2.0
million. The term of the SSI indemnity agreement expires on August 22, 2001.

Repayment of Certain Obligations

         On August 21, 1997, the Company paid an aggregate of approximately
$594,384 (the "Payment Amount") to satisfy obligations of TNC (a company
controlled by Mr. Nichols, Sr.) on account of brokerage commissions and tenant
improvements. In exchange, TNC transferred to the Company 28,994 Units. The
number of Class A Units transferred to the Company equaled the Payment Amount
divided by the then market value of the number of Common Shares into which such
transferred Class A Units were then redeemable.

                                      -53-
<PAGE>

 Involvement of Legg Mason

         Walter D'Alessio, a member of the Company's Board of Trustees and
Compensation Committee, is President of Legg Mason Real Estate Services, Inc., a
mortgage banking firm and a subsidiary of Legg Mason, Inc. Legg Mason, Inc. is
the parent of Legg Mason Wood Walker, Incorporated, which was an underwriter in
three of the four public offerings of Common Shares consummated by the Company
between January 1, 1998 and the date of this Annual Report.

Interests in Sellers

         On March 7, 1997, the Company acquired a 6.763 acre parcel of
undeveloped land located in Horsham Township, Montgomery County, Pennsylvania
for approximately $1.0 million. The seller was Horsham Valley, Inc. The purchase
price was paid through a combination of approximately $645,000 in cash and a
non-interest bearing promissory note for $369,166 that was paid on February 27,
1998. The purchase price for the property was determined by negotiation between
the Company and the seller. Mr. Nichols, Sr., the Company's Chairman, holds an
approximately 25% interest in the seller.

         On December 17, 1997, the Company acquired an office property in Valley
Forge, Montgomery County, Pennsylvania (the "PECO Building") from PECO Energy
Company for a purchase price of $9.5 million. Mr. D'Alessio, a member of the
Company's Board of Trustees, is a director of PECO Energy Company. A committee
of the Board of Trustees, of which Mr. D'Alessio was not a participant, made the
decision to purchase the PECO Building and negotiated the terms of the
transaction.

         On July 29, 1998, the Company acquired approximately 23 acres of
undeveloped land in Horsham Township, Montgomery County, Pennsylvania for
approximately $3.5 million. The seller was LC/N Keith Valley Partnership II. The
purchase price was paid in cash. The purchase price for the property was
determined by negotiation between the Company and the seller. Mr. Nichols, Sr.,
the Company's Chairman, holds an approximately 25% indirect interest in the
seller.

Lazard Transaction

     On September 28, 1998, the Company consummated a transaction (the "Lazard
Transaction") in which it acquired a portfolio of 67 office, industrial and
mixed use properties from LREI and its affiliates. Murry N. Gunty, one of the
principals of LFREI, became a member of the Board of Trustees on September 28,
1998. In connection with the Lazard Transaction, the Company agreed to acquire
an additional office property known as 8260 Greensboro Drive, McLean, Virginia
for $20.0 million payable through the issuance of Series B Preferred Units of
the Operating Partnership. In connection with the Lazard Transaction, the
Company also obtained an option to acquire an office property known as 1676
International Drive, McLean, Virginia and currently under construction for $68.0
million in cash. In the Lazard Transaction, an LFREI affiliate acquired Series B
Preferred Units having a stated value of $3.0 million in exchange for a $3.0
million promissory note that bears interest at 7.25% and matures on September
30, 1999. The Company may elect to use this note to pay a portion of the
exercise price for 1676 International Drive, should the Company exercise its
purchase option.

Axinn Transaction

     On October 6, 1998, the Company consummated a transaction (the "Axinn
Transaction") in which it acquired a portfolio of 22 office and industrial
properties from the Donald E. Axinn Companies and affiliates. Mr. Axinn became a
member of the Board of Trustees on October 6, 1998. In connection with the Axinn
Transaction, the Company agreed to acquire an additional six office properties
containing an aggregate of approximately 983,053 net rentable square feet for an
aggregate purchase price of $63.1 million, upon satisfaction of certain
conditions. On December 28, 1998, the Company acquired one of these properties,
known as 3 Paragon Drive, Montvale, New Jersey, for $11.0 million in cash.

                                      -54-
<PAGE>

Share Purchase Loans

         On October 20, 1998, following Board authorization of Company loans
aggregating up to $5.0 million to enable employees of the Company to purchase
Common Shares on the open market, the Operating Partnership loaned executive
officers of Brandywine an aggregate of $1,399,792, as follows: Mr. Nichols, Sr.
($499,995), Mr. Sweeney ($599,786), Mr. Adderly ($250,006), and Mr. Rimikis
($50,005). Proceeds of these loans were used solely to enable these executive
officers to purchase Common Shares. The loans have a five-year term, are full
recourse and are secured by the Common Shares purchased. Interest accrues on the
loans at the lower of the interest rate borne on borrowings under Brandywine's
New 1998 Credit Facility (6.49% as of February 16, 1999) and a rate based on the
dividend payments on the Common Shares (8.6 % based on the $0.39 fourth quarter
1998 dividend) and is payable quarterly. The principal of the loans is payable
at the earlier of October 20, 2001 and 90 days following termination of the
applicable executive's employment with Brandywine. In connection with the hiring
by the Company of Mr. Rogatz as Senior Vice President and Chief Financial
Officer of the Company, the Company agreed to loan Mr. Rogatz up to $200,000 to
acquire Common Shares on the same terms as the foregoing loan. In January 1999,
the Operating Partnership agreed to loan executive officers of Brandywine an
aggregate of $81,107, as follows: Mr. Nichols, Sr. ($26,897), Mr. Sweeney
($32,276), Mr. Adderly ($11,521) and Mr. Rimikis ($10,413). Proceeds of these
loans funded tax withholding payments due in connection with certain year-end
bonuses. These loans mature on December 31, 1999, are full recourse and accrue
interest at the short-term applicable federal rate as of January 1, 1999 (4.5%).






















                                      -55-
<PAGE>

                                     PART IV

Item 14.  Exhibits, Financial Statement Schedules and Reports on Form 8-K

         (a)      1. and 2.   Financial Statements and Schedules

         The financial statements and schedules listed below are filed as part
of this annual report on the pages indicated.

                   Index to Financial Statements and Schedules

<TABLE>
<CAPTION>
                                                                                                Page
                                                                                                ----
<S>                                                                                             <C>
Report of Independent Public Accountants.........................................................F-1

Consolidated Balance Sheets as of December 31, 1998 and December 31, 1997........................F-2

Consolidated Statements of Operations for the Years Ended December 31, 1998,
  1997 and 1996..................................................................................F-3

Consolidated Statements of Beneficiaries' Equity for the Years Ended December 31, 1998,
  1997 and 1996..................................................................................F-4

Consolidated Statements of Cash Flows for the Years Ended December 31, 1998,
  1997 and 1996..................................................................................F-5

Notes to Financial Statements....................................................................F-6

Schedule II  - Valuation and Qualifying Accounts.................................................F-21

Schedule III - Real Estate and Accumulated Depreciation..........................................F-22
</TABLE>

3.       Exhibits
<TABLE>
<CAPTION>
Exhibits No.     Description
- - ------------     -----------
<S>             <C>
 (1)  3.1.1     Amended and Restated Declaration of Trust of the Company (amended and restated as of May 12, 1997).
 (2)  3.1.2     Articles of Amendment to Declaration of Trust of the Company (September 4, 1997).
 (3)  3.1.3     Articles of Amendment to Declaration of Trust of the Company (No. 2).
 (4)  3.1.4     Articles Supplementary to Declaration of Trust of the Company (September 28, 1998)
      3.1.5     Articles of Amendment to Declaration of Trust of the Company (March 19, 1999)
 (5)  3.2       Amended and Restated Bylaws of the Company.
 (6) 10.01      Brandywine Realty Partners General Partnership Agreement.
 (6) 10.02      Second Amended and Restated Partnership Agreement of Brandywine Realty Services Partnership.
 (7) 10.03      Amendment to Brandywine Realty Partners General Partnership Agreement.
 (8) 10.04      Third Amendment to Brandywine Realty Partners General Partnership Agreement.
 (8) 10.05      Form of Warrant issued to Executive Officers.  **
 (8) 10.06      Environmental Indemnity Agreement between the Company and SSI.
 (8) 10.07      Articles of Incorporation of Brandywine Realty Services Corporation, as amended.
 (9) 10.08      Amended and Restated Agreement of Limited Partnership of Brandywine Operating Partnership, L.P.
                (the "Operating Partnership").
 (9) 10.09      Amendment No. 1 to Amended and Restated Agreement of Limited Partnership of the Operating
                Partnership.
</TABLE>

                                      -56-
<PAGE>

<TABLE>
<S>             <C>
 (9) 10.10      First Amendment to Amended and Restated Agreement of Limited Partnership of the Operating
                Partnership
 (9) 10.11      Tax Indemnification Agreement - PWCC
 (9) 10.12      Tax Indemnification Agreement - Laurel Oak
 (9) 10.13      Tax Indemnification Agreement - English Creek
(10) 10.14      Second Amendment, dated March 31, 1998, to the Amended and Restated Agreement of Limited Partnership
                Agreement of Brandywine Operating Partnership, L.P.
(10) 10.15      Tax Indemnification Agreement, dated March 31, 1998, by and between Brandywine Operating Partnership, L.P. and
                Brookstone Investors, L.L.C.
(10) 10.16      Tax Indemnification Agreement, dated March 31, 1998, by and between Brandywine Operating
                Partnership, L.P. and Brookstone Holdings of Del. -4, L.L.C.
(10) 10.17      Tax Indemnification Agreement, dated March 31, 1998, by and between Brandywine Operating
                Partnership, L.P. and Brookstone Holdings of Del. -5, L.L.C.
(10) 10.18      Tax Indemnification Agreement, dated March 31, 1998, by and between Brandywine Operating
                Partnership, L.P. and Brookstone Holdings of Del. -6, L.L.C.
(11) 10.19      Contribution Agreement, dated April 7, 1998, by and between the entities listed on Schedule
                thereto and Brandywine Operating Partnership, L.P.
(11) 10.20      First Amendment to Contribution Agreement dated May 8, 1998.
(11) 10.21      Third Amendment, dated May 8, 1998, to the Amended and Restated Agreement of Limited
                Partnership of Brandywine Operating Partnership, L. P.
(11) 10.22      Tax Indemnification Agreement dated May 8, 1998, by and between Brandywine Operating Partnership, L.P. and the
                parties identified on the signature page.
(12) 10.23      Contribution Agreement (Axinn)
(12) 10.24      Form of Axinn Options **
(12) 10.26      Form of Hamer Options **
 (4) 10.27      Second Amended and Restated Credit Agreement
 (4) 10.28      Pledge Agreement
 (4) 10.29      Credit Agreement
 (4) 10.30      Fourth Amendment to the Amended and Restated Agreement of Limited Partnership of the Operating
                Partnership creating the Series A Preferred Mirror Units.
 (4) 10.31      Fifth Amendment to the Amended and Restated Agreement of Limited Partnership of the
                Operating Partnership creating the Series B Preferred Units.
 (4) 10.32      Sixth Amendment to the Amended and Restated Agreement of Limited Partnership of the
                Operating Partnership
 (4) 10.33      First Amendment to Contribution Agreement (Axinn)
(13) 10.34      Contribution and Purchase Agreement (Lazard)
(13) 10.35      Form of Board of Trustees Designation Letter
     10.36      Amended and Restated Employment Agreement of Anthony A. Nichols, Sr.**
     10.37      Amended and Restated Employment Agreement of Gerard H. Sweeney  **
     10.38      Amended and Restated Non-Qualified Stock Option Award to Anthony A. Nichols, Sr. **
     10.39      Amended and Restated Non-Qualified Stock Option Award to Gerard H. Sweeney **
     10.40      Amended and Restated Non-Qualified Stock Option Award to John M. Adderly, Jr.**
     10.41      Non-Qualified Stock Option Award to Jeffrey F. Rogatz**
(14) 10.42      Restricted Share Award to Anthony A. Nichols, Sr.**
(14) 10.43      Restricted Share Award to Gerard H. Sweeney**
(14) 10.44      Restricted Share Award to John M. Adderly, Jr.**
     10.45      Long-Term Performance Award for Anthony A. Nichols, Sr. **
     10.46      Long-Term Performance Award for Gerard H. Sweeney**
     10.47      Long-Term Performance Award for John M. Adderly, Jr. **
     10.48      Long-Term Performance Award for Anthony S. Rimikis**
     10.49      Severance Agreement (Jeffrey F. Rogatz) **
     10.50      Severance Agreement (John M. Adderly, Jr.) **
     10.51      Severance Agreement (Anthony S. Rimikis) **
</TABLE>

                                      -57-
<PAGE>

<TABLE>
<S>             <C>                                            
     21.1       List of Subsidiaries of the Company.
     23.1       Consent of Arthur Andersen LLP.
     27.1       Financial Data Schedule.
</TABLE>

 (1)  Previously filed as an exhibit to the Company's Form 8-K dated June 9,
      1997 and incorporated herein by reference.

 (2)  Previously filed as an exhibit to the Company's Form 8-K dated September
      10, 1997 and incorporated herein by reference.

 (3)  Previously filed as an exhibit to the Company's Form 8-K dated June 3,
      1998 and incorporated herein by reference.

 (4)  Previously filed as an exhibit to the Company's Form 8-K dated October 13,
      1998 and incorporated herein by reference.

 (5)  Previously filed as an exhibit to the Company's Form 8-K dated December
      31, 1996 and incorporated herein by reference.

 (6)  Previously filed as an exhibit to the Company's Registration statement of
      Form S-11 (File No. 33-4175) and incorporated herein by reference.

 (7)  Previously filed as an exhibit to the Company's Form 10-K for the fiscal
      year ended December 31, 1993 and incorporated herein by reference.

 (8)  Previously filed as an exhibit to the Company's Form 8-K dated August 22,
      1996 and incorporated herein by reference.

 (9)  Previously filed as an exhibit to the Company's Form 8-K dated December
      17, 1997 and incorporated herein by reference.

(10) Previously filed as an exhibit to the Company's Form 8-K dated April 13,
     1998 and incorporated herein by reference.

(11) Previously filed as an exhibit to the Company's Form 8-K dated May 14, 1998
     and incorporated herein by reference.

(12) Previously filed as an exhibit to the Company's Form 8-K dated July 30,
     1998 and incorporated herein by reference.

(13) Previously filed as an exhibit to the Company's Form 8-K dated August 13,
     1998 and incorporated herein by reference.

(14) Previously filed as an exhibit to the Company's Form 10-K for the fiscal
     year ended December 31, 1997 and incorporated herein by reference.

     **   Management contract or compensatory plan or arrangement.


     (b)   Reports on Form 8-K

            During the fourth quarter of the year ended December 31, 1998, the
Company filed two Current Reports on Form 8-K. On October 13, 1998, the Company
filed a Current Report on Form 8-K (reporting under Items 2, 5 and 7). On
October 21, 1998, the Company filed a Current Report on Form 8-K (reporting
under Item 7). This Current Report included an audited statement of revenues and
certain operating expenses of the Lazard Properties for the year ended December
31, 1997 and the unaudited statement of revenue and certain operating expenses
for the six months ended June 30, 1998. This Current Report also included an
audited statement of revenues and certain operating expense of the Axinn
Properties for the year ended December 31, 1997 and the unaudited statement of
revenue and certain operating expenses for the six months ended June 30, 1998.
This Current Report also included an audited statement of revenues and certain
operating expenses of the Axinn Properties for the year ended December 31, 1997
and the unaudited statement of revenue and certain operating expenses for the
six months ended June 30, 1998. This Current Report also included pro forma
financial information for the six months ended June 30, 1998 and for the year
ended December 31, 1997.

                                      -58-
<PAGE>

                                   SIGNATURES

         Pursuant to the requirements of Section 13 or 15(d) of the Securities
and Exchange Act of 1934, the registrant has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.

                                    BRANDYWINE REALTY TRUST

                                    By:  /s/ Gerard H. Sweeney
                                        -------------------------------------
                                        Gerard H. Sweeney
                                        President and Chief Executive Officer

                  Pursuant to the requirements of the Securities and Exchange
Act of 1934, this report has been signed below by the following persons on
behalf of the registrant in the capacities and on the dates indicated.

<TABLE>
<CAPTION>
                 Signature                                         Title                               Date
                 ---------                                         -----                               ----
<S>                                           <C>                                               <C>
/s/ Anthony A. Nichols, Sr.                   Chairman of the Board and Trustee                 March 31, 1999
- - ----------------------------------------
Anthony A. Nichols, Sr.

/s/ Gerard H. Sweeney                         President, Chief Executive Officer and Trustee    March 31, 1999
- - ----------------------------------------      (Principal Executive Officer)
Gerard H. Sweeney                             

 /s/ Jeffrey F. Rogatz                        Chief Financial Officer -- (Principal Financial   March 31, 1999
- - ----------------------------------------      and Accounting Officer)
Jeffrey F. Rogatz

/s/ Warren V. Musser                          Trustee                                           March 31, 1999
- - ----------------------------------------
Warren V. Musser

/s/ Walter D'Alessio                          Trustee                                           March 31, 1999
- - ----------------------------------------
Walter D'Alessio

/s/ Charles P. Pizzi                          Trustee                                           March 31, 1999
- - ----------------------------------------
Charles P. Pizzi

/s/ Murry N. Gunty                            Trustee                                           March 31, 1999
- - ----------------------------------------
Murry N. Gunty

/s/ Donald E. Axinn                           Trustee                                           March 31, 1999
- - ----------------------------------------
Donald E. Axinn
</TABLE>

















                                      -59-
<PAGE>


                                  Exhibit Index


<TABLE>
<CAPTION>
Exhibit
- - -------
<S>      <C>
3.1.5    Articles of Amendment to Declaration of Trust of the Company (March 19, 1999)
10.36    Amended and Restated Employment Agreement of Anthony A. Nichols, Sr.**
10.37    Amended and Restated Employment Agreement of Gerard H. Sweeney  **
10.38    Amended and Restated Non-Qualified Stock Option Award to Anthony A. Nichols, Sr. **
10.39    Amended and Restated Non-Qualified Stock Option Award to Gerard H. Sweeney **
10.40    Amended and Restated Non-Qualified Stock Option Award to John M. Adderly, Jr.**
10.41    Non-Qualified Stock Option Award to Jeffrey F. Rogatz**
10.45    Long-Term Performance Award for Anthony A. Nichols, Sr. **
10.46    Long-Term Performance Award for Gerard H. Sweeney**
10.47    Long-Term Performance Award for John M. Adderly, Jr. **
10.48    Long-Term Performance Award for Anthony S. Rimikis**
10.49    Severance Agreement (Jeffrey F. Rogatz) **
10.50    Severance Agreement (John M. Adderly, Jr.) **
10.51    Severance Agreement (Anthony S. Rimikis) **
21.1     List of Subsidiaries of the Company.
23.1     Consent of Arthur Andersen LLP.
27.1     Financial Data Schedule.
</TABLE>

- - -----------------

*Indicates management contract or compensatory plan or arrangement.
<PAGE>

 REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To the Beneficiaries of Brandywine Realty Trust:

We have audited the consolidated balance sheets of Brandywine Realty Trust (a
Maryland real estate investment trust) and subsidiaries as of December 31, 1998
and 1997, and the related consolidated statements of operations, beneficiaries'
equity and cash flows for each of the three years in the period ended December
31, 1998. These consolidated financial statements and the schedules referred to
below are the responsibility of the Company's management. Our responsibility is
to express an opinion on these consolidated financial statements and schedules
based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the consolidated financial position of Brandywine Realty
Trust and subsidiaries as of December 31, 1998 and 1997, and the consolidated
results of their operations and their cash flows for each of the three years in
the period ended December 31, 1998, in conformity with generally accepted
accounting principles.

Our audit was made for the purpose of forming an opinion on the basic financial
statements taken as a whole. The schedules listed on the index of financial
statement schedules on Item 14 are presented for purposes of complying with the
Securities and Exchange Commission's rules and are not a required part of the
basic financial statements. These schedules have been subjected to the auditing
procedures applied in the audit of the basic financial statements and in our
opinion fairly state in all material respects the financial data required to be
set forth therein to the basic financial statements taken as a whole.


                                                     ARTHUR ANDERSEN LLP

Philadelphia, Pennsylvania
March 2, 1999 (except with respect to the matter 
discussed in Note 15, as to
which the date is March 26, 1999)


                                      F-1

<PAGE>

                             BRANDYWINE REALTY TRUST
                           CONSOLIDATED BALANCE SHEETS
                                 (in thousands)

<TABLE>
<CAPTION>
                                                                       December 31,   December 31,
                                                                          1998           1997
                                                                       ------------   ------------
                               ASSETS
<S>                                                                  <C>              <C>
Real estate investments:
   Operating properties                                              $ 1,908,095      $ 586,414
   Accumulated depreciation                                              (67,477)       (22,857)
                                                                     -----------      ---------
                                                                       1,840,618        563,557
                                                                                    
Cash and cash equivalents                                                 13,075         29,442
Escrowed cash                                                              3,489            212
Accounts receivable, net                                                  10,769          3,689
Due from affiliates                                                       10,186            214
Investment in management company                                             148             74
Investment in real estate ventures, at equity                             10,603          5,480
Deferred costs, net                                                       10,787          6,680
Other Assets                                                              12,005         12,133
                                                                     -----------      ---------
   Total assets                                                      $ 1,911,680      $ 621,481
                                                                     ===========      =========
                                                                                    
               LIABILITIES AND BENEFICIARIES' EQUITY                                
                                                                                    
Mortgage notes payable                                                 $ 319,235       $ 48,731
Borrowings under credit facilities                                       681,325        115,233
Accounts payable and accrued expenses                                     10,295          3,234
Distributions payable                                                     17,850          8,843
Tenant security deposits and deferred rents                               12,123          5,535
                                                                     -----------      ---------
   Total liabilities                                                   1,040,828        181,576
                                                                     -----------      ---------
Minority interest                                                        127,198         14,377
                                                                     -----------      ---------
Preferred Shares, $0.01 par value, 5,000,000 shares                                 
   authorized, 750,000 convertible preferred shares issued                          
   and outstanding at December 31, 1998                                   37,500              -
                                                                     -----------      ---------

Commitments and Contingencies (Note 14)                                           

Beneficiaries' equity:
   Common Shares of beneficial interest, $0.01 par value,
     100,000,000 common shares authorized, 37,573,381
     and 24,087,315 shares issued and outstanding at
     December 31, 1998 and 1997, respectively                                376            241
   Additional paid-in capital                                            751,889        446,054
   Share warrants                                                            962            962
   Cumulative earnings                                                    44,076         11,753
   Cumulative distributions                                              (91,149)       (33,482)
                                                                     -----------      ---------
   Total beneficiaries' equity                                           706,154        425,528
                                                                     -----------      ---------
   Total liabilities and beneficiaries' equity                       $ 1,911,680      $ 621,481
                                                                     ===========      =========

</TABLE>

        The accompanying notes are an integral part of these statements.

                                      F-2
<PAGE>


                             BRANDYWINE REALTY TRUST
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                  (in thousands, except per share information)
<TABLE>
<CAPTION>
                                                                                                      Year Ended
                                                                                                      December 31,
                                                                                         ----------------------------------------
                                                                                            1998            1997            1996
                                                                                         ---------        --------        -------
<S>                                                                                      <C>              <C>             <C>
Revenue:
    Rents                                                                                $ 163,865        $ 49,928        $ 8,462
    Tenant reimbursements                                                                   24,140           9,396          1,372
    Other                                                                                    4,856           1,736            196
                                                                                         ---------        --------        -------
      Total revenue                                                                        192,861          61,060         10,030
                                                                                         ---------        --------        -------
Operating Expenses:
    Interest                                                                                36,886           7,079          2,751
    Depreciation and amortization                                                           48,002          15,589          2,836
    Amortization of deferred compensation costs                                              1,488               -              -
    Property operating expenses                                                             60,824          20,144          3,403
    Management fees                                                                          6,922           2,301            306
    Administrative expenses                                                                  1,711             659            825
                                                                                         ---------        --------        -------
      Total operating expenses                                                             155,833          45,772         10,121
                                                                                         ---------        --------        -------
Income (loss) before equity in income (loss) of management company, equity in
    income of real estate ventures, gains on sales, minority interest
    and extraordinary items                                                                 37,028          15,288            (91)
Equity in income (loss) of management company                                                   74              89            (26)
Equity in income of real estate ventures                                                       144               -              -
                                                                                         ---------        --------        -------
Income (loss) before gains on sales, minority interest
    and extraordinary items                                                                 37,246          15,377           (117)
Gains on sale of interests in real estate                                                      209               -              -
                                                                                         ---------        --------        -------
Income (loss) before minority interest and extraordinary items                              37,455          15,377           (117)
Minority interest                                                                           (2,427)           (376)           (45)
                                                                                         ---------        --------        -------
Income (loss) before extraordinary items                                                    35,028          15,001           (162)
Extraordinary items                                                                         (2,003)              -              -
                                                                                         ---------        --------        -------
Net Income (loss)                                                                           33,025          15,001           (162)
Income allocated to Preferred Shares                                                          (702)           (499)          (401)
                                                                                         ---------        --------        -------
Income (loss) allocated to Common Shares                                                 $  32,323        $ 14,502        $  (563)
                                                                                         =========        ========        =======
Basic earnings per Common Share before extraordinary item                                $    0.95        $   0.96        $ (0.44)
                                                                                         =========        ========        =======
Diluted earnings per Common Share before extraordinary item                              $    0.95        $   0.95        $ (0.44)
                                                                                         =========        ========        =======
Basic earnings per Common Share after extraordinary item                                 $    0.90        $   0.96        $ (0.44)
                                                                                         =========        ========        =======
Diluted earnings per Common Share after extraordinary item                               $    0.89        $   0.95        $ (0.44)
                                                                                         =========        ========        =======

</TABLE>
        The accompanying notes are an integral part of these statements.

                                      F-3
<PAGE>

                             BRANDYWINE REALTY TRUST
                CONSOLIDATED STATEMENTS OF BENEFICIARIES' EQUITY
              FOR THE YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996
                     (in thousands, except number of shares)
<TABLE>
<CAPTION>
                                                                     Common       Capital                 Cumulative
                                                Common Shares of    Shares Par   in Excess      Share      Earnings      Cumulative
                                               Beneficial Interest    Value     of Par Value   Warrants    (Deficit)   Distributions
                                               -------------------    -----     ------------   --------    ---------   -------------
<S>                                                <C>               <C>        <C>             <C>        <C>          <C>
BALANCE, JANUARY 1, 1996                               618,733       $   6      $  16,785       $   -      $ (3,086)    $  (6,361)

Issuance of Common Shares                            6,394,507          64         96,262         906             -             -

Issuance of warrants in connection with Series A 
Preferred Shares                                             -           -              -          56             -             -

Net loss                                                     -           -              -           -          (162)            -

Preferred Share Distributions                                -           -              -           -             -          (401)

Distributions ($0.82 per share)                              -           -              -           -             -        (2,143)
                                                    ----------       -----      ---------       -----      --------     ---------

BALANCE, December 31, 1996                           7,013,240       $  70      $ 113,047       $ 962      $ (3,248)    $  (8,905)

Issuance of Common Shares                           17,074,075         171        333,007           -             -             -

Net income                                                   -           -              -           -        15,001             -

Preferred Share Distributions                                -           -              -           -             -          (499)

Distributions ($1.44 per share)                              -           -              -           -             -       (24,078)
                                                    ----------       -----      ---------       -----      --------     ---------

BALANCE, December 31, 1997                          24,087,315       $ 241      $ 446,054       $ 962      $ 11,753     $ (33,482)

Issuance of Common Shares                           13,572,810         136        307,491           -             -             -

Repurchase of Common Shares                            (86,744)         (1)        (1,656)          -             -             -

Net income                                                   -           -              -           -        33,025             -

Preferred Share Distributions                                -           -              -           -          (702)            -

Distributions ($1.52 per share)                              -           -              -           -             -       (57,667)
                                                    ----------       -----      ---------       -----      --------     ---------
BALANCE, December 31, 1998                          37,573,381       $ 376      $ 751,889       $ 962      $ 44,076     $ (91,149)
                                                   ===========       =====      =========       =====      ========     =========
</TABLE>

        The accompanying notes are an integral part of these statements.

                                      F-4
<PAGE>



                             BRANDYWINE REALTY TRUST
                      CONSOLIDATED STATEMENTS OF CASH FLOW
                                 (in thousands)
<TABLE>
<CAPTION>
                                                                                               Year Ended
                                                                                               December 31,
                                                                           ----------------------------------------------------
                                                                             1998                    1997               1996
                                                                           --------               --------            --------
<S>                                                                        <C>                    <C>                   <C>
Cash flows from operating activities:
Net income                                                                 $ 33,025               $ 15,001              $ (162)
Adjustments to reconcile net income to net cash provided
   by operating activities:
   Minority interest                                                          2,427                    376                  45
   Depreciation and amortization                                             48,002                 15,589               2,836
   Equity in income of management company                                       (74)                   (89)                 26
   Equity in income of real estate ventures                                    (144)                     -                   -
   Amortization of deferred compensation costs                                1,488                      -                   -
   Issuance of shares to trustees                                                29                      -                   -
   Amortization of discounted notes payable                                     229                    334                  32
   Gain on sale of interests in real estate                                    (209)                     -                   -
   Extraordinary items                                                        2,003                      -                   -
   Changes in assets and liabilities:
    (Increase) decrease in accounts receivable                               (7,080)                (2,323)               (493)
    (Increase) decrease in affiliate receivable                              (9,972)                   303                (517)
    (Increase) decrease in prepaid assets and deferred costs                (14,775)                (1,303)                (45)
    Increase (decrease) in accounts payable and accrued expenses              7,704                  1,473                 589
    Increase (decrease) in other liabilities                                  6,588                  4,211                 257
                                                                           --------               --------            --------
     Net cash provided by operating activites                                69,241                 33,572               2,568
                                                                           --------               --------            --------
Cash flows from investing actitivies:
    Acquisition of properties                                              (878,484)              (406,871)            (33,918)
    Sales of properties                                                      14,704
    Investment in real estate ventures                                       (4,979)                (5,480)                  -
    Decrease (increase) in escrowed cash                                     (3,277)                 1,832                 600
    Capital expenditures paid                                               (26,301)                (7,737)             (2,083)
                                                                           --------               --------            --------
     Net cash used in investing activities                                 (898,337)              (418,256)            (35,401)
                                                                           --------               --------            --------
Cash flows from financing activities:
    Proceeds from issuance of shares, net                                   301,023                305,055              91,297
    Repurchases of Common Shares                                             (1,657)                     -                   -
    Distributions paid to shareholders                                      (51,440)               (18,069)               (510)
    Distributions paid to minority partners                                    (981)                  (448)                 (9)
    Proceeds from note payable to shareholder                                     -                      -               1,392
    Proceeds from mortgage notes payable                                     19,277                    388               9,896
    Repayment of mortgage notes payable                                     (14,669)                (4,485)            (50,873)
    Proceeds from notes payable, Credit Facility                          1,374,467                293,208                   -
    Repayment of notes payable, Credit Facility                            (808,375)              (177,975)                  -
    Purchase of minority interests                                                -                   (531)                  -
    Other debt costs                                                         (4,916)                (1,296)               (921)
                                                                           --------               --------            --------
     Net cash provided by financing activities                              812,729                395,847              50,272
                                                                           --------               --------            --------
(Decrease) increase in cash and cash equivalents                            (16,367)                11,163              17,439
Cash and cash equivalents at beginning of period                             29,442                 18,279                 840
                                                                           --------               --------            --------
Cash and cash equivalents at end of period                                 $ 13,075               $ 29,442            $ 18,279
                                                                           ========               ========            ========

</TABLE>
        The accompanying notes are an integral part of these statements.

                                      F-5
<PAGE>



1. ORGANIZATION AND NATURE OF OPERATIONS:
   --------------------------------------

     Brandywine Realty Trust (collectively with its subsidiaries, the "Company")
is a self-administered and self-managed real estate investment trust (a "REIT").
The Company currently owns a portfolio of real estate assets located primarily
in the Mid-Atlantic Region. As of December 31, 1998, the Company's portfolio
included 201 office properties, 70 industrial facilities and one mixed use
property (collectively, the "Properties") that contain an aggregate of
approximately 18.8 million net rentable square feet. As of December 31, 1998,
the Company also held economic interests in nine office real estate ventures
(the "Real Estate Ventures").

     The Company's interest in the Properties and the Real Estate Ventures is
held through Brandywine Operating Partnership, L.P. (the "Operating
Partnership"). The Company is the sole general partner of the Operating
Partnership and, as of December 31, 1998, the Company held approximately 88.5%
interest in the Operating Partnership and was entitled to 94.6% of the Operating
Partnership's income after distributions to holders of Series B Preferred Units.
The Operating Partnership holds a 95% economic interest in Brandywine Realty
Services Corporation (the "Management Company") through its ownership of 100% of
the Management Company's non-voting preferred stock and 5% of its voting common
stock. As of December 31, 1998, the Management Company was managing and leasing
properties containing an aggregate of approximately 17.1 million net rentable
square feet, of which 16.9 million net rentable square feet related to
properties owned by the Company or subject to purchase options held by the
Company, and approximately 259,000 net rentable square feet related to
properties owned by unaffiliated third parties.

     A majority of the Properties are located within the suburban Philadelphia
office and industrial market. As such, a downturn in business activity in this
market could negatively impact the Company. Management believes the Philadelphia
office and industrial market provides a well-diversified economic base which
helps to mitigate the types of market risks that can adversely affect a
single-sector economy.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
   -------------------------------------------

Principles of Consolidation
- - ---------------------------

     The Company consolidates its accounts and the accounts of the Operating
Partnership and reflects the remaining interest in the Operating Partnership as
minority interest. All significant intercompany transactions have been
eliminated in consolidation. The Company internally evaluates all properties as
one segment and accordingly does not report segment information.

Management's Use of Estimates
- - -----------------------------

     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.

Capitalization of Costs
- - -----------------------

     The Company has capitalized as deferred costs certain expenditures related
to the financing and leasing of the Properties. Capitalized loan fees are being
amortized over the terms of the related loans and leasing commissions are being
amortized over the term of the related leases. Deferred costs are presented net
of accumulated amortization totaling $3.7 million, $2.0 million and $729,000 as
of December 31, 1998, 1997, and 1996, respectively. The Company has capitalized
interest expense related to the development of certain Properties and land
holdings. During the years ended December 31, 1998, 1997 and 1996, capitalized
interest totaled $1.2 million, $62,000 and none, respectively.

                                      F-6
<PAGE>


Real estate investments
- - -----------------------

     Real estate investments are carried at cost, less accumulated depreciation.
It is the Company's policy to review the carrying amounts of long-lived assets
for impairment whenever events or changes in circumstances indicate that the
carrying value of such assets may not be recoverable. Measurement of the
impairment loss is based on the fair value of the asset. Generally, fair value
will be determined using valuation techniques such as the present value of
expected future cash flows. No impairment adjustments have been made as a result
of this review process during 1998, 1997 or 1996.

Depreciation and Amortization
- - -----------------------------

     Depreciation is computed using the straight-line method. Estimated useful
lives range from 25 to 35 years for buildings and improvements and five years
for personal property. Amortization of tenant improvements is provided over the
shorter of the lease term or the life of the assets.

Accounts Receivable
- - -------------------

     Accounts receivable is presented net of allowance for doubtful accounts of
$3.2 million and $582,000 as of December 31, 1998 and 1997, respectively, and
includes straight-line rents receivable of $8.5 million and $2.2 million as of
December 31, 1998 and 1997, respectively.

Income Taxes
- - ------------

     The Company intends to maintain its election to be taxed as a real estate
investment trust under Sections 856-860 of the Internal Revenue Code. In
management's opinion, the requirements to maintain this election are being met.
Accordingly, no provision for Federal income taxes has been reflected in the
financial statements.

     Earnings and profits, which will determine the taxability of distributions
to shareholders, will differ from net income reported for financial reporting
purposes due to differences in cost basis, differences in the estimated useful
lives used to compute depreciation and differences between the allocation of the
Company's net income and loss for financial reporting purposes and for tax
reporting purposes.

     The Company is subject to a 4% Federal excise tax if it does not distribute
a sufficient amount of its taxable income within the prescribed time limits. The
excise tax equals 4% of the annual amount, if any, by which the sum of (a) 85%
of the Company's ordinary income and (b) 95% of the Company's capital gain net
income exceeds cash distributions and certain taxes paid by the Company. No
excise tax was incurred in 1998, 1997 or 1996.

     The Management Company is subject to Federal and state income taxes. The
operating results of the Management Company include a provision for income taxes
of approximately $83,000 and $21,000 for 1998 and 1997, respectively.

Revenue Recognition
- - -------------------

     Rental revenue from tenants is recognized on a straight-line basis over the
term of the lease agreements regardless of when payments are due. The impact of
the straight-line rent adjustment increased revenues by approximately $6.3
million, $1.7 million and $337,000 during the years ended December 31, 1998,
1997 and 1996, respectively. Certain lease agreements contain provisions which
provide for reimbursement of the tenants' share of real estate taxes and certain
common area maintenance costs. These reimbursements are reflected on the accrual
basis.

     No tenant represented 10% or more of the Company's rental revenue in 1998,
1997 or 1996.

                                      F-7
<PAGE>


Fair Value of Financial Instruments
- - -----------------------------------

     The carrying amounts reported in the balance sheet for cash, accrued
liabilities, and short-term borrowings approximate their fair values due to the
short-term nature of these instruments. Accordingly, these items have been
excluded from the fair value disclosures included elsewhere in these notes.

Statements of Cash Flows
- - ------------------------

     For purposes of reporting cash flows, cash and cash equivalents include
cash on hand and short-term investments with original maturities of 90 days or
less.

Reclassifications
- - -----------------

     Certain amounts have been reclassified to conform to the current year
presentation.

Newly Issued Accounting Standards
- - ---------------------------------

Comprehensive Income

         In June 1997, the Financial Accounting Standards Board ("FASB") issued
SFAS No. 130, "Reporting Comprehensive Income". The standard establishes
additional disclosure for the elements of comprehensive income and a total
comprehensive income calculation. Net income as reported by the Company reflects
total comprehensive income for the years ended December 31, 1998, 1997 and 1996.

Accounting for Derivative Instruments and Hedging Activities

     Statement of Financial Accounting Standards No. 133 ("SFAS 133")
"Accounting for Derivative Instruments and Hedging Activities" is effective for
all fiscal years beginning after June 15, 1999, although earlier application is
encouraged. SFAS 133 established accounting and reporting standards related to
financial activities with respect to derivative instruments and hedging. The
Company has not engaged in the practice of using financial derivative
instruments and hedging activities. The Company does not believe that the
implementation of SFAS 133 will have a material impact on the Company's
financial position or results of operations.

3. MINORITY INTEREST:
   ------------------

     Minority interest relates to interests in the Operating Partnership that
are not owned by the Company. Income allocated to the Minority Interest is based
on the percentage ownership of the Operating Partnership held by third parties
throughout the year. Minority interest is comprised of Class A Units of limited
partnership interest ("Class A Units") and Series B Preferred Units of limited
partnership ("Series B Preferred Units"). The Operating Partnership issued these
interests to persons that contributed assets to the Operating Partnership. The
Operating Partnership will, at the request of a holder, be obligated to redeem
each Class A Unit held by such holder, at the option of the Company, for cash or
one Common Share. Each Series B Preferred Unit has a stated value of $50.00 and
is convertible, at the option of the holder, into Class A Units at a conversion
price of $28.00. The conversion price is subject to a reduction to $26.50 if the
average trading price of the Common Shares during the 60-day period ending
December 31, 2003 is $23.00 or lower. The Series B Preferred Units bear a
preferred distribution of 7.25% per annum, subject to an increase in the event
quarterly distributions paid to holders of Common Shares exceed $0.51 per share.
The distributions for the Series B Preferred Units during 1998 were
approximately $1.5 million. As of December 31, 1998, there were 2,158,368
outstanding Class A Units held by holders other than the Company and 1,550,000
outstanding Series B Preferred Units, all held by third party investors.

4. ACQUISITIONS AND DISPOSITIONS OF REAL ESTATE INVESTMENTS:
   ---------------------------------------------------------

     The Company continued its growth in 1998 by purchasing 153 office,
industrial and mixed-use properties containing approximately 11.6 million net
rentable square feet for an aggregate purchase price of approximately $1.3
billion. The 1998 acquisitions expanded the Company's market share in the

                                      F-8
<PAGE>


suburban Philadelphia office and industrial market and expanded the Company's
market presence into several other markets within the Mid-Atlantic Region. The
acquisitions occurred throughout the year through 12 separate transactions.
Three of the 12 transactions aggregated approximately $966.0 million of the $1.3
billion aggregate purchase price of all the 1998 acquisitions. The first of the
three transactions, which closed on January 5, 1998, was a $229.1 million
portfolio purchase of 23 properties containing approximately 2.0 million feet.
The portfolio strengthened the Company's market share in the Philadelphia
suburbs and established operating platforms in Northern New Jersey, Delaware and
Maryland. The second major portfolio acquisition closed on March 31, 1998. This
portfolio contained six properties containing approximately 933,000 square feet
for a purchase price of $137.8 million, and established a market presence in
Central New Jersey. The third major portfolio acquisition closed on September
28, 1998 and significantly broadened the Company's holdings by adding 66
properties, containing approximately 5.5 million square feet, located in the
Philadelphia suburbs; southern New Jersey; Allentown, Pennsylvania; Richmond,
Virginia; and Northern Virginia. The aggregate purchase price was approximately
$599.1 million. The remainder of the 1998 acquisitions combined to increase
market share in suburban Philadelphia and to expand into Wilmington, Delaware;
Harrisburg, Pennsylvania; Northern New Jersey; and Long Island, New York.

     The 1998 acquisitions were financed through a combination of: proceeds
received from four public offerings of an aggregate of approximately 13.3
million Common Shares which raised net proceeds of approximately $301.0 million;
borrowings under the Company's credit facilities; the issuance of approximately
1.8 million Class A Units in the Operating Partnership valued at approximately
$41.0 million; the issuance of 1,550,000 Series B Preferred Units with a stated
value of $77.5 million; and the issuance of 750,000 Series A Preferred Shares
with a stated value of $37.5 million.

     The Company completed the development of three properties in 1998
containing approximately 288,177 net rentable square feet. The Company also sold
an office property located in Ohio containing approximately 156,175 net rentable
square feet for a net sales price of approximately $14.7 million.

     The Company's acquisitions were accounted for by the purchase method. The
results of operations for each of the acquired properties have been included
from the respective purchase dates. All pro forma financial information
presented herein is unaudited and is not necessarily indicative of the results
which actually would have occurred if acquisitions had been consummated on the
respective dates indicated, nor does the pro forma information purport to
represent the results of operations for future periods.

     The following unaudited pro forma financial information of the Company for
the years ended December 31, 1998 and 1997 gives effect to the properties
acquired and the Common Share, Class A Unit, Series B Preferred Unit and
Preferred Share issuances during 1998 as if the purchases and issuances had
occurred on January 1, 1997.
<TABLE>
<CAPTION>


                                                                                              Year Ended December 31,
                                                                                              -----------------------
                                                                                              1998             1997
                                                                                            ---------       ----------
                                                                                           (Unaudited and in thousands,
                                                                                               except per share data)
<S>                                                                                         <C>             <C>
Pro forma total revenues                                                                    $ 266,462       $ 246,792
Pro forma net income before extraordinary items allocated to Common Shares                  $  25,272       $  18,338
Pro forma net income allocated after extraordinary items allocated to Common Shares         $  23,269       $  18,338
Pro forma net income per Common Share before extraordinary items (diluted)                  $    0.67       $    0.50
Pro forma net income per Common Share after extraordinary items (diluted)                   $    0.62       $    0.50
</TABLE>
                                      F-9
<PAGE>

1997                            
- - ----

     During 1997, the Company acquired 80 properties (61 office properties and
19 industrial facilities) containing an aggregate of approximately 5.1 million
net rentable square feet. The aggregate purchase price for the 1997 property
acquisitions was $403.7 million, consisting of $378.3 million of cash, debt
assumption of $15.9 million and $9.5 million in Class A Units.

     The following unaudited pro forma financial information of the Company for
the years ended December 31, 1997 and 1996 gives effect to the properties
acquired during 1997 and 1996 as if the purchases and Common Share issuances had
occurred on January 1, 1996.

<TABLE>
<CAPTION>
                                                                        Year Ended December 31,
                                                                        -----------------------
                                                                          1997           1996
                                                                        -------        --------
                                                                    (Unaudited and in thousands,
                                                                       except per share data)
<S>                                                                     <C>            <C>
Pro forma total revenues                                                $94,856        $86,309
Pro forma net income allocated to Common Shares                         $23,890        $15,450
Pro forma net income per Common Share                                   $  1.02        $  0.69
</TABLE>


1996
- - ----

     The Company acquired 33 properties in 1996 (30 office properties and three
industrial facilities) containing an aggregate of approximately 1.7 million net
rentable square feet. The aggregate purchase price for the 1996 property
acquisitions was $139.7 million, consisting of $36.6 million of cash, debt
assumption of $63.6 million and $39.5 million in Class A Units, Common Shares
and warrants.

     The following unaudited pro forma financial information of the Company for
the years ended December 31, 1996 and 1995 gives effect to the properties
acquired during 1996 as if the purchases had occurred on January 1, 1995.

<TABLE>
<CAPTION>
                                                                        Year Ended December 31,
                                                                        -----------------------
                                                                          1996           1995
                                                                        -------        --------
                                                                    (Unaudited and in thousands,
                                                                       except per share data)
<S>                                                                     <C>            <C>
Pro forma total revenues                                               $ 25,614       $ 22,845
Pro forma net income (loss) allocated to Common Shares                 $    632        $(1,243)
Pro forma net income (loss) per Common Share                           $   0.09        $ (0.18)
</TABLE>

5. MANAGEMENT COMPANY
   ------------------

     On August 22, 1996, the Management Company commenced operations and is
responsible for various activities including: management, leasing, construction,
redevelopment and development of the Company's Properties and properties on
behalf of third parties as well as providing other real estate related services
for third parties. Investment in the Management Company is accounted for using
the equity method. Total management fees paid by the Company's Properties to the
Management Company are included in management fee expense in the accompanying
statements of operations and amounted to $6.7 million during 1998, $2.3 million
during 1997 and $263,000 for the period from August 22, 1996 to December 31,
1996. The Management Company also receives payments of certain costs
attributable to the operation of the Properties. Such reimbursements are
included in property operating expenses in the accompanying statements of
operations and amounted to $5.3 million during 1998, $1.9 million during 1997
and $147,000 for the period from August 22, 1996 to December 31, 1996.

                                      F-10
<PAGE>

Summarized unaudited financial information for the Management Company as of
December 31, 1998, 1997 and 1996, for the years ended December 31, 1998 and
December 31, 1997 and for the period from August 22, 1996 to December 31, 1996
is as follows: 
<TABLE>
<CAPTION>

                                                               Year Ended December 31,
                                                   -----------------------------------------------
                                                     1998              1997                  1996
                                                   --------          --------             --------
                                                               (Unaudited and in thousands)

<S>                                                <C>                 <C>                   <C>  
Total assets                                       $  1,763            $   924               $ 345
Total revenue                                      $ 13,011            $ 5,077               $ 301
Net income (loss)                                  $     77            $    93               $ (42)
Company's share of net income (loss)               $     74            $    89               $ (26)
</TABLE>


6. INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES
   -------------------------------------------------

     The Company accounts for its non-controlling interests in Real Estate
Ventures using the equity method of accounting. Non-controlling ownership
interests range from 35% to 65%. These investments are recorded initially at the
Company's cost and subsequently adjusted for the Company's net equity in income
or loss and cash contributions and distributions.
<TABLE>
<CAPTION>

                                                                                                                Company's Share
                                                                                          Real Estate          of Venture Income
                                                                       Carrying             Venture            For the Year Ended
                                                    Percent             Amount            Debt at 100%         December 31, 1998
                                                   Ownership        (in thousands)       (in thousands)          (in thousands)
                                                   ---------        --------------       --------------          --------------
                                                                                                             
<S>                                                   <C>              <C>                   <C>                      <C>  
Two Tower Bridge Associates                           35%              $  2,784              $  7,711                 $  61
Four Tower Bridge Associates                          65%                   438                14,002                     -
Six Tower Bridge Associates                           50%                   441                     -                     -
Christiana Center Operating Company I, LLC            50%                 2,098                13,036                    83
Christiana Center Operating Company II, LLC           50%                 1,066                     -                     -
Interstate 202, G.P.                                  50%                 2,733                 1,750                     -
1000 Chesterbrook Boulevard Partnership               50%                 1,043                     -                     -
                                                                       --------              --------                 -----
                                                                       $ 10,603              $ 36,499                 $ 144
                                                                       ========              ========                 =====
</TABLE>

     As of December 31, 1998, the Company intends on making equity contributions
to Real Estate Ventures under development totaling approximately $13.9 million
of which $4.2 million was contributed as of December 31, 1998. The Company had
guaranteed repayment of an aggregate of approximaely $17.3 million of
consruction loans made to two Real Estate Ventures (a portion of which guaranty
was in the form of a commitment to contribute approximately $6.8 million in
equity to the borrower). Payment under these guaranties would constitute loan
obligations of, or preferred equity positions in, the applicable Real Estate
Venture.

     The Company has advanced approximately $4.3 million to a Real Estate
Venture. The loan bears interest at 10%. The Company has an option to convert
this loan into a capital contribution after certain conditions have been met.

7. INDEBTEDNESS 
   ------------

Borrowings under Credit Facilities   --

     The Company utilizes credit facility borrowings for general business
purposes, including the acquisition of office and industrial properties and the
repayment of certain outstanding debt. At December 31, 1997, the Company had a
$150.0 million secured credit facility (the "1997 Credit Facility"). The 1997
Credit Facility was secured by 39 of the Properties and bore interest at a per
annum floating rate equal to the Company's choice of 30, 60 or 90-day LIBOR
plus 175 basis points.

                                      F-11
<PAGE>


     During the first quarter of 1998, the Company replaced the 1997 Credit
Facility with a $330.0 million unsecured revolving credit facility (the "1998
Credit Facility"). The Company wrote off $858,000 of unamortized deferred
financing costs relating to the 1997 Credit Facility which has been accounted
for as an extraordinary item in the statement of operations. The 1998 Credit
Facility enabled the Company to borrow funds at a reduced interest rate equal to
the 30, 60, 90 or 180-day LIBOR, plus, in each case, a range of 100 to 137.5
basis points, depending on the Company's then existing leverage and debt rating.
Alternatively, the Company could have borrowed funds at a base rate equal to the
higher of the Prime Rate or the Fed Funds Rate plus 50 basis points.

     During the second quarter of 1998, the Company entered into a $150.0
million unsecured credit facility (the "Additional Facility") to finance
certain of the Company's property acquisitions. Amounts repaid by the Company
under the Additional Facility were not subject to reborrowing.

     During the third quarter of 1998, the Company replaced the 1998 Credit
Facility with a new revolving credit facility of $550.0 million (the "New 1998
Credit Facility"). The New 1998 Credit Facility is currently unsecured, but will
convert to a secured facility if certain leverage requirements are not met by
March 31, 1999. The Company wrote off approximately $1.1 million of unamortized
deferred financing costs related to the 1998 Credit Facility which has been
accounted for as an extraordinary item in the statement of operations. The
interest rate borne by the New 1998 Credit Facility was LIBOR plus 150 basis
points initially, with the spread over LIBOR subject to reductions of from 12.5
to 35 basis points and a possible increase of 25 basis points based on the
Company's leverage. The spread over LIBOR may also be reduced to either 115 or
100 basis points depending on the Company's long term debt rating. The New 1998
Credit Facility matures in September 2001 and requires the Company to maintain
ongoing compliance with a number of customary financial and other covenants,
including leverage ratios and debt service coverage ratios, limitations on liens
and distributions and a minimum net worth requirement. At December 31, 1998, the
Company had approximately $531.3 million of indebtedness outstanding under the
New 1998 Credit Facility.

     During the third quarter of 1998, the Company also replaced the Additional
Facility with a new $150.0 million unsecured credit facility (the "New
Additional Facility") which bears interest at LIBOR plus 200 basis points and is
payable in full on March 31, 1999. Amounts repaid under the New Additional
Facility are not subject to reborrowing. The New Additional Facility contains
financial and other covenants that are identical to those applicable to the New
1998 Credit Facility. At December 31, 1998, the Company had approximately $150.0
million of indebtedness outstanding under the New Additional Facility.

     Borrowings under the New 1998 Credit Facility and the New Additional
Facility were primarily used to fund the costs of acquiring properties. For the
year ended December 31, 1998, the weighted average interest rate for borrowings
under the Company's credit facilities was 7.05%.

     In January 1999, the Company obtained a $119.0 million, five year loan from
two financial institutions. The loans have a fixed interest rate of 7.18% and
are secured by four properties. The proceeds were used to reduce the New
Additional Facility by $80.0 million and to fund working capital.

Mortgage Notes Payable  --

      Mortgage loans encumbered 84, 20 and 18 of the Properties as of December
31, 1998, 1997 and 1996, respectively. Additionally, as of December 31, 1998,
mortgage loans encumbered certain of the Company's land holdings. Interest rates
on the mortgage loans ranged from 5.0% to 9.9% and had weighted average interest
rates of 7.6%, 8.3% and 8.4% during 1998, 1997 and 1996 respectively.

     Included in mortgage notes payable are non-interest bearing loans which
have an imputed 8% interest rate. On December 31, 1998, 1997 and 1996, these
loans totaled $2.3 million, $3.8 million and $4.8 million, respectively, with
unamortized discounts of $280,000, $254,000 and $587,000, respectively.
Amortization of the discounts aggregated $234,000, $333,000 and $63,000 during
1998, 1997 and 1996, respectively.

                                      F-12
<PAGE>

Aggregate principal payments on mortgage notes payable and credit facilities at
December 31, 1998 are due as follows:
<TABLE>
<CAPTION>

                                       Mortgage
                                        Notes            Credit
                                       Payable          Facilities             Total
                                  -------------       ------------      --------------
<S>                               <C>                 <C>               <C>
           1999                   $  40,781,000       150,000,000          190,781,000
           2000                       7,364,000                 -            7,364,000
           2001                      31,829,000       531,325,000          563,154,000
           2002                      16,797,000                 -           16,797,000
           2003                       3,494,000                 -            3,494,000
   2004 and thereafter              218,970,000                 -          218,970,000
                                  -------------       -----------        -------------
                                  $ 319,235,000       681,325,000        1,000,560,000
                                  -------------       -----------        -------------
</TABLE>

     As of December 31, 1998, the Company was in compliance with all debt
covenants. During the years ended December 31, 1998, 1997, and 1996, interest
paid totaled $35.0 million, $6.1 million and $2.8 million respectively. The
carrying values of the Company's debt at December 31, 1998 exceeded their
respective fair values by approximately $6.5 million, as determined by using
year end interest rates and market conditions.

                                      F-13
<PAGE>
8. SHARES, WARRANTS AND OPTIONS:
   -----------------------------

The following table summarizes the Company's activity relative to Common Shares,
warrants and options:
<TABLE>
<CAPTION>

                                                                    Number of                Number of
                                                       Date of        Common     Share        options/      Exercise  Proceeds (in
   Type of issuance              Investor             issuance      Shares (a)   Price        warrants       Price    thousands)(b)
- - --------------------------  -----------------        ---------      ----------   ------     ------------    --------  -------------
    1998 Activity
- - ---------------------------------------------
<S>                         <C>                 <C>  <C>          <C>            <C>         <C>              <C>          <C>
Expiration of options              SERS         (g)    11/1/98                               (133,333)(c)         -            -
Repurchases                                                 (d)       (86,744)     (d)             -              -            -
Trustee Fees (f)                 Trustees               5/8/98          1,248     $   -            -              -            -
Share Offering                    Public               4/21/98        625,000     $ 24.00          -              -          14,250
Share Offering                    Public                3/6/98      1,000,000     $ 24.00          -              -          22,770
Share Offering                    Public               2/27/98        629,921     $ 23.81          -              -          14,325
Share Offering                    Public               2/18/98      1,012,820     $ 24.06          -              -          23,152
Share Offering                    Public                2/4/98     10,000,000     $ 24.00          -              -         227,700
Unit redemption                  Various               6/30/98          1,434         -            -              -             -
Unit redemption                Scarborough             6/22/98         50,000         -            -              -             -
Unit redemption           Safeguard Scientifics         1/6/98        252,387         -            -              -             -
Employee share awards       Company employees           1/2/98        438,274         -            -              -             -
Employee share options      Company employees           1/2/98           -            -           748,874      $ 29.04          -
Employee share options      Company employees           1/2/98           -            -           740,796      $ 27.78          -
Employee share options      Company employees           1/2/98           -            -           554,034      $ 25.25          -
                                                                   ----------                   ---------                 ---------
                                                                   13,924,340                   1,910,371                 $ 302,197
                                                                   ----------                   ---------                 =========

    1997 Activity:
- - ---------------------------------------------
Share offering                Public                    3/4/97      2,200,000     $ 20.63          -              -        $ 42,999
Share offering (e)            Public                   3/17/97        175,500     $ 20.63          -              -           3,430
Share offering                Public                   7/28/97     10,000,000     $ 20.75          -              -         196,600
Share offering (e)            Public                   8/20/97      1,500,000     $ 20.75          -              -          29,490
Trustee fees (f)              Trustees                  9/2/97          1,284         -            -              -             -
Share offering                Public                   9/16/97        786,840     $ 22.31          -              -          16,679
Share offering                Public                  12/23/97        751,269     $ 24.63          -              -          17,668
Preferred share conversion    SERS (g)                 Various      1,606,060 (h)     -            -              -             -
Unit redemptions (i)          Various                  Various         53,122         -            -              -             -
                                                                   ----------                   ---------                 ---------
                                                                   17,074,075                      -                      $ 306,866
                                                                   ----------                   ---------                 =========
    1996 Activity:
- - ---------------------------------------------
Share offering                RMO (j)                  6/21/96         19,983     $ 16.89 (k)      19,983      $ 19.50    $     338
Share offering                Safeguard Scientifics    8/22/96        258,333     $ 16.50         258,333      $ 19.50          -
Employee share options        Company employees        8/22/96            -           -           243,333      $ 19.50          -
Share offering                RMO (j)                  8/23/96         14,135     $ 16.89 (k)      14,135      $ 19.50          239
Preferred share offering      SERS (g)                11/14/96            -   (h) $ 16.50         133,333      $ 25.50       26,500
Share offering                RMO (j)                 11/15/96         46,321     $ 16.89 (k)      46,321      $ 19.50          782
Share offering                Morgan Stanley           12/2/96        709,090     $ 16.50          -              -          11,700
Share offering                SERS (g)                 12/2/96        636,363     $ 16.50          -              -          10,500
Share offering                Public                   12/2/96      4,000,000     $ 16.50          -              -          61,880
Share offering (e)            Public                  12/13/96        600,000     $ 16.50          -              -           9,282
Unit Redemptions (i)          Various                  Various        110,282         -            -              -             -
                                                                   ----------                   ---------                 ---------
                                                                    6,394,507                     715,438                 $ 121,221
                                                                   ----------                   ---------                 =========

  Amounts outstanding as of January 1, 1996
- - ---------------------------------------------
Shares outstanding            Public                    1/1/96        618,733                      -               -
Employee share options        Company employees         8/1/94            -                        33,333      $ 14.31
Employee share options        Company employees         8/1/94            -                        13,334      $  6.21
                                                                   ----------                   ---------
                                                                      618,733                      46,667
                                                                   ----------                   ---------
Total outstanding as of December 31, 1998                          38,011,655                   2,672,476
                                                                   ==========                   =========
</TABLE>
(a) During 1996, the Company effected a one-for-three reverse share split of its
    Common Shares. All share and per share amounts have been presented on a
    post-split basis.

(b) Proceeds are net of underwriter's discounts and before deducting other
    expenses, if any.

(c) In November 1998, 133,333 options granted to SERS expired.

(d) Pursuant to the share repurchase plan approved by the Board during 1998,
    permitting the Company to purchase up to 2,000,000 Common Shares, the
    Company repurchased 86,744 of its Common Shares on the open market between
    August 11, 1998 and September 2, 1998 for prices ranging from $17.75 per
    share and $20.125 per share.


<PAGE>

(e) These offerings were pursuant to the exercise of underwriters'
    over-allotment options.

(f) The Company issued Common Shares as partial payment of annual fees to
    non-employee Trustees.

(g) SERS represents the Commonwealth of Pennsylvania State Employees' Retirement
    System.

(h) On November 14, 1996, the Company issued 481,818 Series A Preferred Shares
    of beneficial interest. During 1997, the preferred shares were converted
    into 1,606,060 Common Shares.

(i) Unit Redemptions represent Common Shares issued upon redemption of Units.

(j) RMO represents an investment fund controlled by Richard M. Osborne, a former
    Trustee of the Company.

(k) Indicated price represents the aggregate per share value of the Common
    Shares and warrants issued.

                                      F-14
<PAGE>

     As of December 31, 1998, 750,000 Preferred Shares of the Company were
outstanding. Each Preferred Share has a stated value of $50.00 and is
convertible at the option of the holder into Common Shares at a conversion price
of $28.00. The conversion price is subject to reduction to $26.50 if the trading
price of the Common Shares during the 60-day period ending December 31, 2003 is
$23.00 or lower. The Preferred Shares bear a preferred distribution of 7.25% per
annum, subject to an increase in the event quarterly distributions paid to
holders of Common Shares exceeds $0.51 per share.

     At December 31, 1998, the Company had "restricted" Common Shares in
aggregate of 438,274 to five of the Company's executives. These restricted
shares vest over five to eight year periods and were valued at approximately
$11.1 million at the date of issuance (based on the closing price of Common
Shares on January 2, 1998).

     The Company has reserved, as of December 31, 1998, 2,672,476 Common Shares
for issuance upon the exercise of share options and warrants described above. At
December 31, 1998, 1,056,287 options and warrants were exercisable. With the
exception of options issued to Company executives in 1998, all options and
warrants were granted with an exercise price equal to the fair market value on
the date of grant. The 1998 options to Company executives were issued with
exercise prices ranging from fair market value on the date of grant to 115% of
fair market value on the date of grant. At December 31, 1998, outstanding
options and warrants had a weighted average remaining contractual life of 7.8
years, an average exercise price of $25.53 per share and an aggregate purchase
price of $68.2 million.

     During 1996, the Company adopted a new stock-based compensation accounting
standard, "Accounting for Stock-Based Compensation" ("SFAS No. 123"). SFAS No.
123 encourages a fair value method of accounting for employee stock options and
similar equity instruments. The statement also allows an entity to continue to
account for stock-based compensation using the intrinsic value based method in
APB Opinion No. 25. As provided for in the statement, the Company elected to
continue the intrinsic value method of expense recognition. If compensation cost
for the warrants and options granted to executive officers and other employees
during 1996 and 1998 had been determined using the fair value method prescribed
by SFAS No. 123, the Company's net earnings and earnings per share would have
been the pro forma amounts indicated below:
<TABLE>
<CAPTION>


                                                 Year ended December 31,
                                    ---------------------------------------------------
                                        1998            1997              1996
                                        ----            ----              ----
                                 (unaudited and in thousands, except per share data)
<S>                                  <C>              <C>              <C>
Net income (loss):
     As reported                     $ 32,323         $ 14,502         $  (563)
     Pro forma                       $ 31,676         $ 14,502         $  (894)
Earnings (loss) per common share:
     As reported
         Basic                       $   0.90         $   0.96         $ (0.44)
         Diluted                     $   0.89         $   0.95         $ (0.44)
     Pro forma
         Basic                       $   0.88         $   0.96         $ (0.69)
         Diluted                     $   0.88         $   0.95         $ (0.69)
</TABLE>

     The pro forma effect on results may not be representative of the impact in
future years because the fair value method was not applied to options granted
before 1995.

                                      F-15
<PAGE>

     The weighted average fair value of each option issued in 1998 and the
assumptions used in estimating the fair value on the grant date using the
Black-Scholes option pricing model are as follows:
<TABLE>
<CAPTION>

                                                                    Other
                                  Executive officers               employees
                            -----------------------------          ----------
<S>                         <C>         <C>         <C>            <C>    
Exercise Price              $ 25.25     $ 27.78     $29.04         $ 27.78
Fair Value of Options       $  2.66     $  2.14     $ 1.94         $  2.14
Expected life in years           10          10         10              10
Risk-free interest rate         5.8%        5.8%       5.8%            5.8%
Volatility                     18.7%       18.7%      18.7%           18.7%
Dividend yield                  6.8%        6.8%       6.8%            6.8%
</TABLE>

     The weighted average fair value of each option issued in 1996 and the
assumptions used in estimating the fair value on the grant date using the
Black-Scholes option pricing model are as follows:

                                      Executive      Other
                                      officers     employees
                                      ---------    ---------
Exercise Price                        $ 19.50       $ 19.50
Fair Value of the Options             $  1.38       $  1.13
Expected life in years                      5             3
Risk-free interest rate                   6.0%          6.0%
Volatility                               17.5%         17.5%
Dividend yield                            7.0%          7.0%


9. NET INCOME (LOSS) PER COMMON SHARE:
   -----------------------------------

     In February 1997, the Financial Accounting Standards Board issued Statement
No. 128, "Earnings per Share" ("SFAS 128"). SFAS 128 establishes standards for
computing and presenting earnings per share ("EPS"). Basic earnings per share
are based on the weighted average number of Common Shares outstanding during the
year. Diluted earnings per share are based on the weighted average number of
Common Shares outstanding during the year adjusted to give effect to common
share equivalents. All per share amounts for all periods presented have been
restated to conform to SFAS 128. A reconciliation between basic and diluted EPS
is shown below (in thousands, except common share and per common share data).
<TABLE>
<CAPTION>



                                                                         For the year ended December 31,
- - -----------------------------------------------------------------------------------------------------------------------------------
                                                           1998                         1997                         1996
                                                -------------------------   --------------------------    ------------------------
                                                    Basic        Diluted        Basic         Diluted         Basic       Diluted
                                                -----------   -----------   -----------    -----------    ----------    ----------
<S>                                             <C>           <C>           <C>            <C>            <C>           <C>
Net income (loss)                               $    33,025   $    33,025   $    15,001    $    15,001    $     (162)   $     (162)
Income allocated to Preferred Shares                   (702)         (702)         (499)             -          (401)         (401)
                                                -----------   -----------   -----------    -----------    ----------    ----------
Income (loss) available to common shareholders  $    32,323   $    32,323   $    14,502    $    15,001    $     (563)   $     (563)
                                                -----------   -----------   -----------    -----------    ----------    ----------
Weighted average shares outstanding              36,073,773    36,073,773    15,030,002     15,030,002     1,289,704     1,289,704
Preferred Shares                                          -             -             -        686,214             -             -
Options and warrants                                      -        63,580             -         77,113             -             -
                                                -----------   -----------   -----------    -----------    ----------    ----------
Total weighted average shares outstanding        36,073,773    36,137,353    15,030,002     15,793,329     1,289,704     1,289,704
                                                -----------   -----------   -----------    -----------    ----------    ----------
Earnings (loss) per share                       $      0.90   $      0.89   $      0.96    $      0.95    $    (0.44)   $    (0.44)
                                                ===========   ===========   ===========    ===========    ==========    ==========
</TABLE>
                                      F-16
<PAGE>


10. DISTRIBUTIONS:  
    --------------
<TABLE>
<CAPTION>

                                                       1998           1997          1996    
                                                     ---------     ---------     ---------
<S>                                                  <C>           <C>           <C>
Common Share Distributions:
- - ---------------------------
  Distributions declared - per share                 $   1.52      $   1.44      $   0.82 
  Percentage classified as ordinary income              100.0%         82.0%         11.5% 
  Percentage classified as return of capital              0.0%         18.0%         88.5% 
  Classified as ordinary income - per share          $   1.52      $   1.18      $   0.09 
  Classified as return of capital - per share        $     -       $   0.26      $   0.73 

Preferred Share Distributions:
- - ------------------------------
  Distributions declared                             $702,095      $499,000      $401,000 
</TABLE>


11. RELATED-PARTY TRANSACTIONS:
    ---------------------------

     During 1996, the Company consummated a transaction (the "SSI/TNC
Transaction") in which the Company acquired substantially all of the real estate
holdings of Safeguard Scientifics, Inc. ("SSI") and SSI's real estate affiliate,
The Nichols Company ("TNC"), then a private real estate development and
management services company. The then President of TNC, Anthony A. Nichols, Sr.
and the Chairman and Chief Executive Officer of SSI, Warren V. Musser, became
members of the Company's Board of Trustees.

     In March 1997, the Company acquired a parcel of undeveloped land from
Horsham Valley, Inc., an entity in which Mr. Nichols, Sr. holds an approximate
25% interest. The purchase price of approximately $1.0 million was determined
through arm's-length negotiation between the Company and the seller.

     At the closing of the SSI/TNC Transaction, the Operating Partnership
acquired an option from an affiliate of TNC entitling it to acquire, in the
Operating Partnership's discretion, four properties containing an aggregate of
approximately 159,000 net rentable square feet (collectively, the "Option
Properties") at any time during the two-year period ending August 22, 1998
(subject to two extensions of one year each). The Operating Partnership
exercised the first of the two extensions resulting in a one year extension to
August 22, 1999. The parties have agreed that the purchase price payable by the
Operating Partnership upon exercise of its option will consist of $10.00 in
excess of the mortgage debt encumbering the Option Properties at the time of
exercise (which as of December 31, 1998 aggregated $21.2 million). Exercise of
the option is subject to a right of first refusal in favor of, and the consent
of, the holder of the mortgage encumbering the Option Properties. There can be
no assurance that the Company will exercise its option or that the holder of
such mortgage will consent to the exercise of the option.

     In August 1997, the Company satisfied obligations of TNC (a company
controlled by Mr. Nichols, Sr.) on account of brokerage commissions and tenant
improvements. In exchange, TNC transferred to the Company 28,944 Units.

     Walter D'Alessio, a member of the Company's Board of Trustees, is President
of Legg Mason Real Estate Services, Inc., a mortgage banking firm and a
subsidiary of Legg Mason, Inc. Legg Mason, Inc. is the parent of Legg Mason Wood
Walker, Incorporated, which was an underwriter in three of the four public
offerings of Common Shares consummated by the Company between January 1, 1998
and the date of this Annual Report.

     Mr. D'Alessio is a director of PECO Energy Company. In December 1997, the
Company acquired an office property from PECO Energy Company for a purchase
price of $9.5 million. The Company's Trustee was not a participant in the
committee which made the decision to purchase the property and negotiated the
related terms of the transaction.

                                      F-17
<PAGE>


     On July 29, 1998, the Company acquired approximately 23 acres of
undeveloped land in Horsham Township, Montgomery County, Pennsylvania for
approximately $3.5 million. The seller was LC/N Keith Valley Partnership II. The
purchase price was paid in cash. The purchase price for the property was
determined by negotiation between the Company and the seller. Mr. Nichols, Sr.,
the Company's chairman, holds approximately a 25% indirect interest in the
seller.

     On September 28, 1998, the Company consummated a transaction (the "Lazard
Transaction") in which it acquired a portfolio of 67 office, industrial and
mixed use properties from LFREI and its affiliates. The Company had effective
control over four of the properties acquired, and actual title is expected to be
transferred by the end of the first quarter. Murry N. Gunty, one of the
principals of LFREI, became a member of the Board of Trustees on September 28,
1998. In connection with the Lazard Transaction, the Company agreed to acquire
an additional office property for $20.0 million payable through the issuance of
Series B Preferred Units of the Operating Partnership. In connection with the
Lazard Transaction, the Company also obtained an option to acquire an office
property currently under construction for $68.0 million in cash. In the Lazard
Transaction, an LFREI affiliate acquired Series B Preferred Units having a
stated value of $3.0 million in exchange for a $3.0 million promissory note that
bears interest at 7.25% and matures on September 30, 1999. The Company may elect
to use this note to pay a portion of the exercise price for a property in which
the Company holds a purchase option.

     On October 6, 1998, the Company consummated a transaction (the "Axinn
Transaction") in which it acquired a portfolio of 22 office and industrial
properties from the Donald E. Axinn Companies and affiliates. Mr. Axinn became a
member of the Board of Trustees on October 6, 1998. In connection with the Axinn
Transaction, the Company agreed to acquire an additional six office properties
containing an aggregate of approximately 983,053 net rentable square feet for an
aggregate purchase price of $63.1 million, upon satisfaction of certain
conditions. On December 28, 1998, the Company acquired one of these properties
for $11.0 million in cash.

     On October 20, 1998, the Operating Partnership loaned employees an
aggregate of approximately $2.4 million to fund the purchase of 130,428 Common
Shares in the open market. The loans are full recourse and mature in five years.
The interest on the loans is due quarterly and the rate is based on the lower of
the Company's existing interest rate on credit facility borrowings or the
Company's dividend yield.

     In January 1999, the Operating Partnership agreed to loan executive
officers of the Company an aggregate of approximately $81,107 to fund tax
withholding payments due in connection with certain year-end bonuses. These
loans are full recourse, bear interest at approximately 5% and mature on
December 31, 1999.

                                      F-18
<PAGE>

12. OPERATING LEASES:
    -----------------

     The Company leases its properties to tenants under operating leases with
various expiration dates extending to the year 2017. At December 31, 1998,
leases covering approximately 2.1 million square feet or 11% of the net leasable
space were scheduled to expire during 1999. Gross minimum future rentals and
accrued rental income on noncancelable leases at December 31, 1998 are as
follows (in thousands):
<TABLE>
<CAPTION>

                                                                       Total
                                 Cash            Accrued            accrual basis
          Year                  rentals       rental income         rental income
          ----                  -------       -------------         -------------
<S>                            <C>              <C>               <C>
          1999                    209,869           6,721              216,590
          2000                    187,267           2,725              189,992
          2001                    154,992             633              155,625
          2002                    122,204            (651)             121,553
          2003                     93,235          (2,061)              91,174
   2004 and thereafter            309,545         (15,859)             293,686
                              -----------        --------          -----------
                              $ 1,077,112        $ (8,492)         $ 1,068,620
                              ===========        ========          ===========
</TABLE>


     The total minimum future rentals presented above do not include amounts
that may be received as tenant reimbursements for charges to cover increases in
certain operating costs.

13. SUMMARY OF INTERIM RESULTS (UNAUDITED):
    ---------------------------------------

     The following summary interim financial information is unaudited and
presented in thousands, except per share data:
<TABLE>
<CAPTION>

                                                                1st             2nd               3rd          4th
                                                              quarter         quarter           quarter       quarter
                                                               1998             1998             1998          1998
                                                               ----             ----             ----          ----
<S>                                                         <C>               <C>              <C>            <C>     
Total revenue                                               $ 33,102          $ 43,130         $ 47,256       $ 69,373
Net income before extraordinary item                           8,803            10,422            9,559          6,244
     Basic                                                  $   0.28          $   0.28         $   0.25       $   0.15
     Diluted                                                $   0.28          $   0.28         $   0.25       $   0.15
Net income after extraordinary item                            7,945            10,422            8,414          6,244
     Basic                                                  $   0.25          $   0.28         $   0.22       $   0.15
     Diluted                                                $   0.25          $   0.28         $   0.22       $   0.15
Earnings before interest, depreciation and amortization(a)    21,405            27,943           30,199         44,075
Income allocated to Common Shares                              7,945            10,422            8,392          5,564



                                                                1st              2nd               3rd           4th
                                                              quarter          quarter           quarter       quarter
                                                               1997              1997             1997          1997
                                                               ----              ----             ----          ----
Total revenue                                               $  8,598          $ 12,120         $ 18,121       $ 22,221
Net income                                                     2,050             1,658            4,748          6,545
Basic net income per Common Share                           $   0.20          $   0.17         $   0.25       $   0.28
Diluted net income per Common Share                         $   0.20          $   0.15         $   0.25       $   0.28
Earnings before interest, depreciation and amortization(a)     5,429             7,287           10,945         14,384
Income allocated to Common Shares                              1,551             1,658            4,748          6,545

</TABLE>

(a) Earnings before interest, depreciation and amortization excludes gains on
    sale of interests in real estate, minority interest and extraodinary items.

The summation of quarterly earnings per share amounts do not necessarily equal
year to date amounts.

                                      F-19
<PAGE>


14. SUMMARY OF COMMITMENTS AND CONTINGENCIES:
    -----------------------------------------

Legal Proceedings

     The Company is involved from time to time in litigation on various matters,
which include disputes with tenants and disputes arising out of agreements to
purchase properties. Given the nature of the Company's business activities,
these lawsuits are considered routine to the conduct of its business. The result
of any particular lawsuit cannot be predicted, because of the very nature of
litigation, the litigation process and its adversarial nature, and the jury
system.

     As of the date of this filing, the Company is a defendant in case in which
the plaintiffs allege that the Company breached its obligation to purchase a
portfolio of properties for approximately $83.0 million. The plaintiffs'
allegations assert claims for reformation, breach of contract, breach of duty of
good faith and fair dealing, fraud, violation of the New Jersey Consumer Fraud
Statute and unjust enrichment. The Company believes that the plaintiff failed to
satisfy the conditions precedent to the Company's obligation to close under the
agreement and has moved to dismiss all of the plaintiff's claims. As of the date
of this filing, the court has not ruled on the Company's motion to dismiss
plaintiffs' claims, and discovery has not commenced.

     As of December 31, 1998, the Company also owned or held options to purchase
approximately 457.0 acres of land for future development.

Letters of Credit and Other Commitments

     In connection with certain mortgages, the Company is required to maintain
leasing and capital reserve accounts with the mortgage lender through letters of
credit which totaled $12.1 million at December 31, 1998. The Company is also
required to maintain escrow accounts for taxes, insurance and tenant security
deposits which amounted to $3.5 million at December 31, 1998. The related tenant
rents are deposited into the loan servicer's depository accounts, which are used
to fund debt service, operating expenses, capital expenditures and the escrow
and reserve accounts as necessary. The excess cash is included in cash and cash
equivalents on the accompanying balance sheet at December 31, 1998.

     As of December 31, 1998, the Company also owned or held options to purchase
approximately 457.0 acres of land for future development.

15. SUBSEQUENT EVENT:
    ----------------


     On March 26, 1999, the Company obtained a $75.0 million, three year loan.
The loan has a floating interest rate of LIBOR plus 250 basis points and is
secured by five properties. The net proceeds were primarily used to repay the
remaining $70.0 million borrowed under the New Additional Facility.

                                      F-20
<PAGE>


                             Brandywine Realty Trust

                                   Schedule II

                        Valuation and Qualifying Accounts

                                 (in thousands)

<TABLE>
<CAPTION>
                                                                   Additions
                                             Balance at           -----------                           Balance
                                              Beginning           Charged to                            at End
             Description                      of Period            expense          Deductions         of Period
- - -----------------------------------          -----------          ----------        -----------        ----------
<S>                                           <C>                 <C>                 <C>               <C>
Allowance for possible losses:

     Year ended December 31, 1998             $ 582               $ 2,710             $ 120             $ 3,172
                                              =====               =======             =====             =======
     Year ended December 31, 1997             $  40               $   542             $   -             $   582
                                              =====               =======             =====             =======
     Year ended December 31, 1996             $   -               $    40             $   -             $    40
                                              =====               =======             =====             =======
</TABLE>

                                      F-21
<PAGE>

                             BRANDYWINE REALTY TRUST
          Real Estate and Accumulated Depreciation - December 31, 1998
                                 (in thousands)
<TABLE>
<CAPTION>

                                                                                                                                    
                                                                                                        Initial Cost                
                                                                                          ----------------------------------------- 

                                                                                                                          Net
                                                                                                                     Improvements   
                                                                                                                     (Retirements)  
                                                                      Encumberances at                Building and       Since      
         Property Name                      City          State      December 31, 1998      Land      Improvements    Acquisition   
- - -------------------------------------  ----------------   -------   --------------------  ----------  -------------  -------------- 
<S>                                    <C>                <C>              <C>               <C>         <C>           <C>          
Three Greentree Centre                 Marlton            NJ                $ 9,558  (c)      $ 323        $ 6,024      $   188     
Two Greentree Centre                   Marlton            NJ                      -  (c)        264          4,693           55     
One Greentree Centre                   Marlton            NJ                      -  (c)        345          4,440           60     
5910 -6090 Six Forks                   Raleigh            NC                      -  (c)      2,194          3,324          318     
700 Business Center Drive              Horsham            PA                      -             550          2,201          139     
800 Business Center Drive              Horsham            PA                      -             896          3,585           62     
One Progress Avenue                    Horsham            PA                      -           1,404          5,629          114     
500 Enterprise Road                    Horsham            PA                      -           1,303          5,188            8     
1155 Business Center Drive             Horsham            PA                      -           1,029          4,124          (28)    
650 Dresher Road                       Horsham            PA                      -             636          2,501           67     
2240/50 Butler Pike                    Plymouth Meeting   PA                      -           1,104          4,627           76     
2260 Butler Pike                       Plymouth Meeting   PA                      -             661          2,727           85     
120 West Germantown Pike               Plymouth Meeting   PA                      -             685          2,773           67     
140 West Germantown Pike               Plymouth Meeting   PA                      -             481          1,976          111     
33 Street Road - Greenwood Square I    Bensalem           PA                  1,221  (d)        851          3,407          350     
33 Street Road - Greenwood Square II   Bensalem           PA                      -  (d)      1,126          4,511          916     
33 Street Road - Greenwood Square III  Bensalem           PA                      -  (d)        350          1,401          285     
3000 Cabot Boulevard                   Langhorne          PA                      -  (d)        485          1,940          270     
2260/70 Cabot Boulevard                Langhorne          PA                      -  (d)        415          1,661           81     
486 Thomas Jones Way                   Exton              PA                      -             806          3,256          517     
456 Creamery Way                       Exton              PA                      -             635          2,548            4     
110 Summit Drive                       Exton              PA                      -             403          1,647          163     
468 Creamery Way                       Exton              PA                      -             527          2,112           12     
16 Campus Boulevard                    Newtown Square     PA                      -           1,153          4,627           80     
18 Campus Boulevard                    Newtown Square     PA                      -             786          3,312           44     
500 North Gulph Road                   King of Prussia    PA                      -           1,299          5,201          438     
6575 Snowdrift Road                    Allentown          PA                      -             601          2,411            4     
7248 Tilghman Street                   Allentown          PA                      -             731          2,969           31     
7310 Tilghman Street                   Allentown          PA                  2,478             553          2,246           75     
8000 Lincoln Drive                     Marlton            NJ                      -             606          2,887          804     
457 Haddonfield Road                   Cherry Hill        NJ                  8,952           2,142          9,120          552     
168 Franklin Corner Drive              Lawrenceville      NJ                      -             398          1,597           58     
One Righter Parkway                    Talleyville        DE                      -           2,545         10,195          105     
2200 Cabot Boulevard                   Langhorne          PA                      -             770          3,117          403     
2250 Cabot Boulevard                   Langhorne          PA                      -             559          2,240            -     
1510 Gehman Road                       Lansdale           PA                      -           1,204          4,846        1,130     
300 Welsh Road                         Horsham            PA                      -           1,290          5,157          299     
655 Business Center Drive              Horsham            PA                  2,799             544          2,529          588     
501 Office Center Drive                Ft. Washington     PA                      -           1,796          7,192          707     
500 Office Center Drive                Ft. Washington     PA                      -           1,617          6,480          433     
323 Norristown Road                    Lower Gwyned       PA                      -           1,685          6,751           64     
321 Norristown Road                    Lower Gwyned       PA                      -           1,286          5,176          195     
220 Commerce Drive                     Ft. Washington     PA                      -           1,086          4,338           58     
2010 Cabot Boulevard                   Langhorne          PA                      -  (d)        760          3,091            -     
2000 Cabot Boulevard                   Langhorne          PA                      -  (d)        569          2,281           33     
2005 Cabot Boulevard                   Langhorne          PA                      -  (d)        313          1,257            -     
855 Springdale Drive                   Exton              PA                      -             838          3,370           26     
1336 Enterprise Drive                  West Goshen        PA                      -             731          2,946           27     
748 Springdale Drive                   Exton              PA                      -             231            931            8     
300 Berwyn Park                        Berwyn             PA                      -           3,415         13,422           92     
200 Berwyn Park                        Berwyn             PA                      -           2,364          9,460           18     
 Campus Boulevard - Lot 7, 8 & 9       Newtown Square     PA                    819           3,064             68            -     
1974 Sproul Road                       Broomall           PA                      -             841          3,368          168     
100 Berwyn Park                        Berwyn             PA                      -           1,823          7,290          246     
7000 Geerdes Boulevard                 King of Prussia    PA                      -           2,664         10,670            1     
1111 Old Eagle School Road             Valley Forge       PA                      -           2,005          7,721           19     
111 Presidential Boulevard             Bala Cynwyd        PA                      -           5,419         21,612          315     
100-300 Gundy Drive                    Reading            PA                  1,000           6,412         25,180          708     

</TABLE>
<PAGE>

(RESTUBBED TABLE)
<TABLE>       
<CAPTION>   
                                                                                                                             
                                                     Gross Amount at Which Carried                                 
                                                         December 31, 1998                                                   
                                       ------------------------------------------------------                                
                                                                                                                             
                                                                                                                             
                                                                                Accumulated                                  
                                                                                Depreciation at                              
                                                   Building and                 December 31,     Date of       Date     Depreciable
         Property Name                   Land      Improvements    Total (a)      1998 (b)     Construction  Acquired      Life
- - -------------------------------------  ----------  -------------- ------------  -------------  ------------  ---------  -----------
<S>                                    <C>           <C>          <C>            <C>         <C>           <C>          <C>  
Three Greentree Centre                   $ 323       $ 6,211      $ 6,535        $ 3,139        1984         1986         25 
Two Greentree Centre                       264         4,748        5,012          2,458        1983         1986         25 
One Greentree Centre                       345         4,500        4,845          2,276        1982         1986         25 
5910 -6090 Six Forks                     2,194         3,642        5,836          1,796        1982         1986         25 
700 Business Center Drive                  550         2,339        2,890            196        1986         1996         25 
800 Business Center Drive                  896         3,647        4,543            347        1986         1996         25 
One Progress Avenue                      1,404         5,744        7,147            545        1986         1996         25 
500 Enterprise Road                      1,303         5,196        6,499            887        1990         1996         25 
1155 Business Center Drive               1,029         4,096        5,125            766        1990         1996         25 
650 Dresher Road                           636         2,568        3,204            332        1984         1996         25 
2240/50 Butler Pike                      1,104         4,703        5,807            688        1984         1996         25 
2260 Butler Pike                           661         2,811        3,473            380        1984         1996         25 
120 West Germantown Pike                   685         2,840        3,525            323        1984         1996         25 
140 West Germantown Pike                   481         2,087        2,568            305        1984         1996         25 
33 Street Road - Greenwood Square I        851         3,758        4,608            410        1985         1996         25 
33 Street Road - Greenwood Square II     1,126         5,426        6,553            546        1985         1996         25 
33 Street Road - Greenwood Square III      350         1,687        2,036            189        1985         1996         25 
3000 Cabot Boulevard                       485         2,211        2,695            211        1986         1996         25 
2260/70 Cabot Boulevard                    415         1,742        2,157            171        1984         1996         25 
486 Thomas Jones Way                       806         3,773        4,579            744        1990         1996         25 
456 Creamery Way                           635         2,552        3,187            285        1987         1996         25 
110 Summit Drive                           403         1,811        2,213            230        1985         1996         25 
468 Creamery Way                           527         2,125        2,651            294        1990         1996         25 
16 Campus Boulevard                      1,153         4,707        5,860            628        1990         1996         25 
18 Campus Boulevard                        786         3,356        4,142            603        1990         1996         25 
500 North Gulph Road                     1,299         5,639        6,938            610        1979         1996         25 
6575 Snowdrift Road                        601         2,415        3,016            400        1988         1996         25 
7248 Tilghman Street                       731         3,000        3,731            369        1987         1996         25 
7310 Tilghman Street                       553         2,320        2,874            303        1985         1996         25 
8000 Lincoln Drive                         606         3,691        4,297            737        1983         1996         25 
457 Haddonfield Road                     2,142         9,671       11,814            983        1990         1996        31.5
168 Franklin Corner Drive                  398         1,656        2,053            160        1976         1996         25 
One Righter Parkway                      2,545        10,300       12,845            858        1989         1996         25 
2200 Cabot Boulevard                       770         3,519        4,290            350        1985         1996         25 
2250 Cabot Boulevard                       559         2,241        2,799            190        1985         1996         25 
1510 Gehman Road                         1,204         5,977        7,180            608        1990         1996         25 
300 Welsh Road                           1,290         5,456        6,746            245        1985         1997         25 
655 Business Center Drive                  544         3,117        3,661            327        1997         1997        31.5
501 Office Center Drive                  1,796         7,900        9,695            505        1974         1997         25 
500 Office Center Drive                  1,617         6,913        8,530            385        1974         1997         25 
323 Norristown Road                      1,685         6,815        8,500            446        1988         1997         25 
321 Norristown Road                      1,286         5,371        6,657            365        1972         1997         25 
220 Commerce Drive                       1,086         4,397        5,482            208        1985         1997         25 
2010 Cabot Boulevard                       760         3,091        3,851            210        1985         1997         25 
2000 Cabot Boulevard                       569         2,314        2,883            166        1985         1997         25 
2005 Cabot Boulevard                       313         1,258        1,570             81        1985         1997         25 
855 Springdale Drive                       838         3,395        4,234            214        1986         1997         25 
1336 Enterprise Drive                      731         2,974        3,704            216        1989         1997         25 
748 Springdale Drive                       231           938        1,170             62        1986         1997         25 
300 Berwyn Park                          3,415        13,514       16,929            770        1989         1997         25 
200 Berwyn Park                          2,364         9,478       11,842            541        1987         1997         25 
 Campus Boulevard - Lot 7, 8 & 9         3,064            68        3,132              1                     1997            
1974 Sproul Road                           841         3,537        4,377            238        1972         1997         25 
100 Berwyn Park                          1,823         7,536        9,359            459        1986         1997         25 
7000 Geerdes Boulevard                   2,664        10,671       13,335            678        1988         1997         25 
1111 Old Eagle School Road               2,005         7,741        9,745            340        1962         1997         25 
111 Presidential Boulevard               5,419        21,927       27,346            983        1974         1997         25 
100-300 Gundy Drive                      6,412        25,889       32,300          1,547        1970         1997         25 

</TABLE>
                                      F-22
<PAGE>
<TABLE>
<CAPTION>

                                                                                                                                   
                                                                                                        Initial Cost               
                                                                                          -----------------------------------------

                                                                                                                          Net
                                                                                                                     Improvements  
                                                                                                                     (Retirements) 
                                                                      Encumberances at                Building and       Since     
         Property Name                      City          State      December 31, 1998      Land      Improvements    Acquisition  
- - -------------------------------------  ----------------   -------   --------------------  ----------  -------------  --------------
<S>                                    <C>                <C>              <C>               <C>         <C>           <C>        
100 Katchel Blvd                       Reading            PA                      -           1,854          7,423           64    
10000 Midlantic Drive                  Mt. Laurel         NJ                      -           3,206         12,857          537    
2000 Midlantic Drive                   Mt. Laurel         NJ                      -           2,202          8,823           45    
1000 Howard Boulevard                  Mt. Laurel         NJ                  5,505           2,297          9,288          429    
1000 Atrium Way                        Mt. Laurel         NJ                      -           2,061          8,180          231    
1120 Executive Boulevard               Mt. Laurel         NJ                  5,665           2,074          8,415          522    
15000 Midlantic Drive                  Mt. Laurel         NJ                      -           3,061         12,254          104    
9000 Midlantic Drive                   Mt. Laurel         NJ                      -           1,472          5,895            8    
4000/5000 West Lincoln Drive           Marlton            NJ                      -             877          3,526          117    
1000/2000 West Lincoln Drive           Marlton            NJ                      -             888          3,568           66    
4000 Midlantic Drive                   Mt. Laurel         NJ                      -             714          5,085           89    
Five Eves Drive                        Marlton            NJ                      -             703          2,819          162    
9000 West Lincoln Drive                Marlton            NJ                      -             610          2,422          103    
Two Eves Drive                         Marlton            NJ                      -             818          3,461           72    
3000 West Lincoln Drive                Marlton            NJ                      -             569          2,293           65    
Four B Eves Drive                      Marlton            NJ                      -             588          2,369           44    
Four A Eves Drive                      Marlton            NJ                      -             539          2,168           20    
Main Street - Plaza 1000               Voorhees           NJ                      -           2,729         10,931          145    
Main Street- CAM                       Voorhees           NJ                      -               3             11            -    
One South Union Place                  Cherry Hill        NJ                  8,091             452          8,047          915    
1007 Laurel Oak Road                   Voorhees           NJ                      -           1,560          6,241           16    
6 East Clementon Road                  Gibbsboro          NJ                      -           1,342          5,366          113    
King & Harvard                         Cherry Hill        NJ                      -             299          1,069        1,056    
Main Street - Piazza                   Voorhees           NJ                      -             696          2,802           41    
20 East Clementon Road                 Gibbsboro          NJ                      -             763          3,055          120    
Main Street - Promenade                Voorhees           NJ                      -             531          2,052            3    
7 Foster Avenue                        Gibbsboro          NJ                      -             230            921            7    
10 Foster Avenue                       Gibbsboro          NJ                      -             243            971           38    
50 East Clementon Road                 Gibbsboro          NJ                      -             241            964            5    
5 Foster Avenue                        Gibbsboro          NJ                      -               8             32            3    
500 Scarborough Drive                  Egg Harbor         NJ                      -             744          2,977           99    
501 Scarborough Drive                  Egg Harbor         NJ                      -             744          2,977           15    
100 Commerce Drive                     Newark             DE                      -           1,160          4,633           58    
2510 Metropolitan Drive                Trevose            PA                      -           3,311         13,218          867    
201/221 King Manor Drive               King of Prussia    PA                      -             712          2,898            1    
500 Highland Drive                     Westhampton        NJ                      -           1,062          4,265            4    
300 Highland Drive                     Westhampton        NJ                      -           1,063          4,247           29    
400 Highland Drive                     Westhampton        NJ                      -             573          2,299            -    
600 Highland Drive                     Westhampton        NJ                      -             549          2,205            -    
1000 East Lincoln Drive                Marlton            NJ                      -             263          1,059           11    
2 Foster Avenue                        Gibbsboro          NJ                      -             182            730           12    
1 Foster Avenue                        Gibbsboro          NJ                      -              92            364           10    
4 Foster Avenue                        Gibbsboro          NJ                      -             181            726            7    
55 U.S. Avenue                         Gibbsboro          NJ                      -           1,109          4,435           29    
5 U.S. Avenue                          Gibbsboro          NJ                      -              20             81            3    
Keith Valley Lots 2, 4, 5              Horsham            PA                                  3,573              -            -    
755 Business Center Drive              Horsham            PA                  3,063           1,360          2,334          270    
Masons Mill                            Bryn Athyn         PA                122,598  (e)      2,476          9,982           94    
920 Harvest Drive                      Blue Bell          PA                      -           2,433          9,738         (121)   
925 Harvest Drive                      Blue Bell          PA                      -           1,671          6,606           52    
160-180 West Germantown Pike           East Norriton      PA                  5,624           1,603          6,418            -    
520 Virginia Drive                     Ft. Washington     PA                      -             845          3,455            2    
1720 Walton Road                       Blue Bell          PA                      -             380          1,489           48    
EM-Venture I - Keystone Park           Bristol            PA                      -  (e)        371          1,442           36    
EM-Venture II - Keystone Park          Bristol            PA                      -  (e)      1,712          9,142           -     
105 / 140 Terry Drive                  Newtown            PA                      -           2,299          8,238        1,133    
426 Lancaster Avenue                   Devon              PA                      -           1,689          6,756            -    
14 Campus Boulevard / Lot 13           Newtown Square     PA                  5,323           2,113          4,217          188    
610 Freedom Business Center            King of Prussia    PA                      -           2,017          8,070           47    
</TABLE>
<PAGE>
(RESTUBBED TABLE)
<TABLE>            
<CAPTION>                

                                                                                                                             
                                                     Gross Amount at Which Carried                                 
                                                         December 31, 1998                                                   
                                       ------------------------------------------------------                                
                                                                                                                             
                                                                                                                             
                                                                                Accumulated                                  
                                                                                Depreciation at                              
                                                   Building and                 December 31,     Date of       Date     Depreciable
         Property Name                   Land      Improvements    Total (a)      1998 (b)     Construction  Acquired      Life
- - -------------------------------------  ----------  -------------- ------------  -------------  ------------  ---------     -----
<S>                                     <C>           <C>          <C>            <C>             <C>         <C>        <C>
100 Katchel Blvd                           1,854         7,486        9,341            442        1970         1997         25
10000 Midlantic Drive                      3,206        13,394       16,600            910        1990         1997         25
2000 Midlantic Drive                       2,202         8,868       11,070            564        1989         1997         25
1000 Howard Boulevard                      2,297         9,718       12,014            938        1988         1997         25
1000 Atrium Way                            2,061         8,411       10,472            441        1989         1997         25
1120 Executive Boulevard                   2,074         8,937       11,011            822        1987         1997         25
15000 Midlantic Drive                      3,061        12,359       15,419            804        1991         1997         25
9000 Midlantic Drive                       1,472         5,903        7,375            375        1989         1997         25
4000/5000 West Lincoln Drive                 877         3,643        4,520            275        1982         1997         25
1000/2000 West Lincoln Drive                 888         3,635        4,522            293        1982         1997         25
4000 Midlantic Drive                         714         5,174        5,888            471        1981         1997         25
Five Eves Drive                              703         2,981        3,684            227        1986         1997         25
9000 West Lincoln Drive                      610         2,524        3,135            197        1983         1997         25
Two Eves Drive                               818         3,533        4,351            380        1987         1997         25
3000 West Lincoln Drive                      569         2,358        2,927            171        1982         1997         25
Four B Eves Drive                            588         2,413        3,001            206        1987         1997         25
Four A Eves Drive                            539         2,188        2,727            173        1987         1997         25
Main Street - Plaza 1000                   2,729        11,076       13,805            813        1988         1997         25
Main Street- CAM                               3            11           14              4                     1997         25
One South Union Place                        452         8,962        9,414            518                     1997         25
1007 Laurel Oak Road                       1,560         6,257        7,817            261        1996         1997         25
6 East Clementon Road                      1,342         5,479        6,821            243        1980         1997         25
King & Harvard                               299         2,125        2,424             56                     1997         25
Main Street - Piazza                         696         2,843        3,539            216        1990         1997         25
20 East Clementon Road                       763         3,175        3,938            177        1986         1997         25
Main Street - Promenade                      531         2,055        2,586            150        1988         1997         25
7 Foster Avenue                              230           928        1,158             39        1983         1997         25
10 Foster Avenue                             243         1,009        1,252             43        1983         1997         25
50 East Clementon Road                       241           969        1,210             44        1986         1997         25
5 Foster Avenue                                8            35           43              2        1968         1997         25
500 Scarborough Drive                        744         3,076        3,820            141        1987         1997         25
501 Scarborough Drive                        744         2,992        3,736            131        1987         1997         25
100 Commerce Drive                         1,160         4,691        5,851            241        1989         1997         25
2510 Metropolitan Drive                    3,311        14,086       17,396            755        1981         1997         25
201/221 King Manor Drive                     712         2,898        3,611            202        1964         1997         25
500 Highland Drive                         1,062         4,269        5,331            275        1990         1997         25
300 Highland Drive                         1,063         4,276        5,339            282        1990         1997         25
400 Highland Drive                           573         2,299        2,872            148        1990         1997         25
600 Highland Drive                           549         2,206        2,754            142        1990         1997         25
1000 East Lincoln Drive                      263         1,069        1,333             44        1981         1997         25
2 Foster Avenue                              182           742          924             33        1974         1997         25
1 Foster Avenue                               92           374          466             17        1972         1997         25
4 Foster Avenue                              181           733          914             31        1974         1997         25
55 U.S. Avenue                             1,109         4,464        5,573            186        1982         1997         25
5 U.S. Avenue                                 20            84          104              4        1987         1997         25
Keith Valley Lots 2, 4, 5                  3,573             -        3,573                                    1998
755 Business Center Drive                  1,360         2,604        3,964             39        1998         1998        31.5
Masons Mill                                2,476        10,075       12,552            106        1984         1998         25
920 Harvest Drive                          2,433         9,617       12,050            291        1990         1998         25
925 Harvest Drive                          1,671         6,658        8,329            139        1990         1998         25
160-180 West Germantown Pike               1,603         6,418        8,021            201        1982         1998         25
520 Virginia Drive                           845         3,457        4,302            141        1987         1998         25
1720 Walton Road                             380         1,537        1,917             16        1968         1998         25
EM-Venture I - Keystone Park                 371         1,478        1,849             15        1985         1998         25
EM-Venture II - Keystone Park              1,712         9,143       10,854             71        1985         1998         25
105 / 140 Terry Drive                      2,299         9,371       11,670            383        1982         1998         25
426 Lancaster Avenue                       1,689         6,756        8,445            267        1990         1998         25
14 Campus Boulevard / Lot 13               2,113         4,405        6,518            169        1998         1998         25
610 Freedom Business Center                2,017         8,117       10,134            324        1985         1998         25
</TABLE>

                                      F-23
<PAGE>
<TABLE>
<CAPTION>

                                                                                                                                   
                                                                                                        Initial Cost               
                                                                                          -----------------------------------------

                                                                                                                          Net
                                                                                                                     Improvements  
                                                                                                                     (Retirements) 
                                                                      Encumberances at                Building and       Since     
         Property Name                      City          State      December 31, 1998      Land      Improvements    Acquisition  
- - -------------------------------------  ----------------   -------   --------------------  ----------  -------------  --------------
<S>                                    <C>                <C>              <C>               <C>         <C>           <C>         
620 Freedom Business Center            King of Prussia    PA                      -           2,770         11,014           73    
630 Freedom Business Center            King of Prussia    PA                      -           2,773         11,144          113    
640 Freedom Business Center            King of Prussia    PA                      -           4,222         16,891           49    
751-761 Fifth Avenue                   King of Prussia    PA                      -           1,097          4,391            -    
741 First Avenue                       King of Prussia    PA                      -           1,287          5,151            -    
680 Allendale Road                     King of Prussia    PA                      -             689          2,756            -    
650 Park Avenue                        King of Prussia    PA                      -           1,104          4,378            -    
875 First Avenue                       King of Prussia    PA                      -             618          2,473            -    
630 Clark Avenue                       King of Prussia    PA                      -             547          2,190            -    
620 Allendale Road                     King of Prussia    PA                      -           1,020          3,839            -    
600 Park Avenue                        King of Prussia    PA                      -           1,012          4,048            -    
2490 Boulevard of the Generals         King of Prussia    PA                      -             348          1,394            -    
Maschellmac I                          King of Prussia    PA                      -  (e)      2,780         10,968          253    
Maschellmac II                         King of Prussia    PA                      -  (e)      2,175          8,601          197    
Maschellmac III                        King of Prussia    PA                      -  (e)      2,869         11,315          260    
Maschellmac IV                         King of Prussia    PA                      -  (e)      2,720         10,985          155    
50 Swedesford Square                   Frazer             PA                      -  (e)      3,914         15,300          354    
52 Swedesford Square                   Frazer             PA                      -  (e)      4,254         16,629          385    
922 Swedesford Road                    Frazer             PA                      -             215              1            0    
150 Corporate Center Drive             Camp Hill          PA                      -             964          3,871            -    
200 Corporate Center Drive             Camp Hill          PA                      -           1,647          6,606          243    
300 Corporate Center Drive             Camp Hill          PA                  1,086           4,823         19,301           10    
600 Corporate Circle Drive             Harrisburg         PA                      -             363          1,452            -    
800 Corporate Circle Drive             Harrisburg         PA                      -             414          1,653            -    
200 Nationwide Drive                   Harrisburg         PA                      -             100            403            -    
500 Nationwide Drive                   Harrisburg         PA                      -             208            850            -    
2401 Park Drive                        Harrisburg         PA                      -             182            728           (1)   
2404 Park Drive                        Harrisburg         PA                      -             167            668           73    
2405 Park Drive                        Harrisburg         PA                      -             424          1,697           61    
2407 Park Drive                        Harrisburg         PA                      -             464          1,864            9    
7350 Tilghman Street                   Allentown          PA                      -           3,439         13,755          736    
7450 Tilghman Street                   Allentown          PA                      -  (e)      2,875         11,664          667    
7150 Windsor Drive                     Allentown          PA                      -  (e)      1,037          4,231            -    
7535 Windsor Drive                     Allentown          PA                      -  (e)      3,384         13,439          328    
7010 Snowdrift Way                     Allentown          PA                      -  (e)        820          3,333           (1)   
Iron Run Land                          Allentown          PA                         (e)      7,419              -            -    
1105 Berkshire Boulevard               Reading            PA                      -           1,115          4,510           70    
1150 Berkshire Boulevard               Reading            PA                      -             435          1,748           71    
700 East Gate Drive                    Mt. Laurel         NJ                      -  (e)      3,575         14,478          (49)   
701 East Gate Drive                    Mt. Laurel         NJ                      -  (e)      1,741          6,897          159    
815 East Gate Drive                    Mt. Laurel         NJ                      -  (e)        638          2,592            1    
817 East Gate Drive                    Mt. Laurel         NJ                      -  (e)        613          2,434           57    
East Gate Land                         Mt. Laurel         NJ                         (e)      2,666              -            -    
304 Harper Drive                       Mt. Laurel         NJ                      -  (e)        659          2,682           (1)   
305 Harper Drive                       Mt. Laurel         NJ                      -  (e)        223            916            -    
308 Harper Drive                       Mt. Laurel         NJ                      -  (e)      1,648          6,682            2   
303 Fellowship Drive                   Mt. Laurel         NJ                      -  (e)      1,498          6,072            9   
305 Fellowship Drive                   Mt. Laurel         NJ                      -  (e)      1,426          5,785           (1)  
307 Fellowship Drive                   Mt. Laurel         NJ                      -  (e)      1,569          6,360           29   
309 Fellowship Drive                   Mt. Laurel         NJ                      -  (e)      1,522          6,172            -   
50 East State Street                   Trenton            NJ                      -           8,926         35,735           51   
33 West State Street                   Trenton            NJ                      -           6,016         24,091           36   
993 Lenox Drive                        Lawrenceville      NJ                      -           2,811         17,996           (1)  
997 Lenox Drive                        Lawrenceville      NJ                                  2,410          9,700            1   
1009 Lenox Drive                       Lawrenceville      NJ                 15,342           5,190         19,284          655   
104 Windsor Center Drive               East Windsor       NJ                      -             977          3,918          967   
102 Chestnut Ridge Road                Montvale           NJ                      -           1,609          6,437            -   
25 Phillips Parkway                    Montvale           NJ                      -           1,950          7,799            -   
3 Paragon Drive                        Montvale           NJ                      -           2,021          8,757          325   

</TABLE>
<PAGE>
(RESTUBBED TABLE)
<TABLE>       
<CAPTION>        
                                                                                                                             
                                                     Gross Amount at Which Carried                                 
                                                         December 31, 1998                                                   
                                       ------------------------------------------------------                                
                                                                                                                             
                                                                                                                             
                                                                                Accumulated                                  
                                                                                Depreciation at                              
                                                   Building and                 December 31,     Date of       Date     Depreciable
         Property Name                   Land      Improvements    Total (a)      1998 (b)     Construction  Acquired      Life
- - -------------------------------------  ----------  -------------- ------------  -------------  ------------  ---------  -----------
<S>                                    <C>         <C>            <C>           <C>            <C>           <C>        <C>
620 Freedom Business Center               2,770        11,086       13,857            444        1986         1998         25  
630 Freedom Business Center               2,773        11,257       14,030            453        1989         1998         25  
640 Freedom Business Center               4,222        16,940       21,162            670        1991         1998         25  
751-761 Fifth Avenue                      1,097         4,391        5,488             68        1967         1998         25  
741 First Avenue                          1,287         5,151        6,438            178        1966         1998         25  
680 Allendale Road                          689         2,756        3,445             95        1962         1998         25  
650 Park Avenue                           1,104         4,378        5,482            151        1968         1998         25  
875 First Avenue                            618         2,473        3,091             85        1966         1998         25  
630 Clark Avenue                            547         2,190        2,737             76        1960         1998         25  
620 Allendale Road                        1,020         3,839        4,859            133        1961         1998         25  
600 Park Avenue                           1,012         4,048        5,060            140        1964         1998         25  
2490 Boulevard of the Generals              348         1,394        1,742             55        1975         1998         25  
Maschellmac I                             2,780        11,221       14,001            115        1980         1998         25  
Maschellmac II                            2,175         8,798       10,973             90        1984         1998         25  
Maschellmac III                           2,869        11,575       14,444            118        1985         1998         25  
Maschellmac IV                            2,720        11,141       13,860            119        1987         1998         25  
50 Swedesford Square                      3,914        15,654       19,568            161        1988         1998         25  
52 Swedesford Square                      4,254        17,014       21,268            175        1986         1998         25  
922 Swedesford Road                         215             1          216              -        1986         1998         25  
150 Corporate Center Drive                  964         3,871        4,835            103        1987         1998         25  
200 Corporate Center Drive                1,647         6,850        8,496            224        1989         1998         25  
300 Corporate Center Drive                4,823        19,311       24,134            504        1989         1998         25  
600 Corporate Circle Drive                  363         1,452        1,815             38        1978         1998         25  
800 Corporate Circle Drive                  414         1,653        2,067             39        1979         1998         25  
200 Nationwide Drive                        100           403          503             10        1978         1998         25  
500 Nationwide Drive                        208           850        1,058             22        1977         1998         25  
2401 Park Drive                             182           728          909             19        1984         1998         25  
2404 Park Drive                             167           741          908             27        1983         1998         25  
2405 Park Drive                             424         1,757        2,182             58        1985         1998         25  
2407 Park Drive                             464         1,873        2,337             49        1985         1998         25  
7350 Tilghman Street                      3,439        14,490       17,930            162        1987         1998         25  
7450 Tilghman Street                      2,875        12,332       15,206            136        1986         1998         25  
7150 Windsor Drive                        1,037         4,231        5,268             42        1988         1998         25  
7535 Windsor Drive                        3,384        13,767       17,151            142        1988         1998         25  
7010 Snowdrift Way                          820         3,333        4,152             33        1991         1998         25  
Iron Run Land                             7,419             -        7,419                                    1998             
1105 Berkshire Boulevard                  1,115         4,580        5,695            181        1987         1998         25  
1150 Berkshire Boulevard                    435         1,820        2,254             90        1979         1998         25  
700 East Gate Drive                       3,575        14,429       18,004            147        1984         1998         25  
701 East Gate Drive                       1,741         7,057        8,797             72        1986         1998         25  
815 East Gate Drive                         638         2,592        3,231             26        1986         1998         25  
817 East Gate Drive                         613         2,491        3,104             25        1986         1998         25  
East Gate Land                            2,666             -        2,666                                    1998             
304 Harper Drive                            659         2,682        3,340             28        1975         1998         25  
305 Harper Drive                            223           916        1,139              9        1979         1998         25  
308 Harper Drive                          1,648         6,682        8,332             68        1976         1998         25  
303 Fellowship Drive                      1,498         6,080        7,579             62        1979         1998         25  
305 Fellowship Drive                      1,426         5,785        7,210             59        1980         1998         25  
307 Fellowship Drive                      1,569         6,388        7,958             66        1981         1998         25  
309 Fellowship Drive                      1,522         6,172        7,694             63        1982         1998         25  
50 East State Street                      8,926        35,786       44,712          1,086        1989         1998         25  
33 West State Street                      6,016        24,126       30,143            727        1988         1998         25  
993 Lenox Drive                           2,811        17,996       20,806            334        1985         1998         25  
997 Lenox Drive                           2,410         9,700       12,111            297        1987         1998         25  
1009 Lenox Drive                          5,190        19,939       25,129            603        1989         1998         25  
104 Windsor Center Drive                    977         4,885        5,862            164        1987         1998         25  
102 Chestnut Ridge Road                   1,609         6,437        8,046             70        1979         1998         25  
25 Phillips Parkway                       1,950         7,799        9,749             85        1988         1998         25  
3 Paragon Drive                           2,021         9,082       11,103              7        1988         1998         25  
</TABLE>
                                      F-24
<PAGE>
<TABLE>
<CAPTION>

                                                                                                                                   
                                                                                                        Initial Cost               
                                                                                          -----------------------------------------

                                                                                                                          Net
                                                                                                                     Improvements  
                                                                                                                     (Retirements) 
                                                                      Encumberances at                Building and       Since     
         Property Name                      City          State      December 31, 1998      Land      Improvements    Acquisition  
- - -------------------------------------  ----------------   -------   --------------------  ----------  -------------  --------------
<S>                                    <C>                <C>              <C>               <C>         <C>           <C>       
1255 Broad Street                      Bloomfield         NJ                      -             987          3,947             -   
Park 80 West Plaza I                   Saddlebrook        NJ                      -           6,242         26,938         2,472   
Park 80 West Plaza II                  Saddlebrook        NJ                      -           7,668         30,533           995   
201 North Walnut Street                Wilmington         DE                      -          10,359         41,509           135   
301 North Walnut Street                Wilmington         DE                      -           8,495         34,016            91   
256-263 Chapman Road / Cambridge       Newark             DE                      -             292          1,185             -   
256-263 Chapman Road / Bellevue        Newark             DE                      -             374          1,547             -   
256-263 Chapman Road / Commonwealth    Newark             DE                      -             351          1,421            15   
256-263 Chapman Road / Oxford          Newark             DE                      -             410          1,663           118   
256-263 Chapman Road / Chopin          Newark             DE                      -             484          1,958            18   
256-263 Chapman Road / Stockton        Newark             DE                      -             291          1,176             -   
256-263 Chapman Road / CAM             Newark             DE                      -                              -             -   
4550 New Linden Hill Road              Wilmington         DE                      -           1,998          7,995           223   
Arboretum I                            Richmond           VA                 25,800  (f)      1,366          5,505             2   
Arboretum II                           Richmond           VA                      -  (f)        987          3,985             1   
Arboretum III                          Richmond           VA                      -  (f)      5,465         22,016            29   
Arboretum V                            Richmond           VA                      -  (f)      1,113          4,487             1   
Arboretum VI                           Richmond           VA                 86,869  (g)      1,862          7,724           156   
Arboretum VII                          Richmond           VA                      -  (g)        583          2,440            (1)  
Dabney A-2                             Richmond           VA                      -  (g)        552          2,209             -   
Greater Dabney                         Richmond           VA                         (g)      3,497              -             -   
600 East Main Street                   Richmond           VA                      -  (e)      9,842         38,470         1,074   
4805 Lake Brooke Drive                 Glen Allen         VA                      -  (g)      1,645          6,586             -   
2812 Emerywood Parkway                 Henrico            VA                      -  (g)      1,072          4,294             -   
2100-2108 West Laburnum                Richmond           VA                  7,442           2,486          8,862            (1)  
1970 Chainbridge Road                  Vienna             VA                      -  (g)      7,364         29,455             -   
1880 Campus Commons Drive              Reston             VA                      -  (g)      5,724         22,895             -   
Greenwood Center                       Fairfax            VA                      -  (g)      5,414         21,687             -   
Oakwood Center                         Fairfax            VA                      -  (g)      3,626         14,511             1   
245 Old Country Road                   Mellville          NY                      -           1,226          4,903             -   
Westpark South Alston Avenue           Durham             NC                      -  (e)      1,643          6,438           149   
Westpark Land                          Durham             NC                                  2,031              -                 
1760 Market Street                     Philadelphia       PA                      -  (e)      3,029         12,246             1   
Bowman Plains Industrial Park          Frederick          MD                      -           3,356         13,220             1   
100 West Road                          Towson             MD                      -           3,432         13,760           106   
180 Wheeler Court                      Langhorne          PA                      -             608          2,436             -   
640-660 Allendale Road                 King of Prussia    PA                      -           3,671          3,343             -   
780 Third Avenue                       King of Prussia    PA                      -             568          2,273             -   
820 Third Avenue                       King of Prussia    PA                      -             487          1,948             -   
650 Clark Avenue                       King of Prussia    PA                      -             448          1,800             -   
741 Third Avenue                       King of Prussia    PA                      -             436          1,746            25   
7055 Ambassador Drive                  Allentown          PA                      -  (e)      1,340          5,489           122   
6755 Snowdrift Way                     Allentown          PA                      -  (e)      1,125          4,604           102   
6845 Snowdrift Way                     Allentown          PA                      -  (e)        884          3,690             -   
6690 Grant Way                         Allentown          PA                      -  (e)        808          3,303            74   
6670 Grant Way                         Allentown          PA                      -  (e)        638          2,614            58   
6810 Tilghman Street                   Allentown          PA                      -  (e)        453          1,902             -   
7020 Snowdrift Way                     Allentown          PA                      -  (e)        319          1,344             -   
1200 Highland Drive                    Westhampton        NJ                      -              68          5,440             -   
44 National Road                       Edison             NJ                      -             322          1,288             -   
835 New Durham Road                    Edison             NJ                      -             701          2,553             -   
837 New Durham Road                    Edison             NJ                      -             296          1,184             -   
111 Ames Court                         Plainview          NY                      -             176            671             -   
55 Ames Court                          Plainview          NY                      -             814          3,259             -   
10 Skyline Drive                       Plainview          NY                      -             238            951             -   
11 Commercial Street                   Plainview          NY                      -             236            942             -   
80 Skyline Drive                       Plainview          NY                      -             482          1,937             -   
120 Express Street                     Plainview          NY                      -             402          1,591             -   
336 South Service Road                 Melville           NY                      -             703          2,812             -   
</TABLE>

<PAGE>
(RESTUBBED TABLE0
<TABLE>                 
<CAPTION>                  
                                                                                                                             
                                                     Gross Amount at Which Carried                                 
                                                         December 31, 1998                                                   
                                       ------------------------------------------------------                                
                                                                                                                             
                                                                                                                             
                                                                                Accumulated                                  
                                                                                Depreciation at                              
                                                   Building and                 December 31,     Date of       Date     Depreciable
         Property Name                   Land      Improvements    Total (a)      1998 (b)     Construction  Acquired      Life
- - -------------------------------------  ----------  -------------- ------------  -------------  ------------  ---------  -----------
<S>                                    <C>           <C>           <C>          <C>             <C>          <C>         <C>
1255 Broad Street                           987         3,947        4,934             43        1981         1998         25      
Park 80 West Plaza I                      6,242        29,410       35,652          1,347        1988         1998         25      
Park 80 West Plaza II                     7,668        31,528       39,196          1,298        1970         1998         25      
201 North Walnut Street                  10,359        41,645       52,003          1,403        1988         1998         25      
301 North Walnut Street                   8,495        34,106       42,602            873        1989         1998         25      
256-263 Chapman Road / Cambridge            292         1,185        1,477             47        1983         1998         25      
256-263 Chapman Road / Bellevue             374         1,547        1,921             69        1983         1998         25      
256-263 Chapman Road / Commonwealth         351         1,436        1,787             61        1983         1998         25      
256-263 Chapman Road / Oxford               410         1,782        2,191             74        1983         1998         25      
256-263 Chapman Road / Chopin               484         1,977        2,460             79        1983         1998         25      
256-263 Chapman Road / Stockton             291         1,176        1,467             47        1983         1998         25      
256-263 Chapman Road / CAM                    -             -            -                       1983         1998         25      
4550 New Linden Hill Road                 1,998         8,218       10,216            330        1974         1998         25      
Arboretum I                               1,366         5,507        6,873             57        1988         1998         25      
Arboretum II                                987         3,985        4,973             40        1988         1998         25      
Arboretum III                             5,465        22,045       27,510            225        1988         1998         25      
Arboretum V                               1,113         4,487        5,601             46        1988         1998         25      
Arboretum VI                              1,862         7,880        9,742             90        1991         1998         25      
Arboretum VII                               583         2,440        3,022             24        1991         1998         25      
Dabney A-2                                  552         2,209        2,761             23        1993         1998         25      
Greater Dabney                            3,497             -        3,497                                    1998         25      
600 East Main Street                      9,842        39,544       49,386            411        1986         1998         25      
4805 Lake Brooke Drive                    1,645         6,586        8,231             68        1996         1998         25      
2812 Emerywood Parkway                    1,072         4,294        5,366             43        1980         1998         25      
2100-2108 West Laburnum                   2,486         8,862       11,347             63        1976         1998         25      
1970 Chainbridge Road                     7,364        29,455       36,819            303        1982         1998         25      
1880 Campus Commons Drive                 5,724        22,895       28,619            236        1985         1998         25      
Greenwood Center                          5,414        21,687       27,101            223        1985         1998         25      
Oakwood Center                            3,626        14,511       18,138            150        1985         1998         25      
245 Old Country Road                      1,226         4,903        6,129             53        1978         1998         25      
Westpark South Alston Avenue              1,643         6,587        8,230             68        1985         1998         25      
Westpark Land                             2,031             -        2,031                                    1998                 
1760 Market Street                        3,029        12,247       15,276            125        1981         1998         25      
Bowman Plains Industrial Park             3,356        13,220       16,577             29        1998         1998         25      
100 West Road                             3,432        13,866       17,298            563        1988         1998         25      
180 Wheeler Court                           608         2,436        3,044             84        1975         1998         25      
640-660 Allendale Road                    3,671         3,343        7,014            115        1962         1998         25      
780 Third Avenue                            568         2,273        2,841             78        1967         1998         25      
820 Third Avenue                            487         1,948        2,435             67        1970         1998         25      
650 Clark Avenue                            448         1,800        2,248             62        1965         1998         25      
741 Third Avenue                            436         1,771        2,207             63        1962         1998         25      
7055 Ambassador Drive                     1,340         5,611        6,951             55        1991         1998         25      
6755 Snowdrift Way                        1,125         4,706        5,831             46        1988         1998         25      
6845 Snowdrift Way                          884         3,690        4,574             36        1975         1998         25      
6690 Grant Way                              808         3,377        4,185             33        1982         1998         25      
6670 Grant Way                              638         2,671        3,310             27        1979         1998         25      
6810 Tilghman Street                        453         1,902        2,355             19        1975         1998         25      
7020 Snowdrift Way                          319         1,344        1,663             13        1975         1998         25      
1200 Highland Drive                          68         5,440        5,508             36        1998         1998         25      
44 National Road                            322         1,288        1,610             14        1967         1998         25      
835 New Durham Road                         701         2,553        3,254             30        1974         1998         25      
837 New Durham Road                         296         1,184        1,480             13        1977         1998         25      
111 Ames Court                              176           671          847              7        1959         1998         25      
55 Ames Court                               814         3,259        4,073             35        1961         1998         25      
10 Skyline Drive                            238           951        1,189             10        1960         1998         25      
11 Commercial Street                        236           942        1,178             10        1961         1998         25      
80 Skyline Drive                            482         1,937        2,419             23        1961         1998         25      
120 Express Street                          402         1,591        1,993             17        1962         1998         25      
336 South Service Road                      703         2,812        3,515             31        1965         1998         25      
</TABLE> 
                                      F-25
<PAGE>
<TABLE>
<CAPTION>

                                                                                                                                   
                                                                                                        Initial Cost               
                                                                                          -----------------------------------------

                                                                                                                          Net
                                                                                                                     Improvements  
                                                                                                                     (Retirements) 
                                                                      Encumberances at                Building and       Since     
         Property Name                      City          State      December 31, 1998      Land      Improvements    Acquisition  
- - -------------------------------------  ----------------   -------   --------------------  ----------  -------------  --------------
<S>                                    <C>                <C>              <C>               <C>         <C>           <C>       
180 Central Ave / 2 Engineers Lane     Farmingdale        NY                      -             220            882             -   
8 Engineers Lane                       Farmingdale        NY                      -             193            774             -   
19 Engineers Lane                      Farmingdale        NY                      -             114            452             -   
91 North Industry Court                Deer Park          NY                      -             547          2,191             -   
100 Voice Road                         Carle Place        NY                      -             398          1,594             -   
110 Voice Road                         Carle Place        NY                      -             255          1,018             -   
1000 Axinn Avenue                      Garden City        NY                      -             543          2,171             -   
645 Stewart Avenue                     Garden City        NY                      -             412          1,648             -   
Dabney I                               Richmond           VA                      -  (g)        357          1,431             -   
Dabney II                              Richmond           VA                      -  (g)        388          1,557             1   
Dabney III                             Richmond           VA                      -  (g)        281          1,128            26   
Dabney IV                              Richmond           VA                      -  (g)        424          1,700             -   
Dabney V                               Richmond           VA                      -  (g)        504          2,020             -   
Dabney VI                              Richmond           VA                      -  (g)        509          2,040             -   
Dabney VII                             Richmond           VA                      -  (g)        456          1,827            (1)  
Dabney VIII                            Richmond           VA                      -  (g)        354          1,420             -   
Dabney IX                              Richmond           VA                      -  (g)        513          2,055             -   
Dabney X                               Richmond           VA                      -  (g)      1,018          4,079             -   
Danbney XI                             Richmond           VA                      -  (g)        531          2,129             -   
2511 Brittons Hill Road                Richmond           VA                      -  (g)      1,205          4,834             -   
1957 Westmoreland Street               Richmond           VA                      -  (g)      1,065          4,253           112   
2201 Dabney Street                     Richmond           VA                      -  (g)        368          1,475             -   
2110 Tomlynn Street                    Richmond           VA                      -  (g)        159            638            (1)  
Dabney A-1                             Richmond           VA                      -  (g)        265          1,062            (1)  
Philadelphia Marine Center             Philadelphia       PA                      -  (e)        533          2,202             -   
                                                                                                                                 
                                                                                                                                 
Grand Total - All Properties                                              $ 319,235       $ 390,993    $ 1,484,971      $ 32,131   
                                                                          =========       =========    ===========      ========

</TABLE>
<PAGE>
(RESTUBBED TABLE)
<TABLE>                          
<CAPTION>                                                                                                                          
                                                     Gross Amount at Which Carried                                                 
                                                         December 31, 1998                                                         
                                       ------------------------------------------------------                                      
                                                                                                                                   
                                                                                Accumulated                                        
                                                                                Depreciation at                                    
                                                   Building and                 December 31,     Date of       Date     Depreciable
         Property Name                   Land      Improvements    Total (a)      1998 (b)     Construction  Acquired      Life    
- - -------------------------------------  ----------  -------------- ------------  -------------  ------------  ---------  -----------
<S>                                     <C>        <C>             <C>             <C>          <C>          <C>          <C>
180 Central Ave / 2 Engineers Lane          220           882        1,102             10        1960         1998         25      
8 Engineers Lane                            193           774          967              8        1963         1998         25      
19 Engineers Lane                           114           452          566              5        1962         1998         25      
91 North Industry Court                     547         2,191        2,738             24        1965         1998         25      
100 Voice Road                              398         1,594        1,992             17        1963         1998         25      
110 Voice Road                              255         1,018        1,273             11        1963         1998         25      
1000 Axinn Avenue                           543         2,171        2,714             24        1965         1998         25      
645 Stewart Avenue                          412         1,648        2,060             18        1962         1998         25      
Dabney I                                    357         1,431        1,788             15        1982         1998         25      
Dabney II                                   388         1,557        1,946             16        1983         1998         25      
Dabney III                                  281         1,154        1,435             12        1986         1998         25      
Dabney IV                                   424         1,700        2,124             18        1985         1998         25      
Dabney V                                    504         2,020        2,524             21        1985         1998         25      
Dabney VI                                   509         2,040        2,549             21        1986         1998         25      
Dabney VII                                  456         1,827        2,282             19        1987         1998         25      
Dabney VIII                                 354         1,420        1,774             15        1988         1998         25      
Dabney IX                                   513         2,055        2,568             21        1989         1998         25      
Dabney X                                  1,018         4,079        5,097             42        1989         1998         25      
Danbney XI                                  531         2,129        2,660             22        1994         1998         25      
2511 Brittons Hill Road                   1,205         4,834        6,039             49        1987         1998         25      
1957 Westmoreland Street                  1,065         4,365        5,430             43        1975         1998         25      
2201 Dabney Street                          368         1,475        1,843             15        1962         1998         25      
2110 Tomlynn Street                         159           638          796              7        1965         1998         25      
Dabney A-1                                  265         1,062        1,326             11        1984         1998         25      
Philadelphia Marine Center                  533         2,202        2,735             22                     1998         25      
                                                                                                                                   
                                                                                                                                   
Grand Total - All Properties          $ 390,993   $ 1,517,111   $1,908,095       $ 67,477                               
                                      =========   ===========   ==========       ========
</TABLE>
(a)  Reconciliation of Real Estate:
     The following table reconciles the real estate investments from
     January 1, 1998 to December 31, 1998(in thousands):
     Balance at beginning of year                                   $ 586,414
     Additions during year:
          Acquisitions                                              1,295,615
          Capital expenditures                                         26,301
     Deletions during year:
          Retirements                                                    (235)
                                                                  ===========
     Balance at end of year                                       $ 1,908,095
                                                                  ===========

(b)  Reconciliation of Accumulated Depreciation:
     The following table reconciles the accumulated depreciation on real
     estate investments from January 1, 1998 to December 31, 1998 (in
     thousands)
     Balance at beginning of year                                 $    22,857
     Additions during year:
          Depreciation expense                                         45,040
     Deletions during year:
          Retirements                                                    (420)
                                                                  ===========
     Balance at end of year                                       $    67,477
                                                                  ===========

(c)  At December 31, 1998, the two mortgage loans total $7.0 million and $2.6
     million receptively. The loans are cross-collateralized and are secured by
     first mortgages on each property.

(d)  Unsecured debt in connection with the Company's acquisition of a property
     portfolio containing eight properties.

(e)  The loan is cross-collateralized and is secured by mortgages on 36
     properties.

(f)  The loan is cross-collateralized and is secured by mortgages on 4
     properties.

(g)  The loan is cross-collateralized and is secured by mortgages on 26
     properties.

                                      F-26

<PAGE>

                                                                 EXHIBIT 3.1.5



                             BRANDYWINE REALTY TRUST

                              ARTICLES OF AMENDMENT

THIS IS TO CERTIFY THAT:

                  FIRST: Section 6.1 of the Declaration of Trust of Brandywine
Realty Trust, a Maryland real estate investment trust (the "Trust"), is hereby
amended by increasing from 105,000,000 to 110,000,000 the total number of shares
of beneficial interest which the Trust is authorized to issue and from 5,000,000
to 10,000,000 the number of Preferred Shares which the Trust is authorized to
issue.

                  SECOND: Pursuant to Section 8-203(a)(7) of the Corporations
and Associations Article of the Annotated Code of Maryland, the amendment to the
Declaration of Trust of the Trust as hereinabove set forth has been duly
approved by the Board of Trustees of the Trust.

                  THIRD: The total number of shares of beneficial interest which
the Trust had authority to issue immediately prior to this amendment was
105,000,000 shares of beneficial interest, consisting of 100,000,000 common
shares of beneficial interest, $.0l par value per share, and 5,000,000 preferred
shares of beneficial interest, $.0l par value per share. The aggregate par value
of all shares of beneficial interest having par value was $1,050,000.

                  The total number of shares of beneficial interest which the
Trust has authority to issue pursuant to the amendment described herein is
110,000,000 shares of beneficial interest, consisting of 100,000,000 common
shares of beneficial interest, $.0l par value per share, and 10,000,000
preferred shares of beneficial interest, $.0l par value per share. The aggregate
par value of all shares of beneficial interest having par value is $1,100,000.

                  FOURTH: The undersigned President acknowledges these Articles
of Amendment to be the trust act of the Trust and, as to all matters or facts
required to be verified under oath, the undersigned President acknowledges that
to the best of his knowledge, information and belief, these matters and facts
are true in all material respects and that this statement is made under the
penalties for perjury.


                  IN WITNESS WHEREOF, the Trust has caused these Articles of
Amendment to be signed in its name and on its behalf by its President and
attested to by its Secretary on this 19th day of March, 1999.


ATTEST:                                      BRANDYWINE REALTY TRUST


/s/  Brad A. Molotsky                        By: /s/  Gerard H. Sweeney (SEAL)
- - ----------------------                          ------------------------------
Brad A. Molotsky                                 Gerard H. Sweeney
Secretary                                        President and
                                                 Chief Executive Officer

<PAGE>

                                                                 EXHIBIT 10.36

                    AMENDED AND RESTATED EMPLOYMENT AGREEMENT


                  This Amended and Restated Employment Agreement (the
"Agreement") is made as of December 17, 1998 and amends and restates in its
entirety the Employment Agreement made and entered into as of January 2, 1998,
as amended and restated as of February 11, 1998, by and between Anthony A.
Nichols, Sr. ("Employee") and Brandywine Realty Trust, a Maryland real estate
investment trust (the "Company").

                                   BACKGROUND

                  The Company desires to employ Employee, and Employee desires
to enter into the employ of the Company, on the terms and conditions contained
in this Agreement.

                  NOW, THEREFORE, in consideration of the mutual agreements
contained herein, and intending to be legally bound hereby, the parties hereto
agree as follows:

                  1. Employment. The Company hereby employs Employee, and
Employee hereby accepts employment by the Company, for the period and upon the
terms and conditions contained in this Agreement.

                  2.       Office and Duties.

                           (a) Employee shall be employed by the Company as its
Chairman of the Board and will serve as a member of the Board of Trustees of the
Company (the "Board") and as Chairman of the Executive Committee of the Board,
and shall perform such duties and shall have such authority as may from time to
time be specified by the Board. Employee shall report directly to the Board.

                           (b) Without further consideration, Employee shall, as
directed by the Board, serve as a director or officer of, or perform such other
duties and services as may be requested for and with respect to, any of the
Company's Subsidiaries, including, without limitation, Brandywine Realty
Services Corporation. As used in this Agreement, the terms "Subsidiary" and
"Subsidiaries" shall mean, with respect to any entity, any corporation,
partnership, limited liability company or other business entity in which the
subject entity has the power (whether by contract, through securities ownership,
or otherwise and whether directly or indirectly through control of one or more
intermediate Subsidiaries) to elect a majority of board of directors or other
governing body, including, in the case of a partnership, a majority of the board
of directors or other governing body of the general partner.

                           (c) Employee shall devote his full working time,
energy, skill and best efforts to the performance of his duties hereunder, in a
manner which will faithfully and diligently further the business interests of
the Company and its Subsidiaries.



                                                      -1-



<PAGE>



                  3. Term. Unless sooner terminated as hereinafter provided, the
term of Employee's employment shall extend through December 31, 2003 (the
"Term"). The Term shall automatically renew for additional one-year periods at
the expiration of the then current Term unless either party shall give notice of
his or its election to terminate Employee's employment at least one year prior
to the end of the then-current Term, unless earlier terminated as hereinafter
provided.

                  4. Base Salary. For all of the services rendered by Employee
to the Company and its Subsidiaries, Employee shall receive an aggregate base
salary of $250,000 per annum during the term of his employment hereunder. Such
salary may be paid, at the election of the Company, either by the Company or by
one or more of its Subsidiaries, in such relative proportions as the Company may
determine, as earned in periodic installments in accordance with the Company's
normal payment policies for executive officers. In the event that the Employee
is also employed during any period by a Subsidiary of the Company, the amount of
the base salary payable by the Company during such period shall be reduced by
the amount of salary received by Employee during such period from such
Subsidiary. Employee's base salary shall be subject to review by the Board not
less frequently than annually, and Employee shall receive such salary increases
as the Board may from time to time approve.

                  5. Bonus. Employee shall receive, during the term of his
employment hereunder, such annual bonus as the Board, in its sole discretion,
may determine from time to time. Any such bonus may be based on Employee's
annual performance goals as established by the Board from time to time.

                  6. Participation in Incentive Plans. In addition to Employee's
eligibility to receive annual bonuses pursuant to Section 5, Employee shall be
entitled to participate in short-term and long-term incentive plans as shall be
maintained by the Company from time to time on such terms and conditions as
shall be established by the Board.

                  7. Prior Warrants. Nothing in this Agreement shall affect the
terms and conditions of warrants granted by the Company to Employee before the
date of this Agreement. Such warrants shall continue in force as in effect
immediately before the date of this Agreement.


                  8. Fringe Benefits. Throughout the term of his employment and
as long as they are kept in force by the Company, Employee shall be entitled to
participate in and receive the benefits of any profit sharing plan, retirement
plan, health or other employee benefit plan made available to other executive
officers of the Company, but in no event shall such benefits be less favorable
to Employee than the benefits listed on Schedule A hereto.

                  9. Automobile Allowance. Employee shall receive, during the
term of his employment hereunder, an automobile allowance of $833 per month.



                                                      -2-



<PAGE>



                  10. Expenses. The Company shall reimburse Employee for all
reasonable, ordinary and necessary business expenses incurred by Employee in
connection with the performance of Employee's duties hereunder upon receipt of
vouchers therefor and in accordance with the Company's regular reimbursement
procedures and practices in effect from time to time.

                  11. Vacation. Employee shall be entitled to a vacation of four
(4) weeks during each twelve (12) month period of his employment hereunder,
during which time Employee's compensation hereunder shall be paid in full.
Employee shall be permitted to carry over unused vacation during each twelve
(12) month period during the term and use such unused vacation in any subsequent
twelve (12) month period during the term.

                  12. Disability. If the Board determines in good faith by a
vote of a majority of its members (other than Employee) that Employee is unable
to perform his duties hereunder due to partial or total disability or incapacity
resulting from a mental or physical illness or injury or any similar cause for a
period of one hundred and twenty (120) consecutive days or for a cumulative
period of one hundred and eighty (180) days during any twelve (12) month period,
the Company shall have the right to terminate Employee's employment at any time
thereafter.

                  13. Death. Employee's employment shall terminate at the time
of his death.

                  14. Termination of Employment for Cause. The Company may
discharge Employee at any time for Cause. Cause shall mean: (i) habitual
intoxication; (ii) drug addiction; (iii) intentional and willful violation of
any express direction of the Board; (iv) theft, misappropriation or embezzlement
of the Company's funds; (v) conviction of a felony; or (vi) repeated and
consistent failure of Employee to be present at work during regular hours
without valid reason therefor.

                  15. Termination of Employment Without Cause. The Board, in its
sole discretion, may terminate Employee's employment hereunder without Cause
upon 30 days' prior written notice to Employee at any time.

                  16. Resignation For Good Reason. Employee's resignation shall
be treated as a "Resignation for Good Reason" if Employee resigns within six (6)
months after any of the following circumstances, unless in the case of the
circumstances set forth in paragraphs (b), (c) or (d) below, such circumstances
are fully corrected within 30 days of Employee's delivery of notice to the
Company:

                           (a) A reduction in Employee's annual rate of base
salary;

                           (b) A failure of the Company to make the payments
required by Section 4 hereof;



                                       -3-



<PAGE>



                           (c) A significant adverse alteration in the nature or
status of Employee's responsibilities;

                           (d) Any other material breach by the Company of this
Agreement;

                           (e) Relocation (without the written consent of
Employee) of the Company's executive offices to a location more than 30 miles
from its current location; or

                           (f) Upon a Change of Control (as defined in Section
17).

                  17. Change of Control. For purpose of this Agreement, a
"Change of Control" means:

                           (a) A "Change of Control" within the meaning of
Section 1(d) of the Brandywine Realty Trust 1997 Long-Term Incentive Plan, as
currently in effect; or

                           (b) The purchase of any common shares of beneficial
interest of the Company pursuant to a tender or exchange offer other than an
offer by the Company.

                  18. Payments Upon or After Termination of Employment.

                           (a) Voluntary Resignation Other than for Good Reason;
Termination for Cause; Non-Renewal of Employment Agreement. If Employee's
employment hereunder is terminated before the expiration of the Term because of
Employee's voluntary resignation (other than a Resignation for Good Reason) or
because of the Company's termination of Employee's employment for Cause, or if
Employee's employment is terminated at the expiration of the Term following an
election by either the Company or Employee not to renew the Term pursuant to
Section 3, the Company, or at its direction, its Subsidiaries shall pay to
Employee or, as appropriate, his legal representatives, heirs or estate all
amounts payable under Sections 4 and 8 accrued through the applicable date of
termination (the "Accrued Amount") within 30 days after such date of
termination. If Employee's employment is terminated by the Company for Cause or
by the Employee voluntarily (unless such termination of employment is a
Resignation for Good Reason), or if Employee's employment is terminated at the
expiration of the Term following an election by either the Company or Employee
not to renew the Term pursuant to Section 3, the Company shall have no
obligation or liability hereunder after the date of discharge or termination to
pay or provide base salary, bonus compensation, fringe benefits, or any other
form of compensation hereunder other than to pay the Accrued Amount.

                           (b) Termination of Employment Because of Death. If
Employee's employment is terminated as a result of the Employee's death before
the expiration of the Term, the Company shall pay Employee's legal
representatives the Accrued Amount as of the date of Employee's death, and, in
addition, the product of three (3) times the greater of (1) the sum of the
amounts paid or payable to Employee pursuant to Sections 4 and 5 hereunder (and
the short-term


                                       -4-



<PAGE>



portion of any bonus amounts paid or payable pursuant to Section 6 hereunder)
for the calendar year preceding the calendar year in which the death occurs or
(2) the sum of the amounts paid or payable to Employee pursuant to Sections 4
and 5 hereunder (and the short-term portion of any bonus amounts paid or payable
pursuant to Section 6 hereunder) during the one-year period ending on the date
of such death, provided that if such date of death occurs before the first
anniversary of the date hereof, the cash lump sum payment shall be equal to the
product of three (3) times the sum of (x) Employee's annualized base salary pay
rate in effect as of such date of death and (y) the maximum bonus that would
have been payable for the year that includes such date of death if all of the
conditions for the payment of such maximum bonus had been satisfied, less the
proceeds receivable by Employee's heirs and legal representatives from any life
insurance policy provided by the Company.

                           (c) Termination of Employment Because of Disability.
If Employee's employment is terminated by the Company for disability before the
expiration of the Term, the Company shall pay Employee the Accrued Amount as of
the such date of termination, and, in addition, the consideration described in
Sections 4 and 8 hereof, at the rate in effect at the date of termination, until
one year after Employee becomes eligible to receive benefits pursuant to the
disability insurance policy provided by the Company, at the rate in effect at
such date of termination, less the amount of disability insurance proceeds
receivable by Employee, provided that such period shall not exceed two years in
the aggregate. In addition, Employee shall be entitled to receive an amount
equal to the product that results from multiplying the amount of the bonus paid
to him pursuant to Section 5 hereof for the calendar year prior to the year in
which Employee's employment is terminated for disability multiplied by a
fraction, the numerator of which is the number of days that elapsed prior to the
termination during the year in which the termination occurs and the denominator
of which is 365.

                           (d) Termination of Employment by Company Without
Cause; Resignation for Good Reason. If Employee's employment is terminated by
the Company without Cause, or Employee Resigns for Good Reason, within 30 days
following the date of such termination of employment, the Company shall pay
Employee the Accrued Amount as of the date of such termination, and in addition,
the Company shall make a cash lump sum payment to Employee equal to the sum of
(x) the greater of the amount described in (i) or (ii) below, plus (y) the
"Gross-Up Payment," as defined and more fully provided for in Section 18(g).

                                    (i) the product of three (3) times the
greater of (1) the sum of the amounts paid or payable to Employee pursuant to
Sections 4 and 5 hereunder (and the short-term portion of any bonus amounts paid
or payable pursuant to Section 6 hereunder) for the calendar year preceding the
calendar year in which such termination of employment occurs or (2) the sum of
the amounts paid or payable to Employee pursuant to Sections 4 and 5 hereunder
(and the short-term portion of any bonus amounts paid or payable pursuant to
Section 6 hereunder) during the one-year period ending on the date of such
termination; or



                                       -5-



<PAGE>



                                    (ii) The amount payable pursuant to Section
4 hereunder for the remainder of the Term at a rate equal to his base salary in
effect at the time of the date of such termination.

                           (e) In the event that Employee is employed by a
Subsidiary of the Company at the time of termination of employment, any amounts
payable to the Employee pursuant to this Section 18 shall be reduced by the
amounts paid to Employee by any such Subsidiary.

                           (f) Upon the payment of the amounts payable under
this Section 18, neither the Company nor any of its Subsidiaries shall have any
further obligations hereunder to Employee (or to his estate, heirs,
beneficiaries, or legal representatives, as appropriate, or otherwise) to pay or
provide any base salary, bonus compensation, or fringe benefits, provided that
if Employee Resigns for Good Reason or the Company terminates Employee's
employment without Cause, Company shall, at its own expense, for a thirty-six
(36) month period after the date of termination of employment, arrange to
provide Employee with life, disability, accident and health insurance benefits
substantially similar to those which Employee was entitled to receive
immediately prior to such date of termination.

                           (g) "Gross-Up Payment."

                                    (i) For purposes of this Agreement, the term
"Gross-Up Payment" means an amount such that the net amount retained by
Employee, after deduction of the excise tax imposed under section 4999 of the
Internal Revenue Code of 1986, as amended (the "Code") or any successor
provision of law ("Excise Tax"), on the "Total Payments" (as hereinafter
defined) and any federal, state and local income tax, employment tax and Excise
Tax upon the payment provided for by this Section 18(g), shall be equal to the
excess of the Total Payments (including the payment provided for in clause (y)
of Section 18(d) and in this Section 18(g)) over the payment provided for by
this Section 18(g).

                                    (ii) For purposes of determining whether any
of the Total Payments will be subject to Excise Tax and the amount of such
Excise Tax,

                                           (A) any payments or benefits received
or to be received by Employee in connection with a Change of Control or
Employee's termination of employment (whether pursuant to the terms of this
Agreement or any other plan, arrangement or agreement with the Company or a
Subsidiary, any person whose actions result in a Change of Control or any person
affiliated with the Company or such person (the "Total Payments")) shall be
treated as "parachute payments" (within the meaning of section 280G(b)(2) of the
Code) unless, in the opinion of a tax advisor selected by the Company's
independent auditors and reasonably acceptable to Employee, such payments or
benefits (in whole or in part) do not constitute parachute payments, including
by reason of section 280G(b)(4)(A) of the Code, and all "excess parachute
payments" (within the meaning of section 280G(b)(1) of the Code) shall be
treated as


                                       -6-



<PAGE>



subject to Excise Tax unless, in the opinion of such tax counsel, such excess
parachute payments (in whole or in part) represent reasonable compensation for
services actually rendered (within the meaning of section 280G(b)(4)(B) of the
Code), or are otherwise not subject to Excise Tax; and

                                           (B) the value of any noncash benefits
or deferred payment or benefit shall be determined by the Company's independent
auditors in accordance with the principles of sections 280G(d)(3) and (4) of the
Code. For purposes of determining the amount of the Gross-Up Payment, Employee
shall be deemed to pay federal income tax at the highest marginal rate of
federal income taxation in the calendar year in which the Gross-Up Payment is to
be made and state and local income taxes at the highest marginal rate of
taxation in the state and locality of Employee's residence on the date of
Employee's termination of employment (or such other time as is hereinafter
described), net of the maximum reduction in federal income taxes which could be
obtained from the deduction of such state and local taxes.

                                    (iii) Notwithstanding the foregoing, if the
Excise Tax is subsequently determined to be less than the amount taken into
account hereunder at the time of termination of Employee's employment, Employee
shall repay to the Company, at the time that the amount of such reduction in
Excise Tax is finally determined, the portion of the Gross-Up Payment
attributable to such reduction (plus that portion of the Gross-Up Payment
attributable to the Excise Tax and federal, state and local income tax imposed
on the Gross-Up Payment being repaid by Employee to the extent that such
repayment results in a reduction in Excise Tax or a federal, state or local
income tax deduction), plus interest on the amount of such repayment at the rate
provided in section 1274(b)(2)(B) of the Code. If the Excise Tax is subsequently
determined to exceed the amount taken into account hereunder at the time of
termination of Employee's employment (including by reason of any payment the
existence or amount of which cannot be determined at the time of the Gross-Up
Payment), the Company shall make an additional Gross- Up Payment in respect of
such excess (plus any interest, penalties or additions payable by Employee with
respect to such excess) at the time that the amount of such excess is finally
determined. Employee and the Company shall each reasonably cooperate with the
other in connection with any administrative or judicial proceedings concerning
the existence or amount of liability for Excise Tax with respect to the Total
Payments. Such additional payment shall be made within 30 days following the
date Employee notifies the Company that he is subject to the Excise Tax.

                                    (iv) The Company shall promptly pay in
advance or reimburse Employee for all reasonable legal fees and expenses
incurred in good faith by Employee in connection with any tax audit or
proceeding to the extent attributable to the application of section 4999 of the
Code to any payment or benefit provided hereunder.

                  19. Prior Agreement. This Agreement is the successor to the
Employment Agreement between Employee and the Company dated as of July 31, 1996
(which Agreement was assigned to the Company as of October 31, 1996). Employee
represents to the Company that (a) there are no other agreements or
understandings with the Company to which Employee is a


                                       -7-



<PAGE>



party relating to employment, benefits or retirement, (b) there are no
restrictions, agreements or understandings whatsoever to which Employee is a
party which would prevent or make unlawful his execution of this Agreement or
his employment hereunder, (c) his execution of this Agreement and his employment
hereunder shall not constitute a breach of any contract, agreement or
understanding, oral or written, to which he is a party or by which he is bound,
and (d) he is free and able to execute this Agreement and to continue in the
employment of the Company.

                  20. Key Man Insurance. The Company shall have the right at its
expense to purchase insurance on the life of Employee in such amounts as it
shall from time to time determine, of which the Company shall be the
beneficiary. Employee shall submit to such physical examinations as may be
required, and shall otherwise cooperate with the Company, in connection with the
Company obtaining such insurance.

                  21.      Miscellaneous.

                           (a) Controlling Law. This Agreement, and all
questions relating to its validity, interpretation, performance and enforcement,
shall be governed by and construed in accordance with the laws of the
Commonwealth of Pennsylvania.

                           (b) Notices. All notices, requests, demands and other
communications required or permitted under this Agreement shall be in writing
and shall be deemed to have been duly given, made and received when delivered in
person against receipt, or when sent by United States registered or certified
mail, return receipt requested, postage prepaid, addressed as set forth below:

                         (i)     If to Employee:

                                 Anthony A. Nichols, Sr.
                                 1125 Cymry Drive
                                 Newtown Square, PA 19073

                         (ii)    If to the Company:

                                 Brandywine Realty Trust
                                 16 Campus Boulevard
                                 Suite 150
                                 Newtown Square, PA 19073
                                 Attention: General Counsel

                  In addition, notice by mail shall be by air mail if posted
outside of the continental United States.



                                       -8-



<PAGE>



                  Any party may alter the address to which communications or
copies are to be sent by giving notice of such change of address in conformity
with the provisions of this paragraph for the giving of notice.

                           (c) Binding Nature of Agreement. This Agreement shall
be binding upon and inure to the benefit of the Company and its successors and
assigns and shall be binding upon Employee, his heirs and legal representatives.

                           (d) Execution in Counterparts. This Agreement may be
executed in any number of counterparts, each of which shall be deemed to be an
original as against any party who executes the same, and all of which shall
constitute one and the same instrument. This Agreement shall become binding when
one or more counterparts hereof, individually or taken together, shall bear the
signatures of all of the parties reflected hereon as the signatories.

                           (e) Provisions Separable. The provisions of this
Agreement are independent of and separable from each other, and no provision
shall be affected or rendered invalid or unenforceable by virtue of the fact
that for any reason any other or others of them may be invalid or unenforceable
in whole or in part.

                           (f) Entire Agreement. This Agreement contains the
entire understanding among the parties hereto with respect to the subject matter
hereof and supersedes all prior agreements and understandings, inducements or
conditions, express or implied, oral or written, except as herein contained. The
express terms hereof control and supersede any course of performance and/or
usage of the trade inconsistent with any of the terms hereof. This Agreement may
not be modified or amended other than by an agreement in writing.

                           (g) Section and Paragraph Headings. The section and
paragraph headings in this Agreement are for convenience only; they form no part
of this Agreement and shall not affect its interpretation.

                           (h) Gender, Etc. Words used herein, regardless of the
number and gender specifically used, shall be deemed and construed to include
any other number, singular or plural, and any other gender, masculine, feminine
or neuter, as the context requires.

                           (i) Number of Days. In computing the number of days
for purposes of this Agreement, all days shall be counted, including Saturdays,
Sundays and holidays; provided, however, that if the final day of any time
period falls on a Saturday, Sunday or holiday, then the final day shall be
deemed to be the next day which is not a Saturday, Sunday or holiday.

                           (j) Survival. The provisions of Sections 7, 12, 13,
14, 15, 16, 17, 18 and 19 shall survive the expiration or termination of the
term of Employee's employment hereunder.



                                       -9-



<PAGE>



                           (k) Assignability. This Agreement is not assignable
by Employee. It is assignable by the Company only (i) to any subsidiary of the
Company so long as the Company agrees to guarantee such subsidiary's obligations
hereunder, or (ii) subject to Sections 16 and 18 and only upon Employee's prior
written consent, to a person which is a successor in interest to the Company in
the business operated by it or which acquires all or substantially all of its
assets.

                           (l) Liability of Trustees, etc. No recourse shall be
had for any obligation of the Company hereunder, or for any claim based thereon
or otherwise in respect thereof, against any past, present or future trustee,
shareholder, officer or employee of the Company, whether by virtue of any
statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise, all such liability being expressly waived and released by each party
hereto.

                  IN WITNESS WHEREOF, the parties have caused this Agreement to
be executed and delivered on the date first above-written.

                            BRANDYWINE REALTY TRUST


                               By:    /s/ Gerard H. Sweeney     
                                      ---------------------------------------
                               Title: President and Chief Executive Officer



                            EMPLOYEE

                                      /s/ Anthony A. Nichols, Sr.     
                                      ---------------------------------------
                                      Anthony A. Nichols, Sr.




                                      -10-



<PAGE>


                                    GUARANTEE


                  In the event that the Company fails to perform its obligations
under the foregoing Employment Agreement, Brandywine Operating Partnership, L.P.
shall promptly perform the obligations of the Company arising thereunder which
have not been performed in strict accordance with the terms and conditions
thereof.



                                      BRANDYWINE OPERATING PARTNERSHIP, L.P.

                                      By: BRANDYWINE REALTY TRUST, its
                                          general partner

                                          By:  /s/ Gerard H. Sweeney 
                                               ---------------------------------
                                               Gerard H. Sweeney, President and
                                               Chief Executive Officer




                                      -11-

<PAGE>

                                                                 EXHIBIT 10.37

                    AMENDED AND RESTATED EMPLOYMENT AGREEMENT


                  This Amended and Restated Employment Agreement (the
"Agreement") is made as of December 17, 1998 and amends and restates in its
entirety the Employment Agreement made and entered into as of January 2, 1998,
as amended and restated as of February 11, 1998, by and between Gerard H.
Sweeney ("Employee") and Brandywine Realty Trust, a Maryland real estate
investment trust (the "Company").

                                   BACKGROUND

                  The Company desires to employ Employee, and Employee desires
to enter into the employ of the Company, on the terms and conditions contained
in this Agreement.

                  NOW, THEREFORE, in consideration of the mutual agreements
contained herein, and intending to be legally bound hereby, the parties hereto
agree as follows:

                  1. Employment. The Company hereby employs Employee, and
Employee hereby accepts employment by the Company, for the period and upon the
terms and conditions contained in this Agreement.

                  2. Office and Duties.

                           (a) Employee shall be employed by the Company as its
President and Chief Executive Officer and will serve as a member of the Board of
Trustees of the Company (the "Board") and member of the Executive Committee of
the Board, and shall perform such duties and shall have such authority as may
from time to time be specified by the Board. Employee shall report directly to
the Board.

                           (b) Without further consideration, Employee shall, as
directed by the Board, serve as a director or officer of, or perform such other
duties and services as may be requested for and with respect to, any of the
Company's Subsidiaries, including, without limitation, Brandywine Realty
Services Corporation. As used in this Agreement, the terms "Subsidiary" and
"Subsidiaries" shall mean, with respect to any entity, any corporation,
partnership, limited liability company or other business entity in which the
subject entity has the power (whether by contract, through securities ownership,
or otherwise and whether directly or indirectly through control of one or more
intermediate Subsidiaries) to elect a majority of board of directors or other
governing body, including, in the case of a partnership, a majority of the board
of directors or other governing body of the general partner.

                           (c) Employee shall devote his full working time,
energy, skill and best efforts to the performance of his duties hereunder, in a
manner which will faithfully and diligently further the business interests of
the Company and its Subsidiaries.



                                       -1-



<PAGE>



                  3. Term. Unless sooner terminated as hereinafter provided, the
term of Employee's employment shall extend through December 31, 2003 (the
"Term"). The Term shall automatically renew for additional one-year periods at
the expiration of the then current Term unless either party shall give notice of
his or its election to terminate Employee's employment at least one year prior
to the end of the then-current Term, unless earlier terminated as hereinafter
provided.

                  4. Base Salary. For all of the services rendered by Employee
to the Company and its Subsidiaries, Employee shall receive an aggregate base
salary of $300,000 per annum during the term of his employment hereunder. Such
salary may be paid, at the election of the Company, either by the Company or by
one or more of its Subsidiaries, in such relative proportions as the Company may
determine, as earned in periodic installments in accordance with the Company's
normal payment policies for executive officers. In the event that the Employee
is also employed during any period by a Subsidiary of the Company, the amount of
the base salary payable by the Company during such period shall be reduced by
the amount of salary received by Employee during such period from such
Subsidiary. Employee's base salary shall be subject to review by the Board not
less frequently than annually, and Employee shall receive such salary increases
as the Board may from time to time approve.

                  5. Bonus. Employee shall receive, during the term of his
employment hereunder, such annual bonus as the Board, in its sole discretion,
may determine from time to time. Any such bonus may be based on Employee's
annual performance goals as established by the Board from time to time.

                  6. Participation in Incentive Plans. In addition to Employee's
eligibility to receive annual bonuses pursuant to Section 5, Employee shall be
entitled to participate in short-term and long-term incentive plans as shall be
maintained by the Company from time to time on such terms and conditions as
shall be established by the Board.

                  7. Prior Option and Warrants. Nothing in this Agreement shall
affect the terms and conditions of options and warrants granted by the Company
to Employee before the date of this Agreement. Such options and warrants shall
continue in force as in effect immediately before the date of this Agreement.
Without limiting the generality of the foregoing, the options granted to
Employee under his employment agreement executed on August 8, 1994 (the "1994
Agreement") shall remain in effect, and those provisions of the 1994 Agreement
which govern Employee's entitlement to exercise such options shall continue in
effect as if such 1994 Agreement had not been terminated. In furtherance of the
foregoing, references in Section 4.1(b)(v) of the 1994 Agreement to "the
Company" shall hereafter be construed as references to the Company and its
Subsidiaries.

                  8. Fringe Benefits. Throughout the term of his employment and
as long as they are kept in force by the Company, Employee shall be entitled to
participate in and receive the benefits of any profit sharing plan, retirement
plan, health or other employee benefit plan


                                       -2-



<PAGE>



made available to other executive officers of the Company, but in no event shall
such benefits be less favorable to Employee than the benefits listed on Schedule
A hereto.

                  9. Automobile Allowance. Employee shall receive, during the
term of his employment hereunder, an automobile allowance of $833 per month.

                  10. Expenses. The Company shall reimburse Employee for all
reasonable, ordinary and necessary business expenses incurred by Employee in
connection with the performance of Employee's duties hereunder upon receipt of
vouchers therefor and in accordance with the Company's regular reimbursement
procedures and practices in effect from time to time.

                  11. Vacation. Employee shall be entitled to a vacation of four
(4) weeks during each twelve (12) month period of his employment hereunder,
during which time Employee's compensation hereunder shall be paid in full.
Employee shall be permitted to carry over unused vacation during each twelve
(12) month period during the term and use such unused vacation in any subsequent
twelve (12) month period during the term.

                  12. Disability. If the Board determines in good faith by a
vote of a majority of its members (other than Employee) that Employee is unable
to perform his duties hereunder due to partial or total disability or incapacity
resulting from a mental or physical illness or injury or any similar cause for a
period of one hundred and twenty (120) consecutive days or for a cumulative
period of one hundred and eighty (180) days during any twelve (12) month period,
the Company shall have the right to terminate Employee's employment at any time
thereafter.

                  13. Death. Employee's employment shall terminate at the time
of his death.

                  14. Termination of Employment for Cause. The Company may
discharge Employee at any time for Cause. Cause shall mean: (i) habitual
intoxication; (ii) drug addiction; (iii) intentional and willful violation of
any express direction of the Board; (iv) theft, misappropriation or embezzlement
of the Company's funds; (v) conviction of a felony; or (vi) repeated and
consistent failure of Employee to be present at work during regular hours
without valid reason therefor.

                  15. Termination of Employment Without Cause. The Board, in its
sole discretion, may terminate Employee's employment hereunder without Cause
upon 30 days' prior written notice to Employee at any time.

                  16. Resignation For Good Reason. Employee's resignation shall
be treated as a "Resignation for Good Reason" if Employee resigns within six (6)
months after any of the following circumstances, unless in the case of the
circumstances set forth in paragraphs (b), (c) or (d) below, such circumstances
are fully corrected within 30 days of Employee's delivery of notice to the
Company:



                                       -3-



<PAGE>



                           (a) A reduction in Employee's annual rate of base
salary;

                           (b) A failure of the Company to make the payments
required by Section 4 hereof;

                           (c) A significant adverse alteration in the nature or
status of Employee's responsibilities;

                           (d) Any other material breach by the Company of this
Agreement;

                           (e) Relocation (without the written consent of
Employee) of the Company's executive offices to a location more than 30 miles
from its current location; or

                           (f) Upon a Change of Control (as defined in Section
17).

                  17. Change of Control. For purpose of this Agreement, a
"Change of Control" means:

                           (a) A "Change of Control" within the meaning of
Section 1(d) of the Brandywine Realty Trust 1997 Long-Term Incentive Plan, as
currently in effect; or

                           (b) The purchase of any common shares of beneficial
interest of the Company pursuant to a tender or exchange offer other than an
offer by the Company.

                  18. Payments Upon or After Termination of Employment.

                           (a) Voluntary Resignation Other than for Good Reason;
Termination for Cause; Non-Renewal of Employment Agreement. If Employee's
employment hereunder is terminated before the expiration of the Term because of
Employee's voluntary resignation (other than a Resignation for Good Reason) or
because of the Company's termination of Employee's employment for Cause, or if
Employee's employment is terminated at the expiration of the Term following an
election by either the Company or Employee not to renew the Term pursuant to
Section 3, the Company, or at its direction, its Subsidiaries shall pay to
Employee or, as appropriate, his legal representatives, heirs or estate all
amounts payable under Sections 4 and 8 accrued through the applicable date of
termination (the "Accrued Amount") within 30 days after such date of
termination. If Employee's employment is terminated by the Company for Cause or
by the Employee voluntarily (unless such termination of employment is a
Resignation for Good Reason), or if Employee's employment is terminated at the
expiration of the Term following an election by either the Company or Employee
not to renew the Term pursuant to Section 3, the Company shall have no
obligation or liability hereunder after the date of discharge or termination to
pay or provide base salary, bonus compensation, fringe benefits, or any other
form of compensation hereunder other than to pay the Accrued Amount.



                                       -4-



<PAGE>



                           (b) Termination of Employment Because of Death. If
Employee's employment is terminated as a result of the Employee's death before
the expiration of the Term, the Company shall pay Employee's legal
representatives the Accrued Amount as of the date of Employee's death, and, in
addition, the product of three (3) times the greater of (1) the sum of the
amounts paid or payable to Employee pursuant to Sections 4 and 5 hereunder (and
the short-term portion of any bonus amounts paid or payable pursuant to Section
6 hereunder) for the calendar year preceding the calendar year in which the
death occurs or (2) the sum of the amounts paid or payable to Employee pursuant
to Sections 4 and 5 hereunder (and the short-term portion of any bonus amounts
paid or payable pursuant to Section 6 hereunder) during the one-year period
ending on the date of such death, provided that if such date of death occurs
before the first anniversary of the date hereof, the cash lump sum payment shall
be equal to the product of three (3) times the sum of (x) Employee's annualized
base salary pay rate in effect as of such date of death and (y) the maximum
bonus that would have been payable for the year that includes such date of death
if all of the conditions for the payment of such maximum bonus had been
satisfied, less the proceeds receivable by Employee's heirs and legal
representatives from any life insurance policy provided by the Company.

                           (c) Termination of Employment Because of Disability.
If Employee's employment is terminated by the Company for disability before the
expiration of the Term, the Company shall pay Employee the Accrued Amount as of
the such date of termination, and, in addition, the consideration described in
Sections 4 and 8 hereof, at the rate in effect at the date of termination, until
one year after Employee becomes eligible to receive benefits pursuant to the
disability insurance policy provided by the Company, at the rate in effect at
such date of termination, less the amount of disability insurance proceeds
receivable by Employee, provided that such period shall not exceed two years in
the aggregate. In addition, Employee shall be entitled to receive an amount
equal to the product that results from multiplying the amount of the bonus paid
to him pursuant to Section 5 hereof for the calendar year prior to the year in
which Employee's employment is terminated for disability multiplied by a
fraction, the numerator of which is the number of days that elapsed prior to the
termination during the year in which the termination occurs and the denominator
of which is 365.

                           (d) Termination of Employment by Company Without
Cause; Resignation for Good Reason. If Employee's employment is terminated by
the Company without Cause, or Employee Resigns for Good Reason, within 30 days
following the date of such termination of employment, the Company shall pay
Employee the Accrued Amount as of the date of such termination, and in addition,
the Company shall make a cash lump sum payment to Employee equal to the sum of
(x) the greater of the amount described in (i) or (ii) below, plus (y) the
"Gross-Up Payment," as defined and more fully provided for in Section 18(g).

                                    (i) the product of three (3) times the
greater of (1) the sum of the amounts paid or payable to Employee pursuant to
Sections 4 and 5 hereunder (and the short-term portion of any bonus amounts paid
or payable pursuant to Section 6 hereunder) for the calendar year preceding the
calendar year in which such termination of employment occurs or (2)


                                       -5-



<PAGE>



the sum of the amounts paid or payable to Employee pursuant to Sections 4 and 5
hereunder (and the short-term portion of any bonus amounts paid or payable
pursuant to Section 6 hereunder) during the one-year period ending on the date
of such termination; or

                                    (ii) The amount payable pursuant to Section
4 hereunder for the remainder of the Term at a rate equal to his base salary in
effect at the time of the date of such termination.

                           (e) In the event that Employee is employed by a
Subsidiary of the Company at the time of termination of employment, any amounts
payable to the Employee pursuant to this Section 18 shall be reduced by the
amounts paid to Employee by any such Subsidiary.

                           (f) Upon the payment of the amounts payable under
this Section 18, neither the Company nor any of its Subsidiaries shall have any
further obligations hereunder to Employee (or to his estate, heirs,
beneficiaries, or legal representatives, as appropriate, or otherwise) to pay or
provide any base salary, bonus compensation, or fringe benefits, provided that
if Employee Resigns for Good Reason or the Company terminates Employee's
employment without Cause, Company shall, at its own expense, for a thirty-six
(36) month period after the date of termination of employment, arrange to
provide Employee with life, disability, accident and health insurance benefits
substantially similar to those which Employee was entitled to receive
immediately prior to such date of termination.

                           (g) "Gross-Up Payment."

                                    (i) For purposes of this Agreement, the term
"Gross-Up Payment" means an amount such that the net amount retained by
Employee, after deduction of the excise tax imposed under section 4999 of the
Internal Revenue Code of 1986, as amended (the "Code") or any successor
provision of law ("Excise Tax"), on the "Total Payments" (as hereinafter
defined) and any federal, state and local income tax, employment tax and Excise
Tax upon the payment provided for by this Section 18(g), shall be equal to the
excess of the Total Payments (including the payment provided for in clause (y)
of Section 18(d) and in this Section 18(g)) over the payment provided for by
this Section 18(g).

                                    (ii) For purposes of determining whether any
of the Total Payments will be subject to Excise Tax and the amount of such
Excise Tax,

                                            (A) any payments or benefits
received or to be received by Employee in connection with a Change of Control or
Employee's termination of employment (whether pursuant to the terms of this
Agreement or any other plan, arrangement or agreement with the Company or a
Subsidiary, any person whose actions result in a Change of Control or any person
affiliated with the Company or such person (the "Total Payments")) shall be
treated as "parachute payments" (within the meaning of section 280G(b)(2) of the
Code) unless, in the


                                                      -6-



<PAGE>



opinion of a tax advisor selected by the Company's independent auditors and
reasonably acceptable to Employee, such payments or benefits (in whole or in
part) do not constitute parachute payments, including by reason of section
280G(b)(4)(A) of the Code, and all "excess parachute payments" (within the
meaning of section 280G(b)(1) of the Code) shall be treated as subject to Excise
Tax unless, in the opinion of such tax counsel, such excess parachute payments
(in whole or in part) represent reasonable compensation for services actually
rendered (within the meaning of section 280G(b)(4)(B) of the Code), or are
otherwise not subject to Excise Tax; and

                                            (B) the value of any noncash
benefits or deferred payment or benefit shall be determined by the Company's
independent auditors in accordance with the principles of sections 280G(d)(3)
and (4) of the Code. For purposes of determining the amount of the Gross-Up
Payment, Employee shall be deemed to pay federal income tax at the highest
marginal rate of federal income taxation in the calendar year in which the
Gross-Up Payment is to be made and state and local income taxes at the highest
marginal rate of taxation in the state and locality of Employee's residence on
the date of Employee's termination of employment (or such other time as is
hereinafter described), net of the maximum reduction in federal income taxes
which could be obtained from the deduction of such state and local taxes.

                                    (iii) Notwithstanding the foregoing, if the
Excise Tax is subsequently determined to be less than the amount taken into
account hereunder at the time of termination of Employee's employment, Employee
shall repay to the Company, at the time that the amount of such reduction in
Excise Tax is finally determined, the portion of the Gross-Up Payment
attributable to such reduction (plus that portion of the Gross-Up Payment
attributable to the Excise Tax and federal, state and local income tax imposed
on the Gross-Up Payment being repaid by Employee to the extent that such
repayment results in a reduction in Excise Tax or a federal, state or local
income tax deduction), plus interest on the amount of such repayment at the rate
provided in section 1274(b)(2)(B) of the Code. If the Excise Tax is subsequently
determined to exceed the amount taken into account hereunder at the time of
termination of Employee's employment (including by reason of any payment the
existence or amount of which cannot be determined at the time of the Gross-Up
Payment), the Company shall make an additional Gross- Up Payment in respect of
such excess (plus any interest, penalties or additions payable by Employee with
respect to such excess) at the time that the amount of such excess is finally
determined. Employee and the Company shall each reasonably cooperate with the
other in connection with any administrative or judicial proceedings concerning
the existence or amount of liability for Excise Tax with respect to the Total
Payments. Such additional payment shall be made within 30 days following the
date Employee notifies the Company that he is subject to the Excise Tax.

                                    (iv) The Company shall promptly pay in
advance or reimburse
Employee for all reasonable legal fees and expenses incurred in good faith by
Employee in connection with any tax audit or proceeding to the extent
attributable to the application of section 4999 of the Code to any payment or
benefit provided hereunder.



                                       -7-



<PAGE>



                  19. Prior Agreement. This Agreement is the successor to the
Employment Agreement between Employee and the Company dated as of July 31, 1996
(which Agreement was assigned to the Company as of October 31, 1996). Employee
represents to the Company that (a) there are no other agreements or
understandings with the Company to which Employee is a party relating to
employment, benefits or retirement, (b) there are no restrictions, agreements or
understandings whatsoever to which Employee is a party which would prevent or
make unlawful his execution of this Agreement or his employment hereunder, (c)
his execution of this Agreement and his employment hereunder shall not
constitute a breach of any contract, agreement or understanding, oral or
written, to which he is a party or by which he is bound, and (d) he is free and
able to execute this Agreement and to continue in the employment of the Company.

                  20. Key Man Insurance. The Company shall have the right at its
expense to purchase insurance on the life of Employee in such amounts as it
shall from time to time determine, of which the Company shall be the
beneficiary. Employee shall submit to such physical examinations as may be
required, and shall otherwise cooperate with the Company, in connection with the
Company obtaining such insurance.

                  21.      Miscellaneous.

                           (a) Controlling Law. This Agreement, and all
questions relating to its validity, interpretation, performance and enforcement,
shall be governed by and construed in accordance with the laws of the
Commonwealth of Pennsylvania.

                           (b) Notices. All notices, requests, demands and other
communications required or permitted under this Agreement shall be in writing
and shall be deemed to have been duly given, made and received when delivered in
person against receipt, or when sent by United States registered or certified
mail, return receipt requested, postage prepaid, addressed as set forth below:

                                     (i) If to Employee:                
                                              
                                              Gerard H. Sweeney
                                              2 Craig Lane
                                              Haverford, PA 19041
                                              
                                     (ii) If to the Company:
                                              
                                              Brandywine Realty Trust
                                              16 Campus Boulevard
                                              Suite 150
                                              Newtown Square, PA 19073
                                              Attention: General Counsel
                                              
                                   
                                       -8-



<PAGE>



                  In addition, notice by mail shall be by air mail if posted
outside of the continental United States.

                  Any party may alter the address to which communications or
copies are to be sent by giving notice of such change of address in conformity
with the provisions of this paragraph for the giving of notice.

                           (c) Binding Nature of Agreement. This Agreement shall
be binding upon and inure to the benefit of the Company and its successors and
assigns and shall be binding upon Employee, his heirs and legal representatives.

                           (d) Execution in Counterparts. This Agreement may be
executed in any number of counterparts, each of which shall be deemed to be an
original as against any party who executes the same, and all of which shall
constitute one and the same instrument. This Agreement shall become binding when
one or more counterparts hereof, individually or taken together, shall bear the
signatures of all of the parties reflected hereon as the signatories.

                           (e) Provisions Separable. The provisions of this
Agreement are independent of and separable from each other, and no provision
shall be affected or rendered invalid or unenforceable by virtue of the fact
that for any reason any other or others of them may be invalid or unenforceable
in whole or in part.

                           (f) Entire Agreement. This Agreement contains the
entire understanding among the parties hereto with respect to the subject matter
hereof and supersedes all prior agreements and understandings, inducements or
conditions, express or implied, oral or written, except as herein contained. The
express terms hereof control and supersede any course of performance and/or
usage of the trade inconsistent with any of the terms hereof. This Agreement may
not be modified or amended other than by an agreement in writing.

                           (g) Section and Paragraph Headings. The section and
paragraph headings in this Agreement are for convenience only; they form no part
of this Agreement and shall not affect its interpretation.

                           (h) Gender, Etc. Words used herein, regardless of the
number and gender specifically used, shall be deemed and construed to include
any other number, singular or plural, and any other gender, masculine, feminine
or neuter, as the context requires.

                           (i) Number of Days. In computing the number of days
for purposes of this Agreement, all days shall be counted, including Saturdays,
Sundays and holidays; provided, however, that if the final day of any time
period falls on a Saturday, Sunday or holiday, then the final day shall be
deemed to be the next day which is not a Saturday, Sunday or holiday.



                                       -9-



<PAGE>



                           (j) Survival. The provisions of Sections 7, 12, 13,
14, 15, 16, 17, 18 and 19 shall survive the expiration or termination of the
term of Employee's employment hereunder.

                           (k) Assignability. This Agreement is not assignable
by Employee. It is assignable by the Company only (i) to any subsidiary of the
Company so long as the Company agrees to guarantee such subsidiary's obligations
hereunder, or (ii) subject to Sections 16 and 18 and only upon Employee's prior
written consent, to a person which is a successor in interest to the Company in
the business operated by it or which acquires all or substantially all of its
assets.

                           (l) Liability of Trustees, etc. No recourse shall be
had for any obligation of the Company hereunder, or for any claim based thereon
or otherwise in respect thereof, against any past, present or future trustee,
shareholder, officer or employee of the Company, whether by virtue of any
statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise, all such liability being expressly waived and released by each party
hereto.

                  IN WITNESS WHEREOF, the parties have caused this Agreement to
be executed and delivered on the date first above-written.

                                 BRANDYWINE REALTY TRUST


                                 By:  /s/ Anthony A. Nichols, Sr.  
                                      ---------------------------------
                                 Title:  Chairman of the Board         



                                 EMPLOYEE

                                    /s/ Gerard H. Sweeney     
                                      ---------------------------------
                                          Gerard H. Sweeney




                                      -10-



<PAGE>


                                    GUARANTEE


                  In the event that the Company fails to perform its obligations
under the foregoing Employment Agreement, Brandywine Operating Partnership, L.P.
shall promptly perform the obligations of the Company arising thereunder which
have not been performed in strict accordance with the terms and conditions
thereof.



                                          BRANDYWINE OPERATING PARTNERSHIP, L.P.

                                          By:   BRANDYWINE REALTY TRUST, its
                                                general partner

                                                By: /s/ Anthony A. Nichols, Sr. 
                                                         -----------------------
                                                         Anthony A. Nichols, Sr.
                                                         Chairman of the Board




                                      -11-

<PAGE>

                                                                 EXHIBIT 10.38


                              AMENDED AND RESTATED
                             BRANDYWINE REALTY TRUST
                              NON-QUALIFIED OPTION


                  This is an amendment and restatement of the Non-Qualified
Stock Option Award dated January 2, 1998 (the "Award") from Brandywine Realty
Trust, a Maryland real estate investment trust (the "Company") to Anthony A.
Nichols, Sr. ("Optionee"). Terms used herein as defined terms and not defined
herein have the meanings assigned to them in the Brandywine Realty Trust 1997
Long-Term Incentive Plan, as amended from time to time (the "Plan"). This
amendment and restatement is dated as of January 6, 1999 and restates in its
entirety the Award.


                  1.       Definitions.  As used herein:

                           (a) "Board" means the Board of Trustees of the
Company, as constituted from time to time.

                           (b) "Cause" means "Cause" as defined in the
Employment Agreement or the Plan.

                           (c) "Change of Control" means "Change of Control" as
defined in the Plan.

                           (d) "Closing" means the closing of the acquisition
and sale of the Shares as described in, and subject to the provisions of,
Paragraph 9 hereof.

                           (e) "Closing Date" means the date of the Closing.

                           (f) "Code" means the Internal Revenue Code of 1986,
as amended from time to time, and any successor thereto.

                           (g) "Common Share" means a common share of beneficial
interest, $.01 par value per share, of the Company.

                           (h) "Committee" means the Committee appointed by the
Board in accordance with Section 2 of the Plan, if one is appointed and in
existence at the time of reference. If no committee has been appointed pursuant
to Section 2, or if such a committee is not in existence at the time of
reference, "Committee" means the Board.

                           (i) "Date of Exercise" means the date on which the
notice required by Paragraph 6 hereof is hand-delivered, placed in the United
States mail postage prepaid, or delivered to a telegraph or telex facility.



                                       -1-


<PAGE>



                           (j) "Date of Grant" means January 2, 1998, the date
on which the Company awarded the Option.

                           (k) "Disability" means "Disability" as defined in the
Plan.

                           (l) "Employment Agreement" means the employment
agreement between Optionee and the Company, dated January 2, 1998, or any
subsequent employment agreement between Optionee and the Company as in effect at
the time of determination.

                           (m) "Expiration Date" means the earliest of the
following:

                                    (i)     If the Optionee terminates
                                            employment with the Company for any
                                            reason other than death, Disability
                                            or for Cause, 5:00 p.m. on the date
                                            90 days following such termination
                                            of employment;

                                    (ii)    If the Optionee terminates
                                            employment with the Company because
                                            of death, 5:00 p.m. on the first
                                            anniversary of the date the Optionee
                                            terminates employment because of
                                            such death;

                                    (iii)   If the Optionee terminates
                                            employment with the Company because
                                            of Disability, 5:00 p.m. on the date
                                            six months following such
                                            termination of employment, provided
                                            that if the Optionee dies during
                                            such period, any Option otherwise
                                            exercisable shall be exercisable
                                            until the first anniversary of the
                                            Optionee's death;

                                    (iv)    If the Optionee terminates
                                            employment with the Company for
                                            Cause, 5:00 p.m. on the date of such
                                            termination of employment;

                                    (v)     5:00 p.m. on the day before the
                                            tenth anniversary of the Date of 
                                            Grant;

                                    (vi)    The time provided for in Section 4
                                            hereof.

                           (n) "Fair Market Value" means the Fair Market Value
of a Share, as determined pursuant to the Plan.

                           (o) "100% Shares" means the 197,923 Shares subject to
the Option and described in Paragraph 1(s)(i).



                                       -2-
 

<PAGE>



                           (p) "110% Shares" means the 231,597 Shares subject to
the Option and described in Paragraph 1(s)(ii).

                           (q) "115% Shares" means the 249,438 Shares subject to
the Option and described in Paragraph 1(s)(iii).

                           (r) "Option" means the option to purchase Shares
hereby granted.

                           (s)      "Option Price" means:

                                    (i)     with respect to 197,923 Shares
                                            subject to the Option,
                                            $25.25; and

                                    (ii)    with respect to 231,597 Shares
                                            subject to the Option, $27.78; and

                                    (iii)   with respect to 249,438 Shares
                                            subject to the Option, $29.04.

In the event of any recapitalization, Share distribution or dividend, Share
split or combination, the Option Price shall be equitably and proportionally
adjusted. The Option Price shall also be subject to adjustment pursuant to
Section 3(c) of the Plan.

                           (t) "Resignation for Good Reason" means "Resignation
for Good Reason" as defined in the Employment Agreement.

                           (u) "Shares" means the 678,958 Common Shares which
are the subject of the Option hereby granted. In the event of any
recapitalization, Share distribution or dividend, Share split or combination,
the number of Shares that remain subject to the Option shall be equitably and
proportionally adjusted. The number of Shares that remain subject to the Option
shall also be subject to adjustment pursuant to Section 3(c) of the Plan.

                           (v) "Subsidiary" means, with respect to the Company,
a subsidiary company, whether now or hereafter existing, as defined in section
424(f) of the Code, and any other entity 50% or more of the economic interests
in which are owned, directly or indirectly, by the Company.

                  2. Grant of Option. Subject to the terms and conditions set
forth herein and in the Plan, the Company hereby grants to the Optionee the
Option to purchase any or all of the Shares.



                                       -3-

<PAGE>



                  3.       Time of Exercise of Options.

                           (a) Subject to Paragraph 3(b), the Option may be
exercised after such time or times as set forth below, and shall remain
exercisable until the Expiration Date, when the right to exercise shall
terminate absolutely:

                                    (i)     The Option may be exercised for
                                            twenty percent (20%) of each of (A)
                                            the 100% Shares, (B) the 110%
                                            shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 1998.

                                    (ii)    The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 1999.

                                    (iii)   The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 2000.

                                    (iv)    The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 2001.

                                    (v)     The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 2002.

Notwithstanding the foregoing, the number of Shares available for exercise as
determined under this Paragraph 3(a) shall be rounded down to the nearest whole
Share. No Shares subject to the Option shall first become exercisable following
the Optionee's termination of employment, except as provided in Paragraph 3(b).

                           (b) Notwithstanding Paragraph 3(a), the Option shall
become fully exercisable upon the occurrence of any of the following events:

                                    (i)     A Change of Control;

                                    (ii)    The purchase of any Common Shares
                                            pursuant to a tender or exchange
                                            offer other than offer by the
                                            Company;



                                       -4-


<PAGE>



                                    (iii)   Termination of the Optionee's
                                            employment by the Company or an
                                            Affiliate without Cause; or

                                    (iv)    The Optionee's Resignation for Good
                                            Reason.

                  4. Conversion of Option. In the event that the Option remains
Outstanding upon the occurrence of a Change of Control and Optionee does not
exercise the Option within one business day of the occurrence of the Change of
Control, then the Option shall automatically terminate and Optionee's right to
acquire Common Shares hereunder shall terminate absolutely and, upon such
termination, the Company shall provide for the issuance or delivery to Optionee,
for no consideration, of 79,208 Common Shares, which number shall be subject to
equitable and proportionate adjustment in the event of (i) any prior partial
exercise of the Option or (ii) any split or combination of the Common Shares or
any dividend payable on the Common Shares in the form of Common Shares.

                  5. Payment for Shares. Full payment for Shares purchased upon
the exercise of an Option shall be made in cash or, at the election of the
Optionee and as the Committee may, in its sole discretion, approve, by
surrendering Common Shares with an aggregate Fair Market Value equal to the
aggregate Option Price, or by delivering such combination of Common Shares and
cash as the Committee may, in its sole discretion, approve.

                  6. Manner of Exercise. The Option shall be exercised by giving
written notice of exercise to:

                           Brandywine Realty Trust
                           16 Campus Boulevard
                           Suite 150
                           Newtown Square, PA  19073
                           Attention:  Chief Financial Officer

All notices under this agreement shall be deemed to have been given when
hand-delivered, telecopied or mailed, first class postage prepaid, and shall be
irrevocable once given.

                  7. Nontransferability of Option. The Option may not be
transferred or assigned by the Optionee otherwise than as and to the extent
permitted by Section 5(e) of the Plan; and any attempt at assignment or transfer
contrary to the provisions of the Plan or the levy of any execution, attachment
or similar process upon the Option shall be null and void and without effect.
Any exercise of the Option by a person other than the Optionee shall be
accompanied by appropriate proofs of the right of such person to exercise the
Option.

                  8. Securities Laws. The Committee may from time to time impose
any conditions on the exercise of the Option as it deems necessary or
appropriate to comply with the then-existing requirements of the Securities Act
of 1933, as amended, or of the Securities Exchange Act of 1934, as amended,
including Rule 16b-3 (or any similar rule) of the Securities


                                       -5-
<PAGE>



and Exchange Commission. If the listing, registration or qualification of Shares
issuable on the exercise of the Option upon any securities exchange or under any
federal or state law, or the consent or approval of any governmental regulatory
body is necessary as a condition of or in connection with the purchase of such
Shares, the Company shall not be obligated to issue or deliver the certificates
representing the Shares otherwise issuable on the exercise of the Option unless
and until such listing, registration, qualification, consent or approval shall
have been effected or obtained. If registration is considered unnecessary by the
Company or its counsel, the Company may cause a legend to be placed on such
Shares calling attention to the fact that they have been acquired for investment
and have not been registered.

                  9. Issuance of Certificate at Closing; Payment of Cash.
Subject to the provisions of this Paragraph 9, the Closing Date shall occur as
promptly as is feasible after the exercise of the Option. Subject to the
provisions of Paragraphs 8 and 10 hereof, a certificate for the Shares issuable
on the exercise of the Option shall be delivered to the Optionee or to his
personal representative, heir or legatee at the Closing, provided that no
certificates for Shares will be delivered to the Optionee or to his personal
representative, heir or legatee unless the Option Price has been paid in full.

                  10. Rights Prior to Exercise. The Optionee shall not have any
right as a shareholder with respect to any Shares subject to his Options until
the Option shall have been exercised in accordance with the terms of the Plan
and this Award and the Optionee shall have paid the full purchase price for the
number of Shares in respect of which the Option was exercised, provided that in
the event that the Optionee's employment with the Company is terminated for
Cause, upon a determination by the Committee, the Optionee shall automatically
forfeit all Shares otherwise subject to delivery upon exercise of an Option but
for which the Company has not yet delivered the Share certificates, upon refund
by the Company of the Option Price.

                  11. Status of Option; Interpretation. The Option is intended
to be a non-qualified stock option. Accordingly, it is intended that the
transfer of property pursuant to the exercise of the Option shall be subject to
federal income tax in accordance with section 83 of the Code. The Option is not
intended to qualify as an incentive stock option within the meaning of section
422 of the Code. The interpretation and construction of any provision of this
Option or the Plan made by the Committee shall be final and conclusive and,
insofar as possible, shall be consistent with the intention expressed in this
Paragraph 11.

                  12. Option Not to Affect Employment. The Option granted
hereunder shall not confer upon the Optionee any right to continue in the
employment of the Company or any Subsidiary.


                                       -6-

<PAGE>


                  13.      Miscellaneous.

                           (a) The address for the Optionee to which notice,
demands and other communications to be given or delivered under or by reason of
the provisions hereof shall be the address contained in the Company's personnel
records.

                           (b) This Award and all questions relating to its
validity, interpretation, performance, and enforcement shall be governed by and
construed in accordance with the laws of the Commonwealth of Pennsylvania.

                  14. Withholding of Taxes. Whenever the Company proposes or is
required to deliver or transfer Shares in connection with the exercise of the
Option, or in connection with the conversion of the Option, the Company shall
have the right to (a) require the Optionee to remit to the Company an amount
sufficient to satisfy any federal, state and/or local withholding tax
requirements prior to the delivery or transfer of any certificate or
certificates for such Shares or (b) take whatever action it deems necessary to
protect its interests with respect to tax liabilities.

                  IN WITNESS WHEREOF, the Company has granted this Award on the
day and year first above written.

                                  BRANDYWINE REALTY TRUST


                                  By:   /s/ Gerard H. Sweeney        
                                        --------------------------------------
                                  Title: President and Chief Executive Officer



Accepted:

/s/ Anthony A. Nichols, Sr.
- - -----------------------------------
Anthony A. Nichols, Sr.



                                       -7-

<PAGE>

                                                                 EXHIBIT 10.39

                              AMENDED AND RESTATED
                             BRANDYWINE REALTY TRUST
                              NON-QUALIFIED OPTION


                  This is an amendment and restatement of the Non-Qualified
Stock Option Award dated January 2, 1998 (the "Award") from Brandywine Realty
Trust, a Maryland real estate investment trust (the "Company") to Gerard H.
Sweeney ("Optionee"). Terms used herein as defined terms and not defined herein
have the meanings assigned to them in the Brandywine Realty Trust 1997 Long-Term
Incentive Plan, as amended from time to time (the "Plan"). This amendment and
restatement is dated as of January 6, 1999 and restates in its entirety the
Award.


                  1.       Definitions.  As used herein:

                           (a) "Board" means the Board of Trustees of the
Company, as constituted from time to time.

                           (b) "Cause" means "Cause" as defined in the
Employment Agreement or the Plan.

                           (c) "Change of Control" means "Change of Control" as
defined in the Plan.

                           (d) "Closing" means the closing of the acquisition
and sale of the Shares as described in, and subject to the provisions of,
Paragraph 9 hereof.

                           (e) "Closing Date" means the date of the Closing.

                           (f) "Code" means the Internal Revenue Code of 1986,
as amended from time to time, and any successor thereto.

                           (g) "Common Share" means a common share of beneficial
interest, $.01 par value per share, of the Company.

                           (h) "Committee" means the Committee appointed by the
Board in accordance with Section 2 of the Plan, if one is appointed and in
existence at the time of reference. If no committee has been appointed pursuant
to Section 2, or if such a committee is not in existence at the time of
reference, "Committee" means the Board.

                           (i) "Date of Exercise" means the date on which the
notice required by Paragraph 6 hereof is hand-delivered, placed in the United
States mail postage prepaid, or delivered to a telegraph or telex facility.



                                       -1-


<PAGE>



                           (j) "Date of Grant" means January 2, 1998, the date
on which the Company awarded the Option.

                           (k) "Disability" means "Disability" as defined in the
Plan.

                           (l) "Employment Agreement" means the employment
agreement between Optionee and the Company, dated January 2, 1998, or any
subsequent employment agreement between Optionee and the Company as in effect at
the time of determination.

                           (m) "Expiration Date" means the earliest of the
following:

                                    (i)     If the Optionee terminates
                                            employment with the Company for any
                                            reason other than death, Disability
                                            or for Cause, 5:00 p.m. on the date
                                            90 days following such termination
                                            of employment;

                                    (ii)    If the Optionee terminates
                                            employment with the Company because
                                            of death, 5:00 p.m. on the first
                                            anniversary of the date the Optionee
                                            terminates employment because of
                                            such death;

                                    (iii)   If the Optionee terminates
                                            employment with the Company because
                                            of Disability, 5:00 p.m. on the date
                                            six months following such
                                            termination of employment, provided
                                            that if the Optionee dies during
                                            such period, any Option otherwise
                                            exercisable shall be exercisable
                                            until the first anniversary of the
                                            Optionee's death;

                                    (iv)    If the Optionee terminates
                                            employment with the Company for
                                            Cause, 5:00 p.m. on the date of such
                                            termination of employment;

                                    (v)     5:00 p.m. on the day before the
                                            tenth anniversary of the Date of
                                            Grant;

                                    (vi)    The time provided for in Section 4
                                            hereof.

                           (n) "Fair Market Value" means the Fair Market Value
of a Share, as determined pursuant to the Plan.

                           (o) "100% Shares" means the 296,736 Shares subject to
the Option and described in Paragraph 1(s)(i).



                                       -2-


<PAGE>



                           (p) "110% Shares" means the 347,222 Shares subject to
the Option and described in Paragraph 1(s)(ii).

                           (q) "115% Shares" means the 374,531 Shares subject to
the Option and described in Paragraph 1(s)(iii).

                           (r) "Option" means the option to purchase Shares
hereby granted.

                           (s)      "Option Price" means:

                                    (i)     with respect to 296,736 Shares
                                            subject to the Option, $25.25; and

                                    (ii)    with respect to 347,222 Shares
                                            subject to the Option, $27.78; and

                                    (iii)   with respect to 374,531 Shares
                                            subject to the Option, $29.04.

In the event of any recapitalization, Share distribution or dividend, Share
split or combination, the Option Price shall be equitably and proportionally
adjusted. The Option Price shall also be subject to adjustment pursuant to
Section 3(c) of the Plan.

                           (t) "Resignation for Good Reason" means "Resignation
for Good Reason" as defined in the Employment Agreement.

                           (u) "Shares" means the 1,018,489 Common Shares which
are the subject of the Option hereby granted. In the event of any
recapitalization, Share distribution or dividend, Share split or combination,
the number of Shares that remain subject to the Option shall be equitably and
proportionally adjusted. The number of Shares that remain subject to the Option
shall also be subject to adjustment pursuant to Section 3(c) of the Plan.

                           (v) "Subsidiary" means, with respect to the Company,
a subsidiary company, whether now or hereafter existing, as defined in section
424(f) of the Code, and any other entity 50% or more of the economic interests
in which are owned, directly or indirectly, by the Company.

                  2. Grant of Option. Subject to the terms and conditions set
forth herein and in the Plan, the Company hereby grants to the Optionee the
Option to purchase any or all of the Shares.



                                       -3-


<PAGE>



                  3.       Time of Exercise of Options.

                           (a) Subject to Paragraph 3(b), the Option may be
exercised after such time or times as set forth below, and shall remain
exercisable until the Expiration Date, when the right to exercise shall
terminate absolutely:

                                    (i)     The Option may be exercised for
                                            twenty percent (20%) of each of (A)
                                            the 100% Shares, (B) the 110%
                                            shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 1998.

                                    (ii)    The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 1999.

                                    (iii)   The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 2000.

                                    (iv)    The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 2001.

                                    (v)     The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 2002.

Notwithstanding the foregoing, the number of Shares available for exercise as
determined under this Paragraph 3(a) shall be rounded down to the nearest whole
Share. No Shares subject to the Option shall first become exercisable following
the Optionee's termination of employment, except as provided in Paragraph 3(b).

                           (b) Notwithstanding Paragraph 3(a), the Option shall
become fully exercisable upon the occurrence of any of the following events:

                                    (i)     A Change of Control;

                                    (ii)    The purchase of any Common Shares
                                            pursuant to a tender or exchange
                                            offer other than offer by the
                                            Company;



                                       -4-
 

<PAGE>



                                    (iii)   Termination of the Optionee's
                                            employment by the Company or an
                                            Affiliate without Cause; or

                                    (iv)    The Optionee's Resignation for Good
                                            Reason.

                  4. Conversion of Option. In the event that the Option remains
Outstanding upon the occurrence of a Change of Control and Optionee does not
exercise the Option within one business day of the occurrence of the Change of
Control, then the Option shall automatically terminate and Optionee's right to
acquire Common Shares hereunder shall terminate absolutely and, upon such
termination, the Company shall provide for the issuance or delivery to Optionee,
for no consideration, of 118,812 Common Shares, which number shall be subject to
equitable and proportionate adjustment in the event of (i) any prior partial
exercise of the Option or (ii) any split or combination of the Common Shares or
any dividend payable on the Common Shares in the form of Common Shares.

                  5. Payment for Shares. Full payment for Shares purchased upon
the exercise of an Option shall be made in cash or, at the election of the
Optionee and as the Committee may, in its sole discretion, approve, by
surrendering Common Shares with an aggregate Fair Market Value equal to the
aggregate Option Price, or by delivering such combination of Common Shares and
cash as the Committee may, in its sole discretion, approve.

                  6. Manner of Exercise. The Option shall be exercised by giving
written notice of exercise to:

                           Brandywine Realty Trust
                           16 Campus Boulevard
                           Suite 150
                           Newtown Square, PA  19073
                           Attention:  Chief Financial Officer

All notices under this agreement shall be deemed to have been given when
hand-delivered, telecopied or mailed, first class postage prepaid, and shall be
irrevocable once given.

                  7. Nontransferability of Option. The Option may not be
transferred or assigned by the Optionee otherwise than as and to the extent
permitted by Section 5(e) of the Plan; and any attempt at assignment or transfer
contrary to the provisions of the Plan or the levy of any execution, attachment
or similar process upon the Option shall be null and void and without effect.
Any exercise of the Option by a person other than the Optionee shall be
accompanied by appropriate proofs of the right of such person to exercise the
Option.

                  8. Securities Laws. The Committee may from time to time impose
any conditions on the exercise of the Option as it deems necessary or
appropriate to comply with the then-existing requirements of the Securities Act
of 1933, as amended, or of the Securities Exchange Act of 1934, as amended,
including Rule 16b-3 (or any similar rule) of the Securities


                                       -5-

<PAGE>



and Exchange Commission. If the listing, registration or qualification of Shares
issuable on the exercise of the Option upon any securities exchange or under any
federal or state law, or the consent or approval of any governmental regulatory
body is necessary as a condition of or in connection with the purchase of such
Shares, the Company shall not be obligated to issue or deliver the certificates
representing the Shares otherwise issuable on the exercise of the Option unless
and until such listing, registration, qualification, consent or approval shall
have been effected or obtained. If registration is considered unnecessary by the
Company or its counsel, the Company may cause a legend to be placed on such
Shares calling attention to the fact that they have been acquired for investment
and have not been registered.

                  9. Issuance of Certificate at Closing; Payment of Cash.
Subject to the provisions of this Paragraph 9, the Closing Date shall occur as
promptly as is feasible after the exercise of the Option. Subject to the
provisions of Paragraphs 8 and 10 hereof, a certificate for the Shares issuable
on the exercise of the Option shall be delivered to the Optionee or to his
personal representative, heir or legatee at the Closing, provided that no
certificates for Shares will be delivered to the Optionee or to his personal
representative, heir or legatee unless the Option Price has been paid in full.

                  10. Rights Prior to Exercise. The Optionee shall not have any
right as a shareholder with respect to any Shares subject to his Options until
the Option shall have been exercised in accordance with the terms of the Plan
and this Award and the Optionee shall have paid the full purchase price for the
number of Shares in respect of which the Option was exercised, provided that in
the event that the Optionee's employment with the Company is terminated for
Cause, upon a determination by the Committee, the Optionee shall automatically
forfeit all Shares otherwise subject to delivery upon exercise of an Option but
for which the Company has not yet delivered the Share certificates, upon refund
by the Company of the Option Price.

                  11. Status of Option; Interpretation. The Option is intended
to be a non-qualified stock option. Accordingly, it is intended that the
transfer of property pursuant to the exercise of the Option shall be subject to
federal income tax in accordance with section 83 of the Code. The Option is not
intended to qualify as an incentive stock option within the meaning of section
422 of the Code. The interpretation and construction of any provision of this
Option or the Plan made by the Committee shall be final and conclusive and,
insofar as possible, shall be consistent with the intention expressed in this
Paragraph 11.

                  12. Option Not to Affect Employment. The Option granted
hereunder shall not confer upon the Optionee any right to continue in the
employment of the Company or any Subsidiary.


                                       -6-

<PAGE>


                  13.      Miscellaneous.

                           (a) The address for the Optionee to which notice,
demands and other communications to be given or delivered under or by reason of
the provisions hereof shall be the address contained in the Company's personnel
records.

                           (b) This Award and all questions relating to its
validity, interpretation, performance, and enforcement shall be governed by and
construed in accordance with the laws of the Commonwealth of Pennsylvania.

                  14. Withholding of Taxes. Whenever the Company proposes or is
required to deliver or transfer Shares in connection with the exercise of the
Option, or in connection with the conversion of the Option, the Company shall
have the right to (a) require the Optionee to remit to the Company an amount
sufficient to satisfy any federal, state and/or local withholding tax
requirements prior to the delivery or transfer of any certificate or
certificates for such Shares or (b) take whatever action it deems necessary to
protect its interests with respect to tax liabilities.

                  IN WITNESS WHEREOF, the Company has granted this Award on the
day and year first above written.

                                       BRANDYWINE REALTY TRUST

                                       By:   /s/ Anthony A. Nichols, Sr.  
                                             ------------------------------- 
                                       Title: Chairman of the Board


Accepted:

/s/ Gerard H. Sweeney
- - -------------------------------
Gerard H. Sweeney



                                       -7-

<PAGE>

                                                                 EXHIBIT 10.40

                              AMENDED AND RESTATED
                             BRANDYWINE REALTY TRUST
                              NON-QUALIFIED OPTION


                  This is an amendment and restatement of the Non-Qualified
Stock Option Award dated January 2, 1998 (the "Award") from Brandywine Realty
Trust, a Maryland real estate investment trust (the "Company") to John M.
Adderly, Jr. ("Optionee"). Terms used herein as defined terms and not defined
herein have the meanings assigned to them in the Brandywine Realty Trust 1997
Long-Term Incentive Plan, as amended from time to time (the "Plan"). This
amendment and restatement is dated as of January 6, 1999 and restates in its
entirety the Award.


                  1.       Definitions.  As used herein:

                           (a) "Board" means the Board of Trustees of the
Company, as constituted from time to time.

                           (b) "Cause" means "Cause" as defined in the Plan.

                           (c) "Change of Control" means "Change of Control" as
defined in the Plan.

                           (d) "Closing" means the closing of the acquisition
and sale of the Shares as described in, and subject to the provisions of,
Paragraph 9 hereof.

                           (e) "Closing Date" means the date of the Closing.

                           (f) "Code" means the Internal Revenue Code of 1986,
as amended from time to time, and any successor thereto.

                           (g) "Common Share" means a common share of beneficial
interest, $.01 par value per share, of the Company.

                           (h) "Committee" means the Committee appointed by the
Board in accordance with Section 2 of the Plan, if one is appointed and in
existence at the time of reference. If no committee has been appointed pursuant
to Section 2, or if such a committee is not in existence at the time of
reference, "Committee" means the Board.

                           (i) "Date of Exercise" means the date on which the
notice required by Paragraph 6 hereof is hand-delivered, placed in the United
States mail postage prepaid, or delivered to a telegraph or telex facility.

                           (j) "Date of Grant" means January 2, 1998, the date
on which the Company awarded the Option.


                                       -1-


<PAGE>




                           (k) "Disability" means "Disability" as defined in the
Plan.

                           (l) "Expiration Date" means the earliest of the
following:

                                    (i)     If the Optionee terminates
                                            employment with the Company for any
                                            reason other than death, Disability
                                            or for Cause, 5:00 p.m. on the date
                                            90 days following such termination
                                            of employment;

                                    (ii)    If the Optionee terminates
                                            employment with the Company because
                                            of death, 5:00 p.m. on the first
                                            anniversary of the date the Optionee
                                            terminates employment because of
                                            such death;

                                    (iii)   If the Optionee terminates
                                            employment with the Company because
                                            of Disability, 5:00 p.m. on the date
                                            six months following such
                                            termination of employment, provided
                                            that if the Optionee dies during
                                            such period, any Option otherwise
                                            exercisable shall be exercisable
                                            until the first anniversary of the
                                            Optionee's death;

                                    (iv)    If the Optionee terminates
                                            employment with the Company for
                                            Cause, 5:00 p.m. on the date of such
                                            termination of employment;

                                    (v)     5:00 p.m. on the day before the
                                            tenth anniversary of the Date of
                                            Grant;

                                    (vi)    The time provided for in Section 4
                                            hereof.

                           (m) "Fair Market Value" means the Fair Market Value
of a Share, as determined pursuant to the Plan.

                           (n) "100% Shares" means the 26,409 Shares subject to
the Option and described in Paragraph 1(s)(i).

                           (o) "110% Shares" means the 30,902 Shares subject to
the Option and described in Paragraph 1(s)(ii).

                           (p) "115% Shares" means the 33,333 Shares subject to
the Option and described in Paragraph 1(s)(iii).

                           (q) "Option" means the option to purchase Shares
hereby granted.


                                       -2-


<PAGE>




                           (r) "Option Price" means:

                                    (i)     with respect to 26,409 Shares
                                            subject to the Option, $25.25; and

                                    (ii)    with respect to 30,902 Shares
                                            subject to the Option, $27.78; and

                                    (iii)   with respect to 33,333 Shares
                                            subject to the Option, $29.04.

In the event of any recapitalization, Share distribution or dividend, Share
split or combination, the Option Price shall be equitably and proportionally
adjusted. The Option Price shall also be subject to adjustment pursuant to
Section 3(c) of the Plan.

                           (s) "Shares" means the 90,644 Common Shares which are
the subject of the Option hereby granted. In the event of any recapitalization,
Share distribution or dividend, Share split or combination, the number of Shares
that remain subject to the Option shall be equitably and proportionally
adjusted. The number of Shares that remain subject to the Option shall also be
subject to adjustment pursuant to Section 3(c) of the Plan.

                           (t) "Subsidiary" means, with respect to the Company,
a subsidiary company, whether now or hereafter existing, as defined in section
424(f) of the Code, and any other entity 50% or more of the economic interests
in which are owned, directly or indirectly, by the Company.

                  2. Grant of Option. Subject to the terms and conditions set
forth herein and in the Plan, the Company hereby grants to the Optionee the
Option to purchase any or all of the Shares.

                  3.       Time of Exercise of Options.

                           (a) Subject to Paragraph 3(b), the Option may be
exercised after such time or times as set forth below, and shall remain
exercisable until the Expiration Date, when the right to exercise shall
terminate absolutely:

                                    (i)     The Option may be exercised for
                                            twenty percent (20%) of each of (A)
                                            the 100% Shares, (B) the 110%
                                            shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 1998.

                                    (ii)    The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the


                                       -3-

<PAGE>



                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 1999.

                                    (iii)   The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 2000.

                                    (iv)    The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 2001.

                                    (v)     The Option may be exercised for an
                                            additional twenty percent (20%) of
                                            each of (A) the 100% Shares, (B) the
                                            110% Shares, and (C) the 115% Shares
                                            subject to the Option following
                                            December 31, 2002.

Notwithstanding the foregoing, the number of Shares available for exercise as
determined under this Paragraph 3(a) shall be rounded down to the nearest whole
Share. No Shares subject to the Option shall first become exercisable following
the Optionee's termination of employment, except as provided in Paragraph 3(b).

                           (b) Notwithstanding Paragraph 3(a), the Option shall
become fully exercisable upon the occurrence of a Change of Control.

                  4. Conversion of Option. In the event that the Option remains
Outstanding upon the occurrence of a Change of Control and Optionee does not
exercise the Option within one business day of the occurrence of the Change of
Control, then the Option shall automatically terminate and Optionee's right to
acquire Common Shares hereunder shall terminate absolutely and, upon such
termination, the Company shall provide for the issuance or delivery to Optionee,
for no consideration, of 10,575 Common Shares, which number shall be subject to
equitable and proportionate adjustment in the event of (i) any prior partial
exercise of the Option or (ii) any split or combination of the Common Shares or
any dividend payable on the Common Shares in the form of Common Shares.

                  5. Payment for Shares. Full payment for Shares purchased upon
the exercise of an Option shall be made in cash or, at the election of the
Optionee and as the Committee may, in its sole discretion, approve, by
surrendering Common Shares with an aggregate Fair Market Value equal to the
aggregate Option Price, or by delivering such combination of Common Shares and
cash as the Committee may, in its sole discretion, approve.



                                       -4-


<PAGE>



                  6. Manner of Exercise. The Option shall be exercised by giving
written notice of exercise to:

                           Brandywine Realty Trust
                           16 Campus Boulevard
                           Suite 150
                           Newtown Square, PA  19073
                           Attention:  Chief Financial Officer

All notices under this agreement shall be deemed to have been given when
hand-delivered, telecopied or mailed, first class postage prepaid, and shall be
irrevocable once given.

                  7. Nontransferability of Option. The Option may not be
transferred or assigned by the Optionee otherwise than as and to the extent
permitted by Section 5(e) of the Plan; and any attempt at assignment or transfer
contrary to the provisions of the Plan or the levy of any execution, attachment
or similar process upon the Option shall be null and void and without effect.
Any exercise of the Option by a person other than the Optionee shall be
accompanied by appropriate proofs of the right of such person to exercise the
Option.

                  8. Securities Laws. The Committee may from time to time impose
any conditions on the exercise of the Option as it deems necessary or
appropriate to comply with the then-existing requirements of the Securities Act
of 1933, as amended, or of the Securities Exchange Act of 1934, as amended,
including Rule 16b-3 (or any similar rule) of the Securities and Exchange
Commission. If the listing, registration or qualification of Shares issuable on
the exercise of the Option upon any securities exchange or under any federal or
state law, or the consent or approval of any governmental regulatory body is
necessary as a condition of or in connection with the purchase of such Shares,
the Company shall not be obligated to issue or deliver the certificates
representing the Shares otherwise issuable on the exercise of the Option unless
and until such listing, registration, qualification, consent or approval shall
have been effected or obtained. If registration is considered unnecessary by the
Company or its counsel, the Company may cause a legend to be placed on such
Shares calling attention to the fact that they have been acquired for investment
and have not been registered.

                  9. Issuance of Certificate at Closing; Payment of Cash.
Subject to the provisions of this Paragraph 9, the Closing Date shall occur as
promptly as is feasible after the exercise of the Option. Subject to the
provisions of Paragraphs 8 and 10 hereof, a certificate for the Shares issuable
on the exercise of the Option shall be delivered to the Optionee or to his
personal representative, heir or legatee at the Closing, provided that no
certificates for Shares will be delivered to the Optionee or to his personal
representative, heir or legatee unless the Option Price has been paid in full.

                  10. Rights Prior to Exercise. The Optionee shall not have any
right as a shareholder with respect to any Shares subject to his Options until
the Option shall have been exercised in accordance with the terms of the Plan
and this Award and the Optionee shall have


                                       -5-
<PAGE>



paid the full purchase price for the number of Shares in respect of which the
Option was exercised, provided that in the event that the Optionee's employment
with the Company is terminated for Cause, upon a determination by the Committee,
the Optionee shall automatically forfeit all Shares otherwise subject to
delivery upon exercise of an Option but for which the Company has not yet
delivered the Share certificates, upon refund by the Company of the Option
Price.

                  11. Status of Option; Interpretation. The Option is intended
to be a non-qualified stock option. Accordingly, it is intended that the
transfer of property pursuant to the exercise of the Option shall be subject to
federal income tax in accordance with section 83 of the Code. The Option is not
intended to qualify as an incentive stock option within the meaning of section
422 of the Code. The interpretation and construction of any provision of this
Option or the Plan made by the Committee shall be final and conclusive and,
insofar as possible, shall be consistent with the intention expressed in this
Paragraph 11.

                  12. Option Not to Affect Employment. The Option granted
hereunder shall not confer upon the Optionee any right to continue in the
employment of the Company or any Subsidiary.

                  13.      Miscellaneous.

                           (a) The address for the Optionee to which notice,
demands and other communications to be given or delivered under or by reason of
the provisions hereof shall be the address contained in the Company's personnel
records.

                           (b) This Award and all questions relating to its
validity, interpretation, performance, and enforcement shall be governed by and
construed in accordance with the laws of the Commonwealth of Pennsylvania.

                  14. Withholding of Taxes. Whenever the Company proposes or is
required to deliver or transfer Shares in connection with the exercise of the
Option, or in connection with the conversion of the Option, the Company shall
have the right to (a) require the Optionee to remit to the Company an amount
sufficient to satisfy any federal, state and/or local withholding tax
requirements prior to the delivery or transfer of any certificate or
certificates for such Shares or (b) take whatever action it deems necessary to
protect its interests with respect to tax liabilities.



                                       -6-


<PAGE>


                  IN WITNESS WHEREOF, the Company has granted this Award on the
day and year first above written.

                                BRANDYWINE REALTY TRUST



                                By:    /s/ Gerard H. Sweeney 
                                       --------------------------------------
                                Title: President and Chief Executive Officer



Accepted:

/s/ John M. Adderly, Jr.   
- - ----------------------------------
John M. Adderly, Jr.



                                       -7-

<PAGE>

                                                                 EXHIBIT 10.41

                             BRANDYWINE REALTY TRUST
                              NON-QUALIFIED OPTION


                  This is a Non-Qualified Stock Option Award dated January 19,
1999 (the "Award") from Brandywine Realty Trust, a Maryland real estate
investment trust (the "Company") to Jeffrey F. Rogatz ("Optionee"). Terms used
herein as defined terms and not defined herein have the meanings assigned to
them in the Brandywine Realty Trust 1997 Long- Term Incentive Plan, as amended
from time to time (the "Plan").

                  1.       Definitions.  As used herein:

                           (a) "Board" means the Board of Trustees of the
Company, as constituted from time to time.

                           (b) "Cause" means "Cause" as defined in the Plan.

                           (c) "Change of Control" means "Change of Control" as
defined in the Plan.

                           (d) "Closing" means the closing of the acquisition
and sale of the Shares as described in, and subject to the provisions of,
Paragraph 9 hereof.

                           (e) "Closing Date" means the date of the Closing.

                           (f) "Code" means the Internal Revenue Code of 1986,
as amended from time to time, and any successor thereto.

                           (g) "Common Share" means a common share of beneficial
interest, $.01 par value per share, of the Company.

                           (h) "Committee" means the Committee appointed by the
Board in accordance with Section 2 of the Plan, if one is appointed and in
existence at the time of reference. If no committee has been appointed pursuant
to Section 2, or if such a committee is not in existence at the time of
reference, "Committee" means the Board.

                           (i) "Date of Exercise" means the date on which the
notice required by Paragraph 6 hereof is hand-delivered, placed in the United
States mail postage prepaid, or delivered to a telegraph or telex facility.

                           (j) "Date of Grant" means the date of this Award set
forth above.

                           (k) "Disability" means "Disability" as defined in the
Plan.

                           (l) "Expiration Date" means the earliest of the
following:


                                       -1-


<PAGE>




                                    (i)     If the Optionee terminates
                                            employment with the Company for any
                                            reason other than death, Disability
                                            or for Cause, 5:00 p.m. on the date
                                            90 days following such termination
                                            of employment;

                                    (ii)    If the Optionee terminates
                                            employment with the Company because
                                            of death, 5:00 p.m. on the first
                                            anniversary of the date the Optionee
                                            terminates employment because of
                                            such death;

                                    (iii)   If the Optionee terminates
                                            employment with the Company because
                                            of Disability, 5:00 p.m. on the date
                                            six months following such
                                            termination of employment, provided
                                            that if the Optionee dies during
                                            such period, any Option otherwise
                                            exercisable shall be exercisable
                                            until the first anniversary of the
                                            Optionee's death;

                                    (iv)    If the Optionee terminates
                                            employment with the Company for
                                            Cause, 5:00 p.m. on the date of such
                                            termination of employment;

                                    (v)     5:00 p.m. on the day before the
                                            ninth anniversary of the Date of
                                            Grant;

                                    (vi)    The time provided for in Section 4
                                            hereof.

                           (m) "Fair Market Value" means the Fair Market Value
of a Share, as determined pursuant to the Plan.

                           (n) "100% Shares" means the 16,485 Shares subject to
the Option and described in Paragraph 1(s)(i).

                           (o) "110% Shares" means the 19,290 Shares subject to
the Option and described in Paragraph 1(s)(ii).

                           (p) "115% Shares" means the 20,807 Shares subject to
the Option and described in Paragraph 1(s)(iii).

                           (q) "Option" means the option to purchase Shares
hereby granted.

                           (r)      "Option Price" means:



                                       -2-


<PAGE>



                                    (i)     with respect to 16,485 Shares
                                            subject to the Option, $25.25; and

                                    (ii)    with respect to 19,290 Shares
                                            subject to the Option, $27.78; and

                                    (iii)   with respect to 20,807 Shares
                                            subject to the Option, $29.04.

In the event of any recapitalization, Share distribution or dividend, Share
split or combination, the Option Price shall be equitably and proportionally
adjusted. The Option Price shall also be subject to adjustment pursuant to
Section 3(c) of the Plan.

                           (s) "Shares" means the 56,582 Common Shares which are
the subject of the Option hereby granted. In the event of any recapitalization,
Share distribution or dividend, Share split or combination, the number of Shares
that remain subject to the Option shall be equitably and proportionally
adjusted. The number of Shares that remain subject to the Option shall also be
subject to adjustment pursuant to Section 3(c) of the Plan.

                           (t) "Subsidiary" means, with respect to the Company,
a subsidiary company, whether now or hereafter existing, as defined in section
424(f) of the Code, and any other entity 50% or more of the economic interests
in which are owned, directly or indirectly, by the Company.

                  2. Grant of Option. Subject to the terms and conditions set
forth herein and in the Plan, the Company hereby grants to the Optionee the
Option to purchase any or all of the Shares.

                  3.       Time of Exercise of Options.

                           (a) Subject to Paragraph 3(b), the Option may be
exercised after such time or times as set forth below, and shall remain
exercisable until the Expiration Date, when the right to exercise shall
terminate absolutely:

                                    (i)     The Option may be exercised for an
                                            additional twenty five percent (25%)
                                            of each of (A) the 100% Shares, (B)
                                            the 110% Shares, and (C) the 115%
                                            Shares subject to the Option
                                            following December 31, 1999.

                                    (ii)    The Option may be exercised for an
                                            additional twenty five percent (25%)
                                            of each of (A) the 100% Shares, (B)
                                            the 110% Shares, and (C) the 115%
                                            Shares subject to the Option
                                            following December 31, 2000.



                                       -3-


<PAGE>



                                    (iii)   The Option may be exercised for an
                                            additional twenty five percent (25%)
                                            of each of (A) the 100% Shares, (B)
                                            the 110% Shares, and (C) the 115%
                                            Shares subject to the Option
                                            following December 31, 2001.

                                    (iv)    The Option may be exercised for an
                                            additional twenty five percent (25%)
                                            of each of (A) the 100% Shares, (B)
                                            the 110% Shares, and (C) the 115%
                                            Shares subject to the Option
                                            following December 31, 2002.

Notwithstanding the foregoing, the number of Shares available for exercise as
determined under this Paragraph 3(a) shall be rounded down to the nearest whole
Share. No Shares subject to the Option shall first become exercisable following
the Optionee's termination of employment, except as provided in Paragraph 3(b).

                           (b) Notwithstanding Paragraph 3(a), the Option shall
become fully exercisable upon the occurrence of any of the following events:

                                    (i)     A Change of Control;

                                    (ii)    The purchase of any Common Shares
                                            pursuant to a tender or exchange
                                            offer other than offer by the
                                            Company;

                                    (iii)   Termination of the Optionee's
                                            employment by the Company or an
                                            Affiliate without Cause; or

                                    (iv)    The Optionee's Resignation for Good
                                            Reason.

                  4. Conversion of Option. In the event that the Option remains
Outstanding upon the occurrence of a Change of Control and Optionee does not
exercise the Option within one business day of the occurrence of the Change of
Control, then the Option shall automatically terminate and Optionee's right to
acquire Common Shares hereunder shall terminate absolutely and, upon such
termination, the Company shall provide for the issuance or delivery to Optionee,
for no consideration, of 6,601 Common Shares, which number shall be subject to
equitable and proportionate adjustment in the event of (i) any prior partial
exercise of the Option or (ii) any split or combination of the Common Shares or
any dividend payable on the Common Shares in the form of Common Shares.

                  5. Payment for Shares. Full payment for Shares purchased upon
the exercise of an Option shall be made in cash or, at the election of the
Optionee and as the Committee may, in its sole discretion, approve, by
surrendering Common Shares with an aggregate Fair Market Value equal to the
aggregate Option Price, or by delivering such combination of Common Shares and
cash as the Committee may, in its sole discretion, approve.



                                       -4-


<PAGE>



                  6. Manner of Exercise. The Option shall be exercised by giving
written notice of exercise to:

                           Brandywine Realty Trust
                           16 Campus Boulevard
                           Suite 150
                           Newtown Square, PA  19073
                           Attention:  Chief Executive Officer

All notices under this agreement shall be deemed to have been given when
hand-delivered, telecopied or mailed, first class postage prepaid, and shall be
irrevocable once given.

                  7. Nontransferability of Option. The Option may not be
transferred or assigned by the Optionee otherwise than as and to the extent
permitted by Section 5(e) of the Plan; and any attempt at assignment or transfer
contrary to the provisions of the Plan or the levy of any execution, attachment
or similar process upon the Option shall be null and void and without effect.
Any exercise of the Option by a person other than the Optionee shall be
accompanied by appropriate proofs of the right of such person to exercise the
Option.

                  8. Securities Laws. The Committee may from time to time impose
any conditions on the exercise of the Option as it deems necessary or
appropriate to comply with the then-existing requirements of the Securities Act
of 1933, as amended, or of the Securities Exchange Act of 1934, as amended,
including Rule 16b-3 (or any similar rule) of the Securities and Exchange
Commission. If the listing, registration or qualification of Shares issuable on
the exercise of the Option upon any securities exchange or under any federal or
state law, or the consent or approval of any governmental regulatory body is
necessary as a condition of or in connection with the purchase of such Shares,
the Company shall not be obligated to issue or deliver the certificates
representing the Shares otherwise issuable on the exercise of the Option unless
and until such listing, registration, qualification, consent or approval shall
have been effected or obtained. If registration is considered unnecessary by the
Company or its counsel, the Company may cause a legend to be placed on such
Shares calling attention to the fact that they have been acquired for investment
and have not been registered.

                  9. Issuance of Certificate at Closing; Payment of Cash.
Subject to the provisions of this Paragraph 9, the Closing Date shall occur as
promptly as is feasible after the exercise of the Option. Subject to the
provisions of Paragraphs 8 and 10 hereof, a certificate for the Shares issuable
on the exercise of the Option shall be delivered to the Optionee or to his
personal representative, heir or legatee at the Closing, provided that no
certificates for Shares will be delivered to the Optionee or to his personal
representative, heir or legatee unless the Option Price has been paid in full.

                  10. Rights Prior to Exercise. The Optionee shall not have any
right as a shareholder with respect to any Shares subject to his Options until
the Option shall have been exercised in accordance with the terms of the Plan
and this Award and the Optionee shall have


                                       -5-

<PAGE>



paid the full purchase price for the number of Shares in respect of which the
Option was exercised, provided that in the event that the Optionee's employment
with the Company is terminated for Cause, upon a determination by the Committee,
the Optionee shall automatically forfeit all Shares otherwise subject to
delivery upon exercise of an Option but for which the Company has not yet
delivered the Share certificates, upon refund by the Company of the Option
Price.

                  11. Status of Option; Interpretation. The Option is intended
to be a non-qualified stock option. Accordingly, it is intended that the
transfer of property pursuant to the exercise of the Option shall be subject to
federal income tax in accordance with section 83 of the Code. The Option is not
intended to qualify as an incentive stock option within the meaning of section
422 of the Code. The interpretation and construction of any provision of this
Option or the Plan made by the Committee shall be final and conclusive and,
insofar as possible, shall be consistent with the intention expressed in this
Paragraph 11.

                  12. Option Not to Affect Employment. The Option granted
hereunder shall not confer upon the Optionee any right to continue in the
employment of the Company or any Subsidiary.

                  13.      Miscellaneous.

                           (a) The address for the Optionee to which notice,
demands and other communications to be given or delivered under or by reason of
the provisions hereof shall be the address contained in the Company's personnel
records.

                           (b) This Award and all questions relating to its
validity, interpretation, performance, and enforcement shall be governed by and
construed in accordance with the laws of the Commonwealth of Pennsylvania.

                  14. Withholding of Taxes. Whenever the Company proposes or is
required to deliver or transfer Shares in connection with the exercise of the
Option, or in connection with the conversion of the Option, the Company shall
have the right to (a) require the Optionee to remit to the Company an amount
sufficient to satisfy any federal, state and/or local withholding tax
requirements prior to the delivery or transfer of any certificate or
certificates for such Shares or (b) take whatever action it deems necessary to
protect its interests with respect to tax liabilities.




                                       -6-


<PAGE>


                  IN WITNESS WHEREOF, the Company has granted this Award on the
day and year first above written.

                                  BRANDYWINE REALTY TRUST


                                  By:    /s/ Gerard H. Sweeney      
                                         --------------------------------------
                                  Title: President and Chief Executive Officer



Accepted:

/s/ Jeffrey F. Rogatz
- - --------------------------------------
Jeffrey F. Rogatz



                                       -7-

<PAGE>

                             BRANDYWINE REALTY TRUST
                           LONG-TERM PERFORMANCE AWARD
                           ---------------------------


                  This is a Long-Term Performance Award dated December 31, 1998
(the "Effective Date") from Brandywine Realty Trust, a Maryland real estate
investment trust (the "Company") to Anthony A. Nichols, Sr. ("Grantee"). Terms
used herein as defined terms and not defined herein have the meanings assigned
to them in the Brandywine Realty Trust 1997 Long-Term Incentive Plan, as amended
from time to time (the "Plan").

                  1.  Definitions.  As used herein:

                           (a) "Award" means the Long-Term Performance Award
hereby granted.

                           (b) "Board" means the Board of Trustees of the
Company, as constituted from time to time.

                           (c) "Change of Control" means "Change of Control" as
defined in the Plan; provided that if the Grantee has entered into an employment
agreement with the Company that includes the term "Change of Control", then the
term "Change of Control" as used herein shall include both the definition in the
Plan and in the employment agreement.

                           (d) "Code" means the Internal Revenue Code of 1986,
as amended from time to time, and any successor thereto.

                           (e) "Committee" means the Committee appointed by the
Board in accordance with Section 2 of the Plan, if one is appointed and in
existence at the time of reference. If no committee has been appointed pursuant
to Section 2 of the Plan, or if such a committee is not in existence at the time
of reference, "Committee" means the Board.

                           (f) "Elective Shares" means the Shares described in
Paragraph 3(b) hereof.

                           (g) "Employer" means the Company or the Subsidiary
for which Grantee is performing services on the applicable Vesting Date.

                           (h) "Mandatory Shares" means the Shares described in
Paragraph 3(a) hereof.

                           (i) "Plan Year" means the calendar year in which the
Effective Date occurs.

<PAGE>




                           (j) "Restricted Period" means, with respect to each
Restricted Share issued upon satisfaction of the applicable performance
criteria, the period beginning on the date such Restricted Shares are issued and
ending on the Vesting Date.

                           (k) "Restricted Shares" means the Shares described in
Paragraph 3(c) hereof.

                           (l) "Rule 16b-3" means Rule 16b-3 promulgated under
the Exchange Act, as in effect from time to time.

                           (m) "Share" means a common share of beneficial
interest, $.01 par value per share, of the Company, subject to substitution or
adjustment as provided in Paragraph 3(c) of the Plan.

                           (n) "Subsidiary" means, with respect to the Company
or parent, a subsidiary company, whether now or hereafter existing, as defined
in section 424(f) and (g) of the Code, and any other entity 50% or more of the
economic interests in which are owned, directly or indirectly, by the Company.

                           (o) "Vesting Date" means December 31, 2000.

                  2. Amount of Award.

                           (a) In General. Subject to the terms and conditions
set forth herein and in the Plan, the Company hereby grants to Grantee the right
to receive an Award, the amount of which shall be a percentage of such Grantee's
base salary, based on the attainment of the performance criteria specified on
Attachment A hereto.

                           (b) Condition to Payment of Award. Except as
specified in Paragraph 2(c) hereof, in order to be eligible for payment under
the terms of the Award, the Grantee must be employed by the Company or a
Subsidiary on the last day of the Plan Year.

                           (c) Partial Year Employment.

                                    (i) If the Grantee's employment with the
Company or a Subsidiary terminates prior to the last day of the Plan Year other
than due to death, Disability or Retirement, the Award shall be forfeited
immediately upon such termination.

                                    (ii) If the Grantee's employment terminates
prior to the last day of the Plan Year due to death, Disability or Retirement,
the Grantee shall be eligible to receive a portion of the Award, determined by
multiplying the Award, as determined after the close of the Plan Year, by a
fraction, the numerator of which is the Grantee's full and partial months of
employment during the Plan Year and the denominator of which is twelve (12).


                                       -2-

<PAGE>



                  3. Form and Time of Payment.

                           (a) Mandatory Shares. A minimum of twenty-five
percent (25%) of the Award shall be paid in the form of Mandatory Shares, the
number of which shall be determined as the quotient obtained by dividing (x) 25%
of the Award by (y) the Fair Market Value per Share determined as of the last
day of the Plan Year. Except as otherwise provided in Paragraph 3(b), the
remainder of the Award shall be paid in the form of a cash lump sum. Both the
Mandatory Shares and the cash lump sum portions of the Award shall be issued or
paid, as applicable, as soon as reasonably practicable after the close of the
Plan Year.

                           (b) Elective Shares. If the Grantee so indicates on
the Election contained in Attachment B hereto, an additional percentage of the
Award may be paid in the form of Elective Shares, the number of which shall be
determined as the quotient obtained by dividing (x) the percentage of the Award
elected by the Grantee by (y) the Fair Market Value per Share determined as of
the last day of the Plan Year; provided that such Election is submitted to the
Company by the end of the Plan Year. Except as otherwise provided in Paragraph 6
hereof, until the Vesting Date, Elective Shares shall be held by the Company in
escrow.

                           (c) Restricted Shares. Subject to the restrictions
set forth in Paragraph 4 hereof, if the Grantee elects to receive Elective
Shares, the Grantee shall receive an additional grant of Restricted Shares, the
number of which shall be determined as the quotient obtained by dividing (i) the
dollar amount of the portion of the Award that is payable in Elective Shares, as
computed pursuant to Paragraph 3(b) hereof, by (ii) eighty-five percent (85%) of
the Fair Market Value per Share determined as of the last day of the Plan Year,
over (y) the number of Elective Shares, computed pursuant to Paragraph 3(b)
hereof.

                           (d) Termination of Employment. Notwithstanding
Paragraphs 3(a) through 3(c) hereof, if the Grantee terminates employment prior
to the end of the Plan Year due to death, Disability, or Retirement, payment of
the entire Award, as determined pursuant to Paragraph 2(c), shall be made in the
form of a cash lump sum as soon as reasonably practicable after the close of the
Plan Year.

                  4. Restrictions on Restricted Shares. Subject to the terms and
conditions set forth herein and in the Plan, prior to the Vesting Date in
respect of Restricted Shares, Grantee shall not be permitted to sell, transfer,
pledge or assign such Restricted Shares. Share certificates evidencing
Restricted Shares shall be held in custody by the Company until the restrictions
thereon have lapsed. Concurrently herewith, Participant shall deliver to the
Company a share power, endorsed in blank, relating to the Restricted Shares
covered by the Award. During the Restricted Period, share certificates
evidencing Restricted Shares shall be held in escrow by the Company and bear a
legend in substantially the following form:

                                      -3-
<PAGE>


                  THE TRANSFERABILITY OF THIS CERTIFICATE AND THE SHARES
                  REPRESENTED HEREBY ARE SUBJECT TO THE TERMS AND
                  CONDITIONS (INCLUDING FORFEITURE) OF THE BRANDYWINE REALTY
                  TRUST 1997 LONG-TERM INCENTIVE PLAN AND AN AGREEMENT ENTERED
                  INTO BETWEEN THE REGISTERED OWNER AND BRANDYWINE REALTY TRUST.
                  COPIES OF SUCH PLAN AND AGREEMENT ARE ON FILE IN THE PRINCIPAL
                  OFFICES OF BRANDYWINE REALTY TRUST AND WILL BE MADE AVAILABLE
                  TO ANY SHAREHOLDER WITHOUT CHARGE UPON REQUEST TO THE
                  SECRETARY OF THE COMPANY.

                  5.  Lapse of Restrictions.

                           (a) Subject to the terms and conditions set forth
herein and in the Plan, the restrictions set forth in Paragraph 4 on each
Restricted Share that has not been forfeited shall lapse on the Vesting Date.

                           (b) Notwithstanding Paragraph 5(a), a Vesting Date
for all Restricted Shares subject to the Award shall occur upon the occurrence
of a Change of Control or upon the Grantee's death before the Vesting Date, and
the Restricted Shares, to the extent not previously vested, shall thereupon vest
in full.

                  6. Forfeiture of Restricted Shares. Subject to the terms and
conditions set forth herein, the Grantee may withdraw Elective Shares from the
Company's escrow at any time before the Vesting Date by providing notice to the
Committee. If the Grantee withdraws Elective Shares from the Company's escrow at
any time before the Vesting Date, the Grantee shall forfeit all of the
Restricted Shares.

                  7. Rights of Grantee. During the Restricted Period, with
respect to the Restricted Shares, Grantee shall have all of the rights of a
shareholder of the Company, including the right to vote the Restricted Shares
and the right to receive any distributions or dividends payable on Shares.

                  8. Notices. Any notice to the Company under this Award shall
be made to:

                            Brandywine Realty Trust
                            14 Campus Boulevard
                            Newtown Square, PA 19073
                            Attention:  President and Chief Executive Officer

or such other address as may be provided to Grantee by written notice. Any
notice to Grantee under this Award shall be made to Grantee at the address
listed in the Company's personnel files. All notices under this Award shall be
deemed to have been given when hand-delivered, telecopied or mailed, first class
postage prepaid, and shall be irrevocable once given.



                                       -4-


<PAGE>



                  9. Securities Laws. The Committee may from time to time impose
any conditions on the Restricted Shares as it deems necessary or advisable to
ensure that the Plan satisfies the conditions of Rule 16b-3, and that Shares are
issued and resold in compliance with the Securities Act of 1933, as amended.

                  10. Withholding. At the time of payment of the Award, the
Grantee shall pay to the Company, or make arrangements satisfactory to the
Company regarding the payment of, any Federal, state or local taxes of any kind
required by law to be withheld with respect to such amount. Unless otherwise
determined by the Board at the time of payment, the minimum required withholding
obligations may be settled with Shares, including Shares that are part of the
Award that gives rise to the withholding requirement. The obligations of the
Company under the Plan shall be conditional on such payment or arrangements and
the Company shall, to the extent permitted by law, have the right to deduct any
such taxes from any payment of any kind otherwise due to the Grantee.

                  11. Delivery of Shares. Upon a Vesting Date, the Company shall
notify Grantee (or Grantee's legal representatives, estate or heirs, in the
event of Grantee's death before a Vesting Date) that the restrictions on the
Restricted Shares have lapsed. Within ten (10) business days of a Vesting Date,
the Company shall, without payment from Grantee for the Restricted Shares,
deliver to Grantee a certificate for the Restricted Shares without any legend or
restrictions, except for such restrictions as may be imposed by the Committee,
in its sole judgment, under Paragraph 9, provided that no certificates for
Shares will be delivered to Grantee until appropriate arrangements have been
made with Employer for the withholding of any taxes which may be due with
respect to such Shares. The Company may condition delivery of certificates for
Shares upon the prior receipt from Grantee of any undertakings which it may
determine are required to assure that the certificates are being issued in
compliance with federal and state securities laws. The right to payment of any
fractional Shares shall be satisfied in cash, measured by the product of the
fractional amount times the Fair Market Value of a Share on the Vesting Date, as
determined by the Committee.

                  12. Award Not to Affect Employment. The Award granted
hereunder shall not confer upon Grantee any right to continue in the employment
of the Company or any Subsidiary.

                  13. Miscellaneous.

                           (a) The address for Grantee to which notice, demands
and other communications are to be given or delivered under or by reason of the
provisions hereof shall be the Grantee's address as reflected in the Company's
personnel records.

                                      -5-



<PAGE>



                           (b) This Award and all questions relating to its
validity, interpretation, performance and enforcement shall be governed by and
construed in accordance with the laws of Maryland.

                                BRANDYWINE REALTY TRUST



                                BY: /s/ Gerard H. Sweeney
                                    ---------------------------------
                                        Gerard H. Sweeney


                                TITLE:  President and Chief Executive Officer




                                       -6-

<PAGE>

                             BRANDYWINE REALTY TRUST
                           LONG-TERM PERFORMANCE AWARD
                           ---------------------------

         This is a Long-Term Performance Award dated December 31, 1998 (the
"Effective Date") from Brandywine Realty Trust, a Maryland real estate
investment trust (the "Company") to Gerard H. Sweeney ("Grantee"). Terms used
herein as defined terms and not defined herein have the meanings assigned to
them in the Brandywine Realty Trust 1997 Long-Term Incentive Plan, as amended
from time to time (the "Plan").

         1. Definitions. As used herein:

               (a) "Award" means the Long-Term Performance Award hereby granted.

               (b) "Board" means the Board of Trustees of the Company, as
constituted from time to time.

               (c) "Change of Control" means "Change of Control" as defined in
the Plan; provided that if the Grantee has entered into an employment agreement
with the Company that includes the term "Change of Control", then the term
"Change of Control" as used herein shall include both the definition in the Plan
and in the employment agreement.

               (d) "Code" means the Internal Revenue Code of 1986, as amended
from time to time, and any successor thereto.

               (e) "Committee" means the Committee appointed by the Board in
accordance with Section 2 of the Plan, if one is appointed and in existence at
the time of reference. If no committee has been appointed pursuant to Section 2
of the Plan, or if such a committee is not in existence at the time of
reference, "Committee" means the Board.

               (f) "Elective Shares" means the Shares described in Paragraph
3(b) hereof.

               (g) "Employer" means the Company or the Subsidiary for which
Grantee is performing services on the applicable Vesting Date.

               (h) "Mandatory Shares" means the Shares described in Paragraph
3(a) hereof.

               (i) "Plan Year" means the calendar year in which the Effective
Date occurs.

<PAGE>



               (j) "Restricted Period" means, with respect to each Restricted
Share issued upon satisfaction of the applicable performance criteria, the
period beginning on the date such Restricted Shares are issued and ending on the
Vesting Date.

               (k) "Restricted Shares" means the Shares described in Paragraph
3(c) hereof.

               (l) "Rule 16b-3" means Rule 16b-3 promulgated under the Exchange
Act, as in effect from time to time.

               (m) "Share" means a common share of beneficial interest, $.01 par
value per share, of the Company, subject to substitution or adjustment as
provided in Paragraph 3(c) of the Plan.

               (n) "Subsidiary" means, with respect to the Company or parent, a
subsidiary company, whether now or hereafter existing, as defined in section
424(f) and (g) of the Code, and any other entity 50% or more of the economic
interests in which are owned, directly or indirectly, by the Company.

               (o) "Vesting Date" means December 31, 2000.

        2.  Amount of Award.

               (a) In General. Subject to the terms and conditions set forth
herein and in the Plan, the Company hereby grants to Grantee the right to
receive an Award, the amount of which shall be a percentage of such Grantee's
base salary, based on the attainment of the performance criteria specified on
Attachment A hereto.

               (b) Condition to Payment of Award. Except as specified in
Paragraph 2(c) hereof, in order to be eligible for payment under the terms of
the Award, the Grantee must be employed by the Company or a Subsidiary on the
last day of the Plan Year.

               (c) Partial Year Employment.

                   (i) If the Grantee's employment with the Company or a
Subsidiary terminates prior to the last day of the Plan Year other than due to
death, Disability or Retirement, the Award shall be forfeited immediately upon
such termination.

                   (ii) If the Grantee's employment terminates prior to the last
day of the Plan Year due to death, Disability or Retirement, the Grantee shall
be eligible to receive a portion of the Award, determined by multiplying the
Award, as determined after the close of the Plan Year, by a fraction, the
numerator of which is the Grantee's full and partial months of employment during
the Plan Year and the denominator of which is twelve (12).


                                       -2-


<PAGE>


        3. Form and Time of Payment.

               (a) Mandatory Shares. A minimum of twenty-five percent (25%) of
the Award shall be paid in the form of Mandatory Shares, the number of which
shall be determined as the quotient obtained by dividing (x) 25% of the Award by
(y) the Fair Market Value per Share determined as of the last day of the Plan
Year. Except as otherwise provided in Paragraph 3(b), the remainder of the Award
shall be paid in the form of a cash lump sum. Both the Mandatory Shares and the
cash lump sum portions of the Award shall be issued or paid, as applicable, as
soon as reasonably practicable after the close of the Plan Year.

               (b) Elective Shares. If the Grantee so indicates on the Election
contained in Attachment B hereto, an additional percentage of the Award may be
paid in the form of Elective Shares, the number of which shall be determined as
the quotient obtained by dividing (x) the percentage of the Award elected by the
Grantee by (y) the Fair Market Value per Share determined as of the last day of
the Plan Year; provided that such Election is submitted to the Company by the
end of the Plan Year. Except as otherwise provided in Paragraph 6 hereof, until
the Vesting Date, Elective Shares shall be held by the Company in escrow.

               (c) Restricted Shares. Subject to the restrictions set forth in
Paragraph 4 hereof, if the Grantee elects to receive Elective Shares, the
Grantee shall receive an additional grant of Restricted Shares, the number of
which shall be determined as the quotient obtained by dividing (i) the dollar
amount of the portion of the Award that is payable in Elective Shares, as
computed pursuant to Paragraph 3(b) hereof, by (ii) eighty-five percent (85%) of
the Fair Market Value per Share determined as of the last day of the Plan Year,
over (y) the number of Elective Shares, computed pursuant to Paragraph 3(b)
hereof.

               (d) Termination of Employment. Notwithstanding Paragraphs 3(a)
through 3(c) hereof, if the Grantee terminates employment prior to the end of
the Plan Year due to death, Disability, or Retirement, payment of the entire
Award, as determined pursuant to Paragraph 2(c), shall be made in the form of a
cash lump sum as soon as reasonably practicable after the close of the Plan
Year.

         4. Restrictions on Restricted Shares. Subject to the terms and
conditions set forth herein and in the Plan, prior to the Vesting Date in
respect of Restricted Shares, Grantee shall not be permitted to sell, transfer,
pledge or assign such Restricted Shares. Share certificates evidencing
Restricted Shares shall be held in custody by the Company until the restrictions
thereon have lapsed. Concurrently herewith, Participant shall deliver to the
Company a share power, endorsed in blank, relating to the Restricted Shares
covered by the Award. During the Restricted Period, share certificates
evidencing Restricted Shares shall be held in escrow by the Company and bear a
legend in substantially the following form:


                                       -3-


<PAGE>

                  THE TRANSFERABILITY OF THIS CERTIFICATE AND THE SHARES
                  REPRESENTED HEREBY ARE SUBJECT TO THE TERMS AND
                  CONDITIONS (INCLUDING FORFEITURE) OF THE BRANDYWINE REALTY
                  TRUST 1997 LONG-TERM INCENTIVE PLAN AND AN AGREEMENT ENTERED
                  INTO BETWEEN THE REGISTERED OWNER AND BRANDYWINE REALTY TRUST.
                  COPIES OF SUCH PLAN AND AGREEMENT ARE ON FILE IN THE PRINCIPAL
                  OFFICES OF BRANDYWINE REALTY TRUST AND WILL BE MADE AVAILABLE
                  TO ANY SHAREHOLDER WITHOUT CHARGE UPON REQUEST TO THE
                  SECRETARY OF THE COMPANY.

        5.  Lapse of Restrictions.

              (a) Subject to the terms and conditions set forth herein and in
the Plan, the restrictions set forth in Paragraph 4 on each Restricted Share
that has not been forfeited shall lapse on the Vesting Date.

              (b) Notwithstanding Paragraph 5(a), a Vesting Date for all
Restricted Shares subject to the Award shall occur upon the occurrence of a
Change of Control or upon the Grantee's death before the Vesting Date, and the
Restricted Shares, to the extent not previously vested, shall thereupon vest in
full.

         6. Forfeiture of Restricted Shares. Subject to the terms and conditions
set forth herein, the Grantee may withdraw Elective Shares from the Company's
escrow at any time before the Vesting Date by providing notice to the Committee.
If the Grantee withdraws Elective Shares from the Company's escrow at any time
before the Vesting Date, the Grantee shall forfeit all of the Restricted Shares.

         7. Rights of Grantee. During the Restricted Period, with respect to the
Restricted Shares, Grantee shall have all of the rights of a shareholder of the
Company, including the right to vote the Restricted Shares and the right to
receive any distributions or dividends payable on Shares.

         8. Notices. Any notice to the Company under this Award shall be made
to:

                            Brandywine Realty Trust
                            14 Campus Boulevard
                            Newtown Square, PA 19073
                            Attention:  President and Chief Executive Officer

or such other address as may be provided to Grantee by written notice. Any
notice to Grantee under this Award shall be made to Grantee at the address
listed in the Company's personnel files. All notices under this Award shall be
deemed to have been given when hand-delivered, telecopied or mailed, first class
postage prepaid, and shall be irrevocable once given.



                                       -4-


<PAGE>



         9. Securities Laws. The Committee may from time to time impose any
conditions on the Restricted Shares as it deems necessary or advisable to ensure
that the Plan satisfies the conditions of Rule 16b-3, and that Shares are issued
and resold in compliance with the Securities Act of 1933, as amended.

         10. Withholding. At the time of payment of the Award, the Grantee shall
pay to the Company, or make arrangements satisfactory to the Company regarding
the payment of, any Federal, state or local taxes of any kind required by law to
be withheld with respect to such amount. Unless otherwise determined by the
Board at the time of payment, the minimum required withholding obligations may
be settled with Shares, including Shares that are part of the Award that gives
rise to the withholding requirement. The obligations of the Company under the
Plan shall be conditional on such payment or arrangements and the Company shall,
to the extent permitted by law, have the right to deduct any such taxes from any
payment of any kind otherwise due to the Grantee.

         11. Delivery of Shares. Upon a Vesting Date, the Company shall notify
Grantee (or Grantee's legal representatives, estate or heirs, in the event of
Grantee's death before a Vesting Date) that the restrictions on the Restricted
Shares have lapsed. Within ten (10) business days of a Vesting Date, the Company
shall, without payment from Grantee for the Restricted Shares, deliver to
Grantee a certificate for the Restricted Shares without any legend or
restrictions, except for such restrictions as may be imposed by the Committee,
in its sole judgment, under Paragraph 9, provided that no certificates for
Shares will be delivered to Grantee until appropriate arrangements have been
made with Employer for the withholding of any taxes which may be due with
respect to such Shares. The Company may condition delivery of certificates for
Shares upon the prior receipt from Grantee of any undertakings which it may
determine are required to assure that the certificates are being issued in
compliance with federal and state securities laws. The right to payment of any
fractional Shares shall be satisfied in cash, measured by the product of the
fractional amount times the Fair Market Value of a Share on the Vesting Date, as
determined by the Committee.

         12. Award Not to Affect Employment. The Award granted hereunder shall
not confer upon Grantee any right to continue in the employment of the Company
or any Subsidiary.

         13. Miscellaneous.

              (a) The address for Grantee to which notice, demands and other
communications are to be given or delivered under or by reason of the provisions
hereof shall be the Grantee's address as reflected in the Company's personnel
records.


                                       -5-


<PAGE>



              (b) This Award and all questions relating to its validity,
interpretation, performance and enforcement shall be governed by and construed
in accordance with the laws of Maryland.

                               BRANDYWINE REALTY TRUST



                               BY: /s/ Gerard H. Sweeney
                                   -----------------------------------
                                   Gerard H. Sweeney
                                   TITLE:  President and Chief Executive Officer


                                       -6-





<PAGE>

                             BRANDYWINE REALTY TRUST
                           LONG-TERM PERFORMANCE AWARD
                           ---------------------------


                  This is a Long-Term Performance Award dated December 31, 1998
(the "Effective Date") from Brandywine Realty Trust, a Maryland real estate
investment trust (the "Company") to John M. Adderly, Jr. ("Grantee"). Terms used
herein as defined terms and not defined herein have the meanings assigned to
them in the Brandywine Realty Trust 1997 Long-Term Incentive Plan, as amended
from time to time (the "Plan").

                  1.  Definitions.  As used herein:

                           (a) "Award" means the Long-Term Performance Award
hereby granted.

                           (b) "Board" means the Board of Trustees of the
Company, as constituted from time to time.

                           (c) "Change of Control" means "Change of Control" as
defined in the Plan; provided that if the Grantee has entered into an employment
agreement with the Company that includes the term "Change of Control", then the
term "Change of Control" as used herein shall include both the definition in the
Plan and in the employment agreement.

                           (d) "Code" means the Internal Revenue Code of 1986,
as amended from time to time, and any successor thereto.

                           (e) "Committee" means the Committee appointed by the
Board in accordance with Section 2 of the Plan, if one is appointed and in
existence at the time of reference. If no committee has been appointed pursuant
to Section 2 of the Plan, or if such a committee is not in existence at the time
of reference, "Committee" means the Board.

                           (f) "Elective Shares" means the Shares described in
Paragraph 3(b) hereof.

                           (g) "Employer" means the Company or the Subsidiary
for which Grantee is performing services on the applicable Vesting Date.

                           (h) "Mandatory Shares" means the Shares described in
Paragraph 3(a) hereof.

                           (i) "Plan Year" means the calendar year in which the
Effective Date occurs.



<PAGE>



                           (j) "Restricted Period" means, with respect to each
Restricted Share issued upon satisfaction of the applicable performance
criteria, the period beginning on the date such Restricted Shares are issued and
ending on the Vesting Date.

                           (k) "Restricted Shares" means the Shares described in
Paragraph 3(c) hereof.

                           (l) "Rule 16b-3" means Rule 16b-3 promulgated under
the Exchange Act, as in effect from time to time.

                           (m) "Share" means a common share of beneficial
interest, $.01 par value per share, of the Company, subject to substitution or
adjustment as provided in Paragraph 3(c) of the Plan.

                           (n) "Subsidiary" means, with respect to the Company
or parent, a subsidiary company, whether now or hereafter existing, as defined
in section 424(f) and (g) of the Code, and any other entity 50% or more of the
economic interests in which are owned, directly or indirectly, by the Company.

                           (o) "Vesting Date" means December 31, 2000.

                  2. Amount of Award.

                           (a) In General. Subject to the terms and conditions
set forth herein and in the Plan, the Company hereby grants to Grantee the right
to receive an Award, the amount of which shall be a percentage of such Grantee's
base salary, based on the attainment of the performance criteria specified on
Attachment A hereto.

                           (b) Condition to Payment of Award. Except as
specified in Paragraph 2(c) hereof, in order to be eligible for payment under
the terms of the Award, the Grantee must be employed by the Company or a
Subsidiary on the last day of the Plan Year.

                           (c) Partial Year Employment.

                                    (i) If the Grantee's employment with the
Company or a Subsidiary terminates prior to the last day of the Plan Year other
than due to death, Disability or Retirement, the Award shall be forfeited
immediately upon such termination.

                                    (ii) If the Grantee's employment terminates
prior to the last day of the Plan Year due to death, Disability or Retirement,
the Grantee shall be eligible to receive a portion of the Award, determined by
multiplying the Award, as determined after the close of the Plan Year, by a
fraction, the numerator of which is the Grantee's full and partial months of
employment during the Plan Year and the denominator of which is twelve (12).


                                       -2-



<PAGE>


                  3. Form and Time of Payment.

                           (a) Mandatory Shares. A minimum of twenty-five
percent (25%) of the Award shall be paid in the form of Mandatory Shares, the
number of which shall be determined as the quotient obtained by dividing (x) 25%
of the Award by (y) the Fair Market Value per Share determined as of the last
day of the Plan Year. Except as otherwise provided in Paragraph 3(b), the
remainder of the Award shall be paid in the form of a cash lump sum. Both the
Mandatory Shares and the cash lump sum portions of the Award shall be issued or
paid, as applicable, as soon as reasonably practicable after the close of the
Plan Year.

                           (b) Elective Shares. If the Grantee so indicates on
the Election contained in Attachment B hereto, an additional percentage of the
Award may be paid in the form of Elective Shares, the number of which shall be
determined as the quotient obtained by dividing (x) the percentage of the Award
elected by the Grantee by (y) the Fair Market Value per Share determined as of
the last day of the Plan Year; provided that such Election is submitted to the
Company by the end of the Plan Year. Except as otherwise provided in Paragraph 6
hereof, until the Vesting Date, Elective Shares shall be held by the Company in
escrow.

                           (c) Restricted Shares. Subject to the restrictions
set forth in Paragraph 4 hereof, if the Grantee elects to receive Elective
Shares, the Grantee shall receive an additional grant of Restricted Shares, the
number of which shall be determined as the quotient obtained by dividing (i) the
dollar amount of the portion of the Award that is payable in Elective Shares, as
computed pursuant to Paragraph 3(b) hereof, by (ii) eighty-five percent (85%) of
the Fair Market Value per Share determined as of the last day of the Plan Year,
over (y) the number of Elective Shares, computed pursuant to Paragraph 3(b)
hereof.

                           (d) Termination of Employment. Notwithstanding
Paragraphs 3(a) through 3(c) hereof, if the Grantee terminates employment prior
to the end of the Plan Year due to death, Disability, or Retirement, payment of
the entire Award, as determined pursuant to Paragraph 2(c), shall be made in the
form of a cash lump sum as soon as reasonably practicable after the close of the
Plan Year.

                  4. Restrictions on Restricted Shares. Subject to the terms and
conditions set forth herein and in the Plan, prior to the Vesting Date in
respect of Restricted Shares, Grantee shall not be permitted to sell, transfer,
pledge or assign such Restricted Shares. Share certificates evidencing
Restricted Shares shall be held in custody by the Company until the restrictions
thereon have lapsed. Concurrently herewith, Participant shall deliver to the
Company a share power, endorsed in blank, relating to the Restricted Shares
covered by the Award. During the Restricted Period, share certificates
evidencing Restricted Shares shall be held in escrow by the Company and bear a
legend in substantially the following form:

                                      -3-
<PAGE>

                  THE TRANSFERABILITY OF THIS CERTIFICATE AND THE SHARES
                  REPRESENTED HEREBY ARE SUBJECT TO THE TERMS AND
                  CONDITIONS (INCLUDING FORFEITURE) OF THE BRANDYWINE REALTY
                  TRUST 1997 LONG-TERM INCENTIVE PLAN AND AN AGREEMENT ENTERED
                  INTO BETWEEN THE REGISTERED OWNER AND BRANDYWINE REALTY TRUST.
                  COPIES OF SUCH PLAN AND AGREEMENT ARE ON FILE IN THE PRINCIPAL
                  OFFICES OF BRANDYWINE REALTY TRUST AND WILL BE MADE AVAILABLE
                  TO ANY SHAREHOLDER WITHOUT CHARGE UPON REQUEST TO THE
                  SECRETARY OF THE COMPANY.

                  5. Lapse of Restrictions.

                           (a) Subject to the terms and conditions set forth
herein and in the Plan, the restrictions set forth in Paragraph 4 on each
Restricted Share that has not been forfeited shall lapse on the Vesting Date.

                           (b) Notwithstanding Paragraph 5(a), a Vesting Date
for all Restricted Shares subject to the Award shall occur upon the occurrence
of a Change of Control or upon the Grantee's death before the Vesting Date, and
the Restricted Shares, to the extent not previously vested, shall thereupon vest
in full.

                  6. Forfeiture of Restricted Shares. Subject to the terms and
conditions set forth herein, the Grantee may withdraw Elective Shares from the
Company's escrow at any time before the Vesting Date by providing notice to the
Committee. If the Grantee withdraws Elective Shares from the Company's escrow at
any time before the Vesting Date, the Grantee shall forfeit all of the
Restricted Shares.

                  7. Rights of Grantee. During the Restricted Period, with
respect to the Restricted Shares, Grantee shall have all of the rights of a
shareholder of the Company, including the right to vote the Restricted Shares
and the right to receive any distributions or dividends payable on Shares.

                  8. Notices. Any notice to the Company under this Award shall
be made to:

                            Brandywine Realty Trust
                            14 Campus Boulevard
                            Newtown Square, PA 19073
                            Attention:  President and Chief Executive Officer

or such other address as may be provided to Grantee by written notice. Any
notice to Grantee under this Award shall be made to Grantee at the address
listed in the Company's personnel files. All notices under this Award shall be
deemed to have been given when hand-delivered, telecopied or mailed, first class
postage prepaid, and shall be irrevocable once given.



                                       -4-



<PAGE>



                  9. Securities Laws. The Committee may from time to time impose
any conditions on the Restricted Shares as it deems necessary or advisable to
ensure that the Plan satisfies the conditions of Rule 16b-3, and that Shares are
issued and resold in compliance with the Securities Act of 1933, as amended.

                  10. Withholding. At the time of payment of the Award, the
Grantee shall pay to the Company, or make arrangements satisfactory to the
Company regarding the payment of, any Federal, state or local taxes of any kind
required by law to be withheld with respect to such amount. Unless otherwise
determined by the Board at the time of payment, the minimum required withholding
obligations may be settled with Shares, including Shares that are part of the
Award that gives rise to the withholding requirement. The obligations of the
Company under the Plan shall be conditional on such payment or arrangements and
the Company shall, to the extent permitted by law, have the right to deduct any
such taxes from any payment of any kind otherwise due to the Grantee.

                  11. Delivery of Shares. Upon a Vesting Date, the Company shall
notify Grantee (or Grantee's legal representatives, estate or heirs, in the
event of Grantee's death before a Vesting Date) that the restrictions on the
Restricted Shares have lapsed. Within ten (10) business days of a Vesting Date,
the Company shall, without payment from Grantee for the Restricted Shares,
deliver to Grantee a certificate for the Restricted Shares without any legend or
restrictions, except for such restrictions as may be imposed by the Committee,
in its sole judgment, under Paragraph 9, provided that no certificates for
Shares will be delivered to Grantee until appropriate arrangements have been
made with Employer for the withholding of any taxes which may be due with
respect to such Shares. The Company may condition delivery of certificates for
Shares upon the prior receipt from Grantee of any undertakings which it may
determine are required to assure that the certificates are being issued in
compliance with federal and state securities laws. The right to payment of any
fractional Shares shall be satisfied in cash, measured by the product of the
fractional amount times the Fair Market Value of a Share on the Vesting Date, as
determined by the Committee.

                  12. Award Not to Affect Employment. The Award granted
hereunder shall not confer upon Grantee any right to continue in the employment
of the Company or any Subsidiary.

                  13.  Miscellaneous.

                           (a) The address for Grantee to which notice, demands
and other communications are to be given or delivered under or by reason of the
provisions hereof shall be the Grantee's address as reflected in the Company's
personnel records.


                                       -5-


<PAGE>



                           (b) This Award and all questions relating to its
validity, interpretation, performance and enforcement shall be governed by and
construed in accordance with the laws of Maryland.

                                 BRANDYWINE REALTY TRUST



                                 BY: /s/ Gerard H. Sweeney
                                     -----------------------------------
                                         Gerard H. Sweeney


                                 TITLE:  President and Chief Executive Officer




                                       -6-





<PAGE>

                             BRANDYWINE REALTY TRUST
                           LONG-TERM PERFORMANCE AWARD


                  This is a Long-Term Performance Award dated December 31, 1998
(the "Effective Date") from Brandywine Realty Trust, a Maryland real estate
investment trust (the "Company") to Anthony S. Rimikis ("Grantee"). Terms used
herein as defined terms and not defined herein have the meanings assigned to
them in the Brandywine Realty Trust 1997 Long-Term Incentive Plan, as amended
from time to time (the "Plan").

                  1.  Definitions.  As used herein:

                           (a) "Award" means the Long-Term Performance Award
hereby granted.

                           (b) "Board" means the Board of Trustees of the
Company, as constituted from time to time.

                           (c) "Change of Control" means "Change of Control" as
defined in the Plan; provided that if the Grantee has entered into an employment
agreement with the Company that includes the term "Change of Control", then the
term "Change of Control" as used herein shall include both the definition in the
Plan and in the employment agreement.

                           (d) "Code" means the Internal Revenue Code of 1986,
as amended from time to time, and any successor thereto.

                           (e) "Committee" means the Committee appointed by the
Board in accordance with Section 2 of the Plan, if one is appointed and in
existence at the time of reference. If no committee has been appointed pursuant
to Section 2 of the Plan, or if such a committee is not in existence at the time
of reference, "Committee" means the Board.

                           (f) "Elective Shares" means the Shares described in
Paragraph 3(b) hereof.

                           (g) "Employer" means the Company or the Subsidiary
for which Grantee is performing services on the applicable Vesting Date.

                           (h) "Mandatory Shares" means the Shares described in
Paragraph 3(a) hereof.

                           (i) "Plan Year" means the calendar year in which the
Effective Date occurs.



                                       -1-



<PAGE>



                           (j) "Restricted Period" means, with respect to each
Restricted Share issued upon satisfaction of the applicable performance
criteria, the period beginning on the date such Restricted Shares are issued and
ending on the Vesting Date.

                           (k) "Restricted Shares" means the Shares described in
Paragraph 3(c) hereof.

                           (l) "Rule 16b-3" means Rule 16b-3 promulgated under
the Exchange Act, as in effect from time to time.

                           (m) "Share" means a common share of beneficial
interest, $.01 par value per share, of the Company, subject to substitution or
adjustment as provided in Paragraph 3(c) of the Plan.

                           (n) "Subsidiary" means, with respect to the Company
or parent, a subsidiary company, whether now or hereafter existing, as defined
in section 424(f) and (g) of the Code, and any other entity 50% or more of the
economic interests in which are owned, directly or indirectly, by the Company.

                           (o) "Vesting Date" means December 31, 2000.

                  2.  Amount of Award.

                           (a) In General. Subject to the terms and conditions
set forth herein and in the Plan, the Company hereby grants to Grantee the right
to receive an Award, the amount of which shall be a percentage of such Grantee's
base salary, based on the attainment of the performance criteria specified on
Attachment A hereto.

                           (b) Condition to Payment of Award. Except as
specified in Paragraph 2(c) hereof, in order to be eligible for payment under
the terms of the Award, the Grantee must be employed by the Company or a
Subsidiary on the last day of the Plan Year.

                           (c) Partial Year Employment.

                                    (i) If the Grantee's employment with the
Company or a Subsidiary terminates prior to the last day of the Plan Year other
than due to death, Disability or Retirement, the Award shall be forfeited
immediately upon such termination.

                                    (ii) If the Grantee's employment terminates
prior to the last day of the Plan Year due to death, Disability or Retirement,
the Grantee shall be eligible to receive a portion of the Award, determined by
multiplying the Award, as determined after the close of the Plan Year, by a
fraction, the numerator of which is the Grantee's full and partial months of
employment during the Plan Year and the denominator of which is twelve (12).


                                       -2-



<PAGE>



                  3. Form and Time of Payment.

                           (a) Mandatory Shares. A minimum of twenty-five
percent (25%) of the Award shall be paid in the form of Mandatory Shares, the
number of which shall be determined as the quotient obtained by dividing (x) 25%
of the Award by (y) the Fair Market Value per Share determined as of the last
day of the Plan Year. Except as otherwise provided in Paragraph 3(b), the
remainder of the Award shall be paid in the form of a cash lump sum. Both the
Mandatory Shares and the cash lump sum portions of the Award shall be issued or
paid, as applicable, as soon as reasonably practicable after the close of the
Plan Year.

                           (b) Elective Shares. If the Grantee so indicates on
the Election contained in Attachment B hereto, an additional percentage of the
Award may be paid in the form of Elective Shares, the number of which shall be
determined as the quotient obtained by dividing (x) the percentage of the Award
elected by the Grantee by (y) the Fair Market Value per Share determined as of
the last day of the Plan Year; provided that such Election is submitted to the
Company by the end of the Plan Year. Except as otherwise provided in Paragraph 6
hereof, until the Vesting Date, Elective Shares shall be held by the Company in
escrow.

                           (c) Restricted Shares. Subject to the restrictions
set forth in Paragraph 4 hereof, if the Grantee elects to receive Elective
Shares, the Grantee shall receive an additional grant of Restricted Shares, the
number of which shall be determined as the quotient obtained by dividing (i) the
dollar amount of the portion of the Award that is payable in Elective Shares, as
computed pursuant to Paragraph 3(b) hereof, by (ii) eighty-five percent (85%) of
the Fair Market Value per Share determined as of the last day of the Plan Year,
over (y) the number of Elective Shares, computed pursuant to Paragraph 3(b)
hereof.

                           (d) Termination of Employment. Notwithstanding
Paragraphs 3(a) through 3(c) hereof, if the Grantee terminates employment prior
to the end of the Plan Year due to death, Disability, or Retirement, payment of
the entire Award, as determined pursuant to Paragraph 2(c), shall be made in the
form of a cash lump sum as soon as reasonably practicable after the close of the
Plan Year.

                  4. Restrictions on Restricted Shares. Subject to the terms and
conditions set forth herein and in the Plan, prior to the Vesting Date in
respect of Restricted Shares, Grantee shall not be permitted to sell, transfer,
pledge or assign such Restricted Shares. Share certificates evidencing
Restricted Shares shall be held in custody by the Company until the restrictions
thereon have lapsed. Concurrently herewith, Participant shall deliver to the
Company a share power, endorsed in blank, relating to the Restricted Shares
covered by the Award. During the Restricted Period, share certificates
evidencing Restricted Shares shall be held in escrow by the Company and bear a
legend in substantially the following form:



                                       -3-


<PAGE>

             THE TRANSFERABILITY OF THIS CERTIFICATE AND THE SHARES
                 REPRESENTED HEREBY ARE SUBJECT TO THE TERMS AND


                  CONDITIONS (INCLUDING FORFEITURE) OF THE BRANDYWINE REALTY
                  TRUST 1997 LONG-TERM INCENTIVE PLAN AND AN AGREEMENT ENTERED
                  INTO BETWEEN THE REGISTERED OWNER AND BRANDYWINE REALTY TRUST.
                  COPIES OF SUCH PLAN AND AGREEMENT ARE ON FILE IN THE PRINCIPAL
                  OFFICES OF BRANDYWINE REALTY TRUST AND WILL BE MADE AVAILABLE
                  TO ANY SHAREHOLDER WITHOUT CHARGE UPON REQUEST TO THE
                  SECRETARY OF THE COMPANY.

                  5.  Lapse of Restrictions.

                           (a) Subject to the terms and conditions set forth
herein and in the Plan, the restrictions set forth in Paragraph 4 on each
Restricted Share that has not been forfeited shall lapse on the Vesting Date.

                           (b) Notwithstanding Paragraph 5(a), a Vesting Date
for all Restricted Shares subject to the Award shall occur upon the occurrence
of a Change of Control or upon the Grantee's death before the Vesting Date, and
the Restricted Shares, to the extent not previously vested, shall thereupon vest
in full.

                  6. Forfeiture of Restricted Shares. Subject to the terms and
conditions set forth herein, the Grantee may withdraw Elective Shares from the
Company's escrow at any time before the Vesting Date by providing notice to the
Committee. If the Grantee withdraws Elective Shares from the Company's escrow at
any time before the Vesting Date, the Grantee shall forfeit all of the
Restricted Shares.

                  7. Rights of Grantee. During the Restricted Period, with
respect to the Restricted Shares, Grantee shall have all of the rights of a
shareholder of the Company, including the right to vote the Restricted Shares
and the right to receive any distributions or dividends payable on Shares.

                           8. Notices. Any notice to the Company under this
Award shall be made to:

                            Brandywine Realty Trust
                            14 Campus Boulevard
                            Newtown Square, PA 19073
                            Attention:  President and Chief Executive Officer

or such other address as may be provided to Grantee by written notice. Any
notice to Grantee under this Award shall be made to Grantee at the address
listed in the Company's personnel files. All notices under this Award shall be
deemed to have been given when hand-delivered, telecopied or mailed, first class
postage prepaid, and shall be irrevocable once given.



                                       -4-



<PAGE>



                  9. Securities Laws. The Committee may from time to time impose
any conditions on the Restricted Shares as it deems necessary or advisable to
ensure that the Plan satisfies the conditions of Rule 16b-3, and that Shares are
issued and resold in compliance with the Securities Act of 1933, as amended.

                  10. Withholding. At the time of payment of the Award, the
Grantee shall pay to the Company, or make arrangements satisfactory to the
Company regarding the payment of, any Federal, state or local taxes of any kind
required by law to be withheld with respect to such amount. Unless otherwise
determined by the Board at the time of payment, the minimum required withholding
obligations may be settled with Shares, including Shares that are part of the
Award that gives rise to the withholding requirement. The obligations of the
Company under the Plan shall be conditional on such payment or arrangements and
the Company shall, to the extent permitted by law, have the right to deduct any
such taxes from any payment of any kind otherwise due to the Grantee.

                  11. Delivery of Shares. Upon a Vesting Date, the Company shall
notify Grantee (or Grantee's legal representatives, estate or heirs, in the
event of Grantee's death before a Vesting Date) that the restrictions on the
Restricted Shares have lapsed. Within ten (10) business days of a Vesting Date,
the Company shall, without payment from Grantee for the Restricted Shares,
deliver to Grantee a certificate for the Restricted Shares without any legend or
restrictions, except for such restrictions as may be imposed by the Committee,
in its sole judgment, under Paragraph 9, provided that no certificates for
Shares will be delivered to Grantee until appropriate arrangements have been
made with Employer for the withholding of any taxes which may be due with
respect to such Shares. The Company may condition delivery of certificates for
Shares upon the prior receipt from Grantee of any undertakings which it may
determine are required to assure that the certificates are being issued in
compliance with federal and state securities laws. The right to payment of any
fractional Shares shall be satisfied in cash, measured by the product of the
fractional amount times the Fair Market Value of a Share on the Vesting Date, as
determined by the Committee.

                  12. Award Not to Affect Employment. The Award granted
hereunder shall not confer upon Grantee any right to continue in the employment
of the Company or any Subsidiary.

                  13.  Miscellaneous.

                           (a) The address for Grantee to which notice, demands
and other communications are to be given or delivered under or by reason of the
provisions hereof shall be the Grantee's address as reflected in the Company's
personnel records.


                                       -5-



<PAGE>



                           (b) This Award and all questions relating to its
validity, interpretation, performance and enforcement shall be governed by and
construed in accordance with the laws of Maryland.

                                                 BRANDYWINE REALTY TRUST



                                              BY: /s/ Gerard H. Sweeney
                                                  --------------------------
                                                  Gerard H. Sweeney


                                   TITLE:  President and Chief Executive Officer



                                       -6-




<PAGE>

                                   AGREEMENT

         THIS AGREEMENT is entered into as of the 19th day of January, 1999 by
and between Jeff F. Rogatz ("Executive") and Brandywine Realty Trust (the
"Company").

         WHEREAS, Executive is currently employed by the Company and/or a
Subsidiary (as defined below) of the Company;

         WHEREAS, in order to encourage Executive to remain an employee of the
Company and/or a Subsidiary, the Company is entering into this Agreement with
Executive.

         NOW, THEREFORE, the parties hereto, intending to be legally bound,
hereby agree as follows:

         1. Payment Obligation. The Company agrees that if (i) a Change of
Control (as defined below) of the Company occurs at a time when Executive is
then an employee of the Company and/or a Subsidiary of the Company and (ii)
within one year of the occurrence of the Change of Control either (a) the
Company or the purchaser or successor thereto (the "Purchaser") terminates the
employment of Executive other than for Cause (as defined below) or (b) Executive
resigns for Good Reason (as defined below), then the Company or Purchaser will
be obligated to continue to pay to Executive an amount equal to his base salary
as in effect at the time of the Change of Control for a period expiring 547 days
after the effective date of Executive's termination of employment.

         2. No Right to Employment. This Agreement shall not confer upon
Executive any right to remain an employee of the Company or a Subsidiary of the
Company, and shall only entitle Executive to the salary continuation payments in
the limited circumstances set forth in Paragraph 1 above.

         3. Certain Definitions. As used herein: (i) the terms "Change of
Control" and "Subsidiary" shall have the respective meanings assigned to them in
the Company's 1997 Long-Term Incentive Plan, as amended (the "Plan"), (ii) the
term "Cause" shall have the meaning assigned to it in the Plan (except that
references in such Plan definition to "Company" shall be interpreted to mean the
Company or Purchaser, as applicable) and (iii) the term "Good Reason" shall mean
any of (a) a reduction in Executive's base salary as in effect at the time of
the Change of Control, (b) a significant adverse alteration in the nature or
status of Executive's responsibilities from those in effect at the time of the
Change of Control or (c) relocation of the place where Executive performs his
day-to-day responsibilities at the time of the Change of Control by more than 30
miles.

         4. Tax Withholding, etc. All compensation payable under this Agreement
shall be subject to customary withholding taxes and other employment taxes as

<PAGE>

required with respect to compensation paid by an employer to an employee and the
amount of compensation payable hereunder shall be reduced appropriately to
reflect the amount of any required witholding. The Company shall have no
obligation to make any payments to the Executive or make the Executive whole for
the amount of any required taxes.

         5. "Gross-Up Payment." If Executive is employed by the Company or a
Subsidiary at the time of a Change of Control and Executive's employment by the
Company or a Subsidiary is terminated under circumstances that entitle Executive
to a payment described in Paragraph 1 of this Agreement, the Company shall pay
Executive the Gross-Up Payment, computed as provided in this Paragraph 5.

            a. For purposes of this Agreement, the term "Gross-Up Payment" means
an amount such that the net amount retained by Executive, after deduction of
the excise tax imposed under section 4999 of the Internal Revenue Code of 1986,
as amended (the "Code") or any successor provision of law ("Excise Tax"), if
any, on the "Total Payments" (as hereinafter defined) and any federal state and
local income tax, employment tax and Excise Tax upon the payment provided for by
this Section 5, shall be equal to the excess of the Total Payments (including
the payment provided for in this Section 5) over the payment provided for by
this Section 5.

            b. For purposes of determining whether any of the Total Payments
will be subject to Excise Tax and the amount of such Excise Tax.

               (1) any payments or benefits received or to be received by
Executive in connection with a Change of Control or Executive's termination of
employment (whether pursuant to the terms of this Agreement or any other plan,
arrangement or agreement with the Company or a Subsidiary, any person whose
actions result in a Change of Control or any person affiliated with the Company
or such person (the "Total Payments")) shall be treated as "parachute payments"
(within the meaning of section 280G(b)(2) of the Code) unless, in the opinion of
a tax advisor selected by the Company's independent auditors and reasonably
acceptable to Executive, such payments or benefits (in whole or in part) do not
constitute parachute payments, including by reason of section 280G(b)(4)(A) of
the Code, and all "excess parachute payments" (within the meaning of section
280G(b)(1) of the Code) shall be treated as subject to Excise Tax unless, in the
opinion of such tax counsel, such excess parachute payments (in whole or in
part) represent reasonable compensation for services actually rendered (within
the meaning of section 280G(b)(4)(B) of the Code), or are otherwise not subject
to Excise Tax; and

               (2) the value of any  noncash benefits or deferred payment or 
benefit shall be determined by the Company's independent auditors in accordance
with the principles of sections 280G(d)(3) and (4) of the Code. For purposes of
determining the amount of the Gross-Up Payment, Executive shall be deemed to pay
federal income tax at the highest marginal rate of federal income taxation in

                                      -2-
<PAGE>

the calendar year in which the Gross-Up Payment is to be made and state and 
local income taxes at the highest marginal rate of taxation in the state and
locality of Executive's residence on the date of Executive's termination of
employment (or such other time as is hereinafter described), net of the maximum
reduction in federal income taxes which could be obtained from the deduction of
such state and local taxes.

            c. Notwithstanding the foregoing, if the Excise Tax is subsequently
determined to be less than the amount taken into account hereunder at the time
of termination of Executive's employment, Executive shall repay to the Company,
at the time that the amount of such reduction in Excise Tax is finally
determined, the portion of the Gross-Up Payment attributable to such reduction
(plus that portion of the Gross-Up Payment attributable to the Excise Tax and
federal, state and local income tax imposed on the Gross-Up Payment being repaid
by Executive to the extent that such repayment results in a reduction in Excise
Tax or a federal, state or local income tax deduction), plus interest on the
amount of such repayment at the rate provided in section 1274(b)(2)(B) of the
Code. If the Excise Tax is subsequently determined to exceed the amount taken
into account hereunder at the time of termination of Executive's employment
(including by reason of any payment the existence or amount of which cannot be
determined at the time of the Gross-Up Payment), the Company shall make an
additional Gross-Up Payment in respect of such excess (plus any interest,
penalties or additions payable by Executive with respect to such excess) at the
time that the amount of such excess is finally determined. Executive and the
Company shall each reasonably cooperate with the other in connection with any
administrative or judicial proceedings concerning the existence or amount of
liability for Excise Tax with respect to the Total Payments. Such additional
payment shall be made within 30 days following the date Executive notifies the
Company that he is subject to the Excise Tax.

            d. The Company shall promptly pay in advance or reimburse Executive
for all reasonable legal fees and expenses incurred in good faith by Executive
in connection with any tax audit or proceeding to the extent attributable to the
application of section 4999 of the Code to any payment or benefit provided
hereunder.

         6. Miscellaneous.

            a. Controlling Law. This Agreement, and all questions relating to
its validity, interpretation, performance and enforcement, shall be governed by
and construed in accordance with the laws of the Commonwealth of Pennsylvania.

            b. Entire Agreement. This Agreement contains the entire
understanding among the parties hereto with respect to the subject matter hereof
and supersedes all prior agreements and understandings, inducements or
conditions, express or implied, oral or written, except as herein contained.

                                      -3-
<PAGE>

This Agreement may not be modified or amended other than by an agreement in
writing.

            c. Liability of Trustees, etc. No recourse shall be had for any
obligation of the Company hereunder, or for any claim based thereon or otherwise
in respect thereof, against any past, present or future trustee, shareholder,
officer or employee of the Company, whether by virtue of any statute or rule of
law, or by the enforcement of any assessment or penalty or otherwise, all such
liability being expressly waived and released by Executive.

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the day and year first above written.


                      BRANDYWINE REALTY TRUST

                                       By: /s/ Gerald H. Sweeney
                                       -----------------------------------------
                                           President and Chief Executive Officer

                                           /s/ Jeff F. Rogatz
                                       -----------------------------------------
                                           Jeff F. Rogatz



                                   
                                      -4-

<PAGE>
                                   AGREEMENT

         THIS AGREEMENT is entered into as of the 4th day of January, 1999 by
and between John M. Adderly, Jr. ("Executive") and Brandywine Realty Trust (the
"Company").

         WHEREAS, Executive is currently employed by the Company and/or a
Subsidiary (as defined below) of the Company;

         WHEREAS, in order to encourage Executive to remain an employee of the
Company and/or a Subsidiary, the Company is entering into this Agreement with
Executive.

         NOW, THEREFORE, the parties hereto, intending to be legally bound,
hereby agree as follows:

         1. Payment Obligation. The Company agrees that if (i) a Change of
Control (as defined below) of the Company occurs at a time when Executive is
then an employee of the Company and/or a Subsidiary of the Company and (ii)
within one year of the occurrence of the Change of Control either (a) the
Company or the purchaser or successor thereto (the "Purchaser") terminates the
employment of Executive other than for Cause (as defined below) or (b) Executive
resigns for Good Reason (as defined below), then the Company or Purchaser will
be obligated to continue to pay to Executive an amount equal to his base salary
as in effect at the time of the Change of Control for a period expiring 547 days
after the effective date of Executive's termination of employment.

         2. No Right to Employment. This Agreement shall not confer upon
Executive any right to remain an employee of the Company or a Subsidiary of the
Company, and shall only entitle Executive to the salary continuation payments in
the limited circumstances set forth in Paragraph 1 above.

         3. Certain Definitions. As used herein: (i) the terms "Change of
Control" and "Subsidiary" shall have the respective meanings assigned to them in
the Company's 1997 Long-Term Incentive Plan, as amended (the "Plan"), (ii) the
term "Cause" shall have the meaning assigned to it in the Plan (except that
references in such Plan definition to "Company" shall be interpreted to mean the
Company or Purchaser, as applicable) and (iii) the term "Good Reason" shall mean
any of (a) a reduction in Executive's base salary as in effect at the time of
the Change of Control, (b) a significant adverse alteration in the nature or
status of Executive's responsibilities from those in effect at the time of the
Change of Control or (c) relocation of the place where Executive performs his
day-to-day responsibilities at the time of the Change of Control by more than 30
miles.

         4. Tax Withholding, etc. All compensation payable under this Agreement
shall be subject to customary withholding taxes and other employment taxes as

<PAGE>

required with respect to compensation paid by an employer to an employee and the
amount of compensation payable hereunder shall be reduced appropriately to
reflect the amount of any required witholding. The Company shall have no
obligation to make any payments to the Executive or make the Executive whole for
the amount of any required taxes.

         5. "Gross-Up Payment." If Executive is employed by the Company or a
Subsidiary at the time of a Change of Control and Executive's employment by the
Company or a Subsidiary is terminated under circumstances that entitle Executive
to a payment described in Paragraph 1 of this Agreement, the Company shall pay
Executive the Gross-Up Payment, computed as provided in this Paragraph 5.

            a. For purposes of this Agreement, the term "Gross-Up Payment" means
an amount such that the net amount retained by Executive, after deduction of
the excise tax imposed under section 4999 of the Internal Revenue Code of 1986,
as amended (the "Code") or any successor provision of law ("Excise Tax"), if
any, on the "Total Payments" (as hereinafter defined) and any federal state and
local income tax, employment tax and Excise Tax upon the payment provided for by
this Section 5, shall be equal to the excess of the Total Payments (including
the payment provided for in this Section 5) over the payment provided for by
this Section 5.

            b. For purposes of determining whether any of the Total Payments
will be subject to Excise Tax and the amount of such Excise Tax.

               (1) any payments or benefits received or to be received by
Executive in connection with a Change of Control or Executive's termination of
employment (whether pursuant to the terms of this Agreement or any other plan,
arrangement or agreement with the Company or a Subsidiary, any person whose
actions result in a Change of Control or any person affiliated with the Company
or such person (the "Total Payments")) shall be treated as "parachute payments"
(within the meaning of section 280G(b)(2) of the Code) unless, in the opinion of
a tax advisor selected by the Company's independent auditors and reasonably
acceptable to Executive, such payments or benefits (in whole or in part) do not
constitute parachute payments, including by reason of section 280G(b)(4)(A) of
the Code, and all "excess parachute payments" (within the meaning of section
280G(b)(1) of the Code) shall be treated as subject to Excise Tax unless, in the
opinion of such tax counsel, such excess parachute payments (in whole or in
part) represent reasonable compensation for services actually rendered (within
the meaning of section 280G(b)(4)(B) of the Code), or are otherwise not subject
to Excise Tax; and

               (2) the value of any  noncash benefits or deferred payment or 
benefit shall be determined by the Company's independent auditors in accordance
with the principles of sections 280G(d)(3) and (4) of the Code. For purposes of
determining the amount of the Gross-Up Payment, Executive shall be deemed to pay
federal income tax at the highest marginal rate of federal income taxation in

                                      -2-
<PAGE>

the calendar year in which the Gross-Up Payment is to be made and state and
local income taxes at the highest marginal rate of taxation in the state and
locality of Executive's residence on the date of Executive's termination of
employment (or such other time as is hereinafter described), net of the maximum
reduction in federal income taxes which could be obtained from the deduction of
such state and local taxes.

            c. Notwithstanding the foregoing, if the Excise Tax is subsequently
determined to be less than the amount taken into account hereunder at the time
of termination of Executive's employment, Executive shall repay to the Company,
at the time that the amount of such reduction in Excise Tax is finally
determined, the portion of the Gross-Up Payment attributable to such reduction
(plus that portion of the Gross-Up Payment attributable to the Excise Tax and
federal, state and local income tax imposed on the Gross-Up Payment being repaid
by Executive to the extent that such repayment results in a reduction in Excise
Tax or a federal, state or local income tax deduction), plus interest on the
amount of such repayment at the rate provided in section 1274(b)(2)(B) of the
Code. If the Excise Tax is subsequently determined to exceed the amount taken
into account hereunder at the time of termination of Executive's employment
(including by reason of any payment the existence or amount of which cannot be
determined at the time of the Gross-Up Payment), the Company shall make an
additional Gross-Up Payment in respect of such excess (plus any interest,
penalties or additions payable by Executive with respect to such excess) at the
time that the amount of such excess is finally determined. Executive and the
Company shall each reasonably cooperate with the other in connection with any
administrative or judicial proceedings concerning the existence or amount of
liability for Excise Tax with respect to the Total Payments. Such additional
payment shall be made within 30 days following the date Executive notifies the
Company that he is subject to the Excise Tax.

            d. The Company shall promptly pay in advance or reimburse Executive
for all reasonable legal fees and expenses incurred in good faith by Executive
in connection with any tax audit or proceeding to the extent attributable to the
application of section 4999 of the Code to any payment or benefit provided
hereunder.

         6. Miscellaneous.

            a. Controlling Law. This Agreement, and all questions relating to
its validity, interpretation, performance and enforcement, shall be governed by
and construed in accordance with the laws of the Commonwealth of Pennsylvania.

            b. Entire Agreement. This Agreement contains the entire
understanding among the parties hereto with respect to the subject matter hereof
and supersedes all prior agreements and understandings, inducements or
conditions, express or implied, oral or written, except as herein contained.

                                      -3-
<PAGE>

This Agreement may not be modified or amended other than by an agreement in
writing.

            c. Liability of Trustees, etc. No recourse shall be had for any
obligation of the Company hereunder, or for any claim based thereon or otherwise
in respect thereof, against any past, present or future trustee, shareholder,
officer or employee of the Company, whether by virtue of any statute or rule of
law, or by the enforcement of any assessment or penalty or otherwise, all such
liability being expressly waived and released by Executive.

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the day and year first above written.


                                       BRANDYWINE REALTY TRUST

                                       By: /s/ Gerald H. Sweeney
                                       -----------------------------------------
                                           President and Chief Executive Officer

                                           /s/ John M. Adderly, Jr.
                                       -----------------------------------------
                                           John M. Adderly, Jr.


                                      -4-

<PAGE>
                                   AGREEMENT

         THIS AGREEMENT is entered into as of the 4th day of January, 1999 by
and between Anthony S. Rimikis ("Executive") and Brandywine Realty Trust (the
"Company").

         WHEREAS, Executive is currently employed by the Company and/or a
Subsidiary (as defined below) of the Company;

         WHEREAS, in order to encourage Executive to remain an employee of the
Company and/or a Subsidiary, the Company is entering into this Agreement with
Executive.

         NOW, THEREFORE, the parties hereto, intending to be legally bound,
hereby agree as follows:

         1. Payment Obligation. The Company agrees that if (i) a Change of
Control (as defined below) of the Company occurs at a time when Executive is
then an employee of the Company and/or a Subsidiary of the Company and (ii)
within one year of the occurrence of the Change of Control either (a) the
Company or the purchaser or successor thereto (the "Purchaser") terminates the
employment of Executive other than for Cause (as defined below) or (b) Executive
resigns for Good Reason (as defined below), then the Company or Purchaser will
be obligated to continue to pay to Executive an amount equal to this base salary
as in effect at the time of the Change of Control for a period expiring on the
first anniversary of the effective date of Executive's termination of
employment.

         2. No Right to Employment. This Agreement shall not confer upon
Executive any right to remain an employee of the Company or a Subsidiary of the
Company, and shall only entitle Executive to the salary continuation payments in
the limited circumstances set forth in Paragraph 1 above.

         3. Certain Definitions. as used herein: (i) the terms "Change of
Control" and "Subsidiary" shall have the respective meanings assigned to them in
the Company's 1997 Long-Term Incentive Plan, as amended (the "Plan"), (ii) the
term "Cause" shall have the meaning assigned to it in the Plan (except that
references in such Plan definition to "Company" shall be interpreted to mean the
Company or Purchaser, as applicable) and (iii) the term "Good Reason" shall mean
any of (a) a reduction in Executive's base salary as in effect at the time of
the Change of Control, (b) a significant adverse alteration in the nature or
status of Executive's responsibilities from those in effect at the time of the
Change of Control or (c) relocation of the place where Executive performs his
day-to-day responsibilities at the time of the Change of Control by more than 30
miles.

         4. Tax Withholding, etc. All compensation payable under this Agreement
shall be subject to customary withholding taxes and other employment taxes as
required with respect to compensation paid by an employer to an employee and the
amount of compensation payable hereunder shall be reduced appropriately to
reflect the amount of any required witholding. The Company shall have no

<PAGE>

obligation to make any payments to the Executive or make the Executive whole for
the amount of any required taxes.

         5. Miscellaneous.

            a. Controlling Law. This Agreement, and all questions relating to
its validity, interpretation, performance and enforcement, shall be governed by
and construed in accordance with the laws of the Commonwealth of Pennsylvania.

            b. Entire Agreement. This Agreement contains the entire
understanding among the parties hereto with respect to the subject matter hereof
and supersedes all prior agreements and understandings, inducements or
conditions, express or implied, oral or written, except as herein contained.
This Agreement may not be modified or amended other than by an agreement in
writing.

            c. Liability of Trustees, etc. No recourse shall be had for any
obligation of the Company hereunder, or for any claim based thereon or otherwise
in respect thereof, against any past, present of future trustee, shareholder,
officer or employee of the Company, whether by virtue of any statute or rule of
law, or by the enforcement of any assessment or penalty or otherwise, all such
liability being expressly waived and released by Executive.

            IN WITNESS WHEREOF, the parties hereto have executed this Agreement
as of the day and year first above written.

                               BRANDYWINE REALTY TRUST


                               By: /s/ Gerald H. Sweeney
                                   -----------------------------------------
                                       President and Chief Executive Officer

                                   /s/ Anthony S. Rimikis
                                   -----------------------------------------
                                       Anthony S. Rimikis


                                      -2-



<PAGE>

                                  EXHIBIT 21.1
                                  ------------


AAPOP 1, L.P., a Delaware limited partnership 
AAPOP 2, L.P., a Delaware limited partnership 
AAPOP 3, L.P., a Delaware limited partnership 
AAPOP Umbrella, L.P., a Delaware limited partnership 
Brandywine Berwyn SPE, L.P. 
Brandywine Dominion, L.P., a Pennsylvania limited partnership 
Brandywine F.C., L.P., a Pennsylvania limited partnership 
Brandywine Grande B, L.P., a Delaware limited partnership
Brandywine I.S., L.P., a Pennsylvania limited partnership 
Brandywine Norriton, L.P., a Pennsylvania limited partnership 
Brandywine Operating Partnership, L.P., a Delaware limited partnership 
Brandywine P.M., L.P., a Pennsylvania limited partnership 
Brandywine Realty Partners, a Pennsylvania general partnership
Brandywine TB I, L.P., a Pennsylvania limited partnership 
Brandywine TB II, L.P., a Pennsylvania limited partnership 
Brandywine TB III, L.P., a Pennsylvania limited partnership 
Brandywine TB VI, L.P., a Pennsylvania limited partnership
C/N Iron Run Limited Partnership III, a Pennsylvania limited partnership 
C/N Leedom Limited Partnership II, a Pennsylvania limited partnership 
C/N Oaklands Limited Partnership I, a Pennsylvania limited partnership 
C/N Oaklands Limited Partnership III, a Pennsylvania limited partnership 
Fifteen Horsham, L.P., a Pennsylvania limited partnership 
Iron Run Limited Partnership V, a Pennsylvania limited partnership 
LC/N Horsham Limited Partnership, a Pennsylvania limited partnership 
LC/N Keith Valley Limited Partnership I, a Pennsylvania limited partnership 
Newtech III Limited Partnership, a Pennsylvania limited partnership
Newtech IV Limited Partnership, a Pennsylvania limited partnership 
Nichols Lansdale Limited Partnership III, a Pennsylvania limited partnership 
Witmer Operating Partnership I, L.P., a Delaware limited partnership 
Brandywine Central, L.P., a Pennsylvania limited partnership 
Brandywine 3 Paragon Drive Partnership, a New York general partnership 
Brandywine 55 Ames Court Partnership, a New York general partnership 
Brandywine Engineers Lane Partnership, a New York general partnership 
Brandywine National Road Partnership, a New York general partnership 
Brandywine Phillips Parkway Partnership, a New Jersey general partnership 
Brandywine Broad Street Partnership, a New York general partnership 
Brandywine Axinn Avenue Partnership, a New York general partnership 
Brandywine Durham Partnership, a New Jersey general partnership 
Interstate Center Associates, a Virginia general partnership
Iron Run Venture I, a Pennsylvania general partnership 
IR Northlight II Associates, a Pennsylvania general partnership 
Iron Run Venture II, a Pennsylvania general partnership

<PAGE>

 
AAP Sub One, Inc., a Delaware corporation
AAP Sub Two, Inc., a Delaware corporation
AAP Sub Three, Inc., a Delaware corporation
AAP Sub Four, Inc., a Delaware corporation
Atlantic American Land Development, Inc., a Delaware corporation 
AAP 1-49, Inc., 49 separate Delaware corporations 
Atlantic American Properties Management II, Inc., a Delaware corporation 
Brandywine Grande B Corp., a Delaware corporation
Brandywine Holdings, I, Inc., a Pennsylvania corporation 
Brandywine Holdings II, Inc., a Pennsylvania corporation 
Brandywine Holdings III, Inc., a Pennsylvania corporation 
Brandywine Realty Services Corporation, a Pennsylvania corporation
Brandywine SPE Corp., a Pennsylvania corporation 
1100 Brandywine, LLC, a Delaware limited liability company 
Brandywine Acquisitions, LLC, a Delaware limited liability company 
Brandywine Axinn I, LLC, a Delaware limited liability company 
Brandywine Axinn II, LLC, a Delaware limited liability company
Brandywine Berwyn SPE, L.L.C. 
Brandywine Chestnut Ridge, L.L.C., a New Jersey limited liability company 
Brandywine Dabney, L.L.C., a Delaware limited liability company 
Brandywine Dominion, L.L.C., a Pennsylvania limited liability company 
Brandywine F.C., L.L.C., a Pennsylvania limited liability company
Brandywine I.S., L.L.C., a Pennsylvania limited liability company 
Brandywine Interstate 50, L.L.C., a Delaware limited liability company 
Brandywine Leasing, LLC, a Delaware limited liability company 
Brandywine - Main Street, LLC, a Delaware limited liability company 
Brandywine Norriton, L.L.C., a Pennsylvania limited liability company 
Brandywine P.M., L.L.C., a Pennsylvania limited liability company 
Brandywine Piazza, L.L.C., a New Jersey limited liability company 
Brandywine Plaza 1000, L.L.C., a New Jersey limited liability company
Brandywine Promenade, L.L.C., a New Jersey limited liability company 
Brandywine TB I, L.L.C., a Pennsylvania limited liability company 
Brandywine TB II, L.L.C., a Pennsylvania limited liability company 
Brandywine TB III, L.L.C., a Pennsylvania limited liability company 
Brandywine TB VI, L.L.C., a Pennsylvania limited liability company 
Brandywine Trenton Urban Renewal, L.L.C., a Delaware limited liability company 
Brandywine Tysons, L.L.C., a Delaware limited liability company 
Brandywine Witmer, L.L.C., a Pennsylvania limited liability company 
1000 Chesterbrook Boulevard Partnership, a Pennsylvania general partnership 
Christiana Center Operating Company I, LLC, a Delaware limited liability company
Christiana Center Operating Company II, LLC, a Delaware limited liability 
  company 
Two Tower Bridge Associates, a Pennsylvania limited partnership 
Four Tower Bridge Associates, a Pennsylvania limited partnership

                                      -2-

<PAGE>


Five Tower Bridge Associates, a Pennsylvania limited partnership 
Six Tower Bridge Associates, a Pennsylvania limited partnership 
Interstate 202 General Partnership, a Pennsylvania general partnership 
Plymouth Meeting General Partnership, a Pennsylvania general partnership 
Atlantic American Properties Trust, a Maryland real estate investment trust



                                       -3-


<PAGE>

                                                                    Exhibit 23.1

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation of our
report dated March 2, 1999 (except with respect to the matter discussed in Note
15 to the consolidated financial statements as to which the date is March 26,
1999) included in this Form 10-K, into the Company's previously filed
Registration Statements on Forms S-3 (File No. 333-20999, File No. 333-46647,
File No. 333-56237 and File No. 333-69653) and Forms S-8 (File No. 333-14243 and
File No. 333-28427).


                                                  /s/ ARTHUR ANDERSEN LLP

Philadelphia, Pennsylvania
  March 31, 1999

<TABLE> <S> <C>

<ARTICLE> 5
<CIK> 0000790816
<NAME> BRANDYWINE REALTY TRUST
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             DEC-31-1997
<PERIOD-END>                               DEC-31-1998
<CASH>                                          13,075
<SECURITIES>                                         0
<RECEIVABLES>                                   10,769
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                27,333
<PP&E>                                       1,908,095
<DEPRECIATION>                                  67,477
<TOTAL-ASSETS>                               1,911,680
<CURRENT-LIABILITIES>                           40,268
<BONDS>                                      1,000,560
                                0
                                     37,500
<COMMON>                                           376
<OTHER-SE>                                     705,778
<TOTAL-LIABILITY-AND-EQUITY>                 1,911,680
<SALES>                                              0
<TOTAL-REVENUES>                               192,861
<CGS>                                                0
<TOTAL-COSTS>                                  155,833
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              36,886
<INCOME-PRETAX>                                 33,025
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                (2,003)
<CHANGES>                                            0
<NET-INCOME>                                    33,025
<EPS-PRIMARY>                                     0.90
<EPS-DILUTED>                                     0.89
        

</TABLE>


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