HRPT PROPERTIES TRUST
S-3, 1999-09-03
REAL ESTATE INVESTMENT TRUSTS
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                                                  Registration No. 333-

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                             -----------------------

                                    FORM S-3

             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                             -----------------------

                              HRPT PROPERTIES TRUST

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

           Maryland                                          04-6558834
(State or other jurisdiction                              (I.R.S. Employer
of incorporation or organization)                      Identification Number)

                                400 Centre Street
                           Newton, Massachusetts 02458
                                 (617) 332-3990
    (Address, including zip code, and telephone number, including area code,
                  of registrant's principal executive offices)
                              ---------------------
                           David J. Hegarty, President
                              HRPT Properties Trust
                                400 Centre Street
                           Newton, Massachusetts 02458
                                 (617) 332-3990
              (Name, address, including zip code, telephone number,
                   including area code, of agent for service)
                              ---------------------
                                    Copy to:
                       Alexander A. Notopoulos, Jr., Esq.
                            Sullivan & Worcester LLP
                             One Post Office Square
                           Boston, Massachusetts 02109
                                 (617) 338-2800
                              ---------------------

         Approximate  date of commencement of proposed sale to the public:  From
time  to  time or at one  time  after  the  effective  date of the  Registration
Statement as determined by the selling  shareholders.  All of the shares offered
hereby are for the respective accounts of the selling shareholders.
         If the only securities  being registered on this Form are being offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. |_|
         If any of the  securities  being  registered  on  this  Form  are to be
offered  on a  delayed  or  continuous  basis  pursuant  to Rule 415  under  the
Securities Act of 1933,  other than  securities  offered only in connection with
dividend or interest reinvestment plans, check the following box. |X|
         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. |_| _____________
         If this  Form is a  post-effective  amendment  filed  pursuant  to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act  registration   statement  number  of  the  earlier  effective  registration
statement for the same offering. |_| _____________
         If delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following box. |_|
                             -----------------------
<TABLE>
<CAPTION>
                                                   CALCULATION OF REGISTRATION FEE
                                                                                Proposed           Proposed
                                                                                Maximum            Maximum
    Title of Each Class of Securities to be             Amount to            Offering Price        Aggregate           Amount of
                   Registered                         be Registered             Per Unit        Offering Price     Registration Fee
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                    <C>                     <C>               <C>                <C>
Common Shares of Beneficial Interest, par
value $.01 per share ...........................        1,224,074               $13.50(1)         $16,524,999         $789.72(2)
<FN>
     (1) Estimated  pursuant to Rule 457(c) solely for purposes of  calculation of the  registration  fee on the basis of the $13.50
average of the high and low sales prices for the Common Shares on the New York Stock Exchange on September 1, 1999.

     (2) Pursuant to Rule 429(a) of the rules and regulations under the Securities Act of 1933, as amended, the Prospectus contained
herein also relates to 1,013,650 Common Shares included in the Company's Registration Statement on Form S-3 (File No. 33-62135). The
aggregate amount of the filing fees associated with such securities that was previously paid with such  registration  statement with
respect to such Common Shares was $5,243.02.
</FN>
</TABLE>
         The Registrant hereby amends this  Registration  Statement on such date
or dates as may be necessary to delay its  effective  date until the  Registrant
shall file a further amendment which specifically  states that this Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the Securities  Act of 1933 or until this  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.
<PAGE>
The  information in this  prospectus is not complete and may be changed.  We may
not sell  these  securities  until the  registration  statement  filed  with the
Securities and Exchange Commission is effective. This prospectus is not an offer
to  sell  these  securities  and it is not  soliciting  an  offer  to buy  these
securities in any state where the offer or sale is not permitted.

                              Subject to Completion
                 Preliminary prospectus dated September 3, 1999
Prospectus

                                1,224,074 Shares

                              HRPT Properties Trust

                      Common Shares of Beneficial Interest

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

Selling Shareholders

   o The  selling  shareholders  do not have any present  intention  to sell any
     shares. This prospectus relates to the reoffer and resale of shares by HRPT
     Advisors,  Inc.,  a  Delaware  corporation,  Gerard M.  Martin and Barry M.
     Portnoy,  the  selling  shareholders,  for their own  account.  We will not
     receive any of the proceeds from the reoffering and resale of the shares.

   o Depending  upon  the  selling  shareholders'  continuing  review  of  their
     respective  investments and various other facts,  the selling  shareholders
     may, subject to any applicable securities laws, sell all or any part of the
     offered shares.

   o We have not filed the registration statement of which this prospectus forms
     a part because of any present intention of the selling shareholders to sell
     any of the  offered  shares.  Rather,  the selling  shareholders  intend to
     pledge all or a part of the  offered  shares they hold to one or more banks
     or  brokerage  houses as  collateral  for loans to them.  In the event of a
     default  under a loan to a  selling  shareholder  which is  secured  by the
     pledge of offered shares,  the lender will have the right to cause the sale
     of the offered  shares under the  registration  statement  relating to this
     prospectus.

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

         Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if this
prospectus  is truthful or  complete.  Any  representation  to the contrary is a
criminal offense.

         Our shares are traded on the New York Stock  Exchange  under the symbol
"HRP." On September 1, 1999,  the last sale price for the shares on the NYSE was
$13.3125.

         Our  principal  place  of  business  is  400  Centre  Street,   Newton,
Massachusetts 02458 and our telephone number is (617) 332-3990.


               The date of this prospectus is _____________, 1999.
<PAGE>

                                TABLE OF CONTENTS

                                                                           Page

The Company..............................................................     3

Use of Proceeds..........................................................     3

Selling Shareholders.....................................................     3

Description of Shares....................................................     4

Limitation of Liability; Shareholder Liability...........................     6

Restrictions on Transfer of Shares; Business Combinations
   and Control Share Acquisitions........................................     7

Plan of Distribution.....................................................    12

Legal Matters............................................................    13

Experts..................................................................    13

About This Prospectus....................................................    14

Incorporation of Documents by Reference..................................    14

Where You Can Find More Information......................................    15

Forward Looking Statements...............................................    15



                                        2

<PAGE>

                                   THE COMPANY

         HRPT Properties Trust is a real estate  investment  trust, a REIT, that
acquires, owns and leases office buildings and senior housing properties.  As of
August 20, 1999, we owned a total of 265 properties located in 36 states and the
District of  Columbia.  References  in this  prospectus  to "we," "us," "our" or
"HRPT" mean HRPT Properties Trust and its  subsidiaries.  We have a total market
capitalization  of $3.1  billion,  including  $1.8  billion  of  equity.  We are
organized as a Maryland  real estate  investment  trust.

         We recently announced a plan to separate our office properties from our
senior housing real estate by spinning off our  subsidiary  which owns 93 senior
housing  properties.  Under that plan, we would  distribute to our  shareholders
13.2 million of the 26 million shares of that subsidiary. The spin-off, which is
described  in more  detail in our current  reports  filed with the SEC which are
incorporated  into this  prospectus by reference,  constitutes  one  alternative
transaction that we are considering with respect to financing our senior housing
real estate investments.  The plan is contingent,  and there can be no assurance
that we will complete it or that we will  separately  finance our senior housing
properties at all.

                                 USE OF PROCEEDS

         We will receive no proceeds from the sale of the shares  offered by the
selling shareholders. The selling shareholders will receive all proceeds.

                              SELLING SHAREHOLDERS

         The  selling   shareholders   are  HRPT  Advisors,   Inc.,  a  Delaware
corporation,  Gerard M. Martin and Barry M.  Portnoy.  Prior to the  offering of
shares  described  in  this  prospectus,  the  selling  shareholders  owned  the
following shares:
<TABLE>
<CAPTION>

                                                                     Maximum Number                   Percentage of
                                      Shares Owned                      of Shares                  Outstanding Shares
Selling Shareholder                 Prior to Offering                 Being Offered                 Prior to Offering
- -------------------                 -----------------                 -------------                 -----------------
<S>                                  <C>                               <C>                               <C>
HRPT Advisors, Inc.                   1,134,372(1)                      1,134,372                         0.86%

Gerard M. Martin                        44,851(2)                        44,851                           0.03%

Barry M. Portnoy                        44,851(2)                        44,851                           0.03%

- ---------------
<FN>
(1)  HRPT Advisors, Inc. is wholly owned by Messrs. Martin and Portnoy.

(2)  Messrs. Martin and Portnoy each own 44,851 shares directly.  In addition,  solely in its capacity as successor
     voting trustee of a voting trust  agreement,  Reit Management & Research,  Inc., which is also wholly owned by
     Messrs. Martin and Portnoy and is our investment advisor, exercises voting control over 1,000,000 shares which
     are owned by AMS  Properties,  Inc.  and are  pledged to us to secure the  obligations  of Mariner  Post-Acute
     Network,  Inc. and its affiliates to us. Reit  Management & Research,  Inc. also  exercises  voting control as
     proxy over 1,463,366  shares owned by Mr. John F. Chapple,  III. These  additional  2,463,366 shares represent
     1.87% of the outstanding shares.
</FN>
</TABLE>

                                        3
<PAGE>
         The selling  shareholders  are  offering  the shares  described in this
prospectus.  From  time  to  time,  depending  upon  the  selling  shareholders'
continuing  review of their respective  investments and various other facts, the
selling shareholders may, subject to any applicable securities laws, sell all or
any part of the shares offered by this  prospectus.  However,  we have not filed
the registration  statement of which this prospectus forms a part because of any
present intention of the selling shareholders to sell any of the offered shares.
Rather,  we filed the  registration  statement to  facilitate  the pledge by the
selling shareholders of all or a part of the offered shares to one or more banks
or brokerage houses as collateral for loans to the selling shareholders. Because
we are  registering  the offered shares to facilitate the pledge of those shares
and because this offering is not being  underwritten on a firm commitment basis,
we cannot give an estimate as to the number or  percentage  of shares  which the
selling   shareholders  will  own  upon  termination  of  this  offering.   More
information  about the possible  distribution  of the offered shares is given in
"Plan of Distribution" below.

         Until January 1, 1998,  HRPT  Advisors,  Inc.  acted as our  investment
advisor. Our Managing Trustees,  Gerard M. Martin and Barry M. Portnoy, own HRPT
Advisors, Inc. Messrs. Martin, Portnoy and David J. Hegarty, our President,  are
the  directors of HRPT  Advisors,  Inc.  and Messrs.  Martin and Hegarty are the
President  and Treasurer of HRPT  Advisors,  Inc.  Since  January 1, 1998,  Reit
Management & Research, Inc. has been our investment advisor.  Messrs. Martin and
Portnoy own Reit Management & Research, Inc. Messrs. Martin, Portnoy and Hegarty
are the  directors  of Reit  Management  &  Research,  Inc.  Mr.  Hegarty is the
President of Reit Management & Research, Inc.

                              DESCRIPTION OF SHARES

         Authorized Capital.  Our declaration of trust authorizes our company to
issue an aggregate of 200,000,000 shares of beneficial  interest,  including (i)
150,000,000  common  shares,  par  value  $.01 per  share,  and (ii)  50,000,000
preferred shares, par value $.01 per share. Our declaration of trust permits our
board of trustees to amend the  declaration of trust to increase or decrease the
authorized  shares of  beneficial  interest of our company  without  shareholder
approval.

         Preferred  Shares.  Our  declaration of trust  authorizes the trustees,
without shareholder  approval,  from time to time to divide the preferred shares
into  classes or series  and to set or  change,  if the class or series has been
previously established, the par value, if any, preferences,  conversion or other
rights, voting powers, restrictions, limitations as to dividends, qualifications
or terms  and  conditions  of  redemption  of the  preferred  shares  as are not
prohibited by our declaration of trust or applicable law. In connection with the
adoption of our shareholders rights plan, the trustees established an authorized
but unissued  class of  1,500,000  preferred  shares,  par value $.01 per share,
called the "junior  participating  preferred  shares." The junior  participating
preferred  shares are  described  more fully below.  As of August 20, 1999,  the
trustees had established no other class or series of preferred shares.

         Outstanding  Shares.  As of August 20,  1999,  there  were  131,907,626
shares outstanding,  all of which were common shares. We also had outstanding as
of such date approximately  $205 million aggregate  principal amount convertible
subordinated  debentures of various series,  all of

                                        4
<PAGE>
which are convertible into common shares at an exercise price equal on such date
to $18 per share.

         Characteristics  of All  Shares.  The  following  descriptions  are not
complete and are subject to, and  qualified in their  entirety by reference  to,
the more complete descriptions set forth in our declaration of trust.

         Except as  otherwise  determined  by the  trustees  with respect to any
class or series of preferred shares, all shares:

         o        will participate  equally in dividends payable to shareholders
                  when, as and if declared by the trustees and will  participate
                  ratably  in  net  assets   available   for   distribution   to
                  shareholders on liquidation or dissolution;

         o        will have one vote per  share on all  matters  submitted  to a
                  vote of the shareholders;

         o        will not have  cumulative  voting  rights in the  election  of
                  trustees; and

         o        will have no preference,  conversion,  exchange, sinking fund,
                  redemption rights or preemptive or similar rights.

         Upon  issuance  in  accordance   with  the  declaration  of  trust  and
applicable  law, the shares  offered by this  prospectus  will be fully paid and
nonassessable.  The holders of shares do not have preemptive rights with respect
to the issuance of additional shares or other of our securities.

         We may, at the sole  discretion of our trustees,  issue the  authorized
but unissued shares from time to time for any proper trust purpose,  which could
include  raising  capital,  providing  compensation or benefits to employees and
others,  paying  distributions in shares or acquiring  companies,  businesses or
properties.  The issuance of additional shares could have the effect of diluting
the earnings per share and book value per share of currently outstanding shares.

Junior Participating Preferred Shares

         General.  In connection  with the adoption of our  shareholders  rights
plan,  the  trustees  authorized  a  class  of  1,500,000  junior  participating
preferred shares. The powers, preferences and rights and certain qualifications,
limitations and restrictions of the junior participating  preferred shares, when
and if issued,  are described  below.  The statements  below with respect to the
junior participating  preferred shares are not necessarily complete.  You should
read the  applicable  provisions  of our  declaration  of trust,  including  the
applicable articles  supplementary for a more complete description of the junior
participating preferred shares.

         Dividends.  The holder of each junior  participating  preferred  share,
when and if issued, is entitled to quarterly  dividends in the greater amount of
$5.00 or 100 times the quarterly per share dividend,  whether cash or otherwise,
declared upon the common shares. Dividends on the junior participating preferred
shares are cumulative.  Whenever dividends on the junior participating preferred
shares are in arrears,  we are prohibited  from  declaring or paying  dividends,
making
                                        5
<PAGE>

other  distributions  on, or redeeming or  repurchasing  common  shares or other
shares ranking junior to the junior  participating  preferred shares. If we fail
to pay dividends on the junior participating  preferred shares for six quarters,
the  holders of the junior  participating  preferred  shares will be entitled to
elect two trustees.

         Voting. The holder of each junior  participating  preferred share, when
and if issued,  is entitled to 100 votes on all matters  submitted  to a vote of
the  shareholders,  voting  together with holders of common shares as one class,
unless the declaration of trust otherwise provide.

         Liquidation  Preference.  If we  liquidate,  dissolve  or wind up,  the
holders of junior  participating  preferred shares are entitled to a liquidation
preference of $100 per share plus the amount of any accrued and unpaid dividends
and distributions on the junior participating preferred shares, prior to payment
of any  distribution in respect of the common shares or any other shares ranking
junior to the junior  participating  preferred shares.  Following payment of the
liquidation preference, the holders of junior participating preferred shares are
not entitled to further distributions until the holders of common shares receive
an  amount  per  share  (the  "Common  Share  Adjustment")  equal to the  junior
participating  preferred shares liquidation  preference divided by 100, adjusted
to reflect events such as share splits,  share  dividends and  recapitalizations
affecting the common shares (the "Adjustment Number").  Following the payment of
the  full  amount  of the  junior  participating  preferred  shares  liquidation
preference  and the Common  Share  Adjustment,  holders of junior  participating
preferred  shares are  entitled to  participate  proportionately  on a per share
basis with holders of common shares in the  distribution of the remaining assets
to be distributed in respect of shares in the ratio of the Adjustment  Number to
one. The powers,  preferences and rights of the junior  participating  preferred
shares are subject to the superior powers,  preferences and rights of any senior
series or class of preferred  shares which the trustees  authorize  for issuance
from time to time.

         More Information.  For more information with respect to the shares, see
"Limitation of Liability;  Shareholder  Liability" and "Restrictions on Transfer
of Shares; Business Combinations and Control Share Acquisitions" below.

Transfer Agent and Registrar

         The Transfer  Agent and  Registrar  for our shares is State Street Bank
and Trust Company,  c/o Boston EquiServe,  P.O. Box 8200, Boston,  Massachusetts
02266-8200, telephone number (800) 426-5523.

                 LIMITATION OF LIABILITY; SHAREHOLDER LIABILITY

         Maryland law permits a REIT to provide,  and our  declaration  of trust
provides, that no trustee, officer, shareholder, employee or agent of HRPT shall
be held to any personal liability,  jointly or severally,  for any obligation of
or claim against HRPT, and that, as far as practicable,  each written  agreement
of HRPT is to contain a provision  to that  effect.  Despite  these  facts,  our
lawyers have advised us that in some  jurisdictions the possibility  exists that
shareholders of a non-corporate  entity such as HRPT may be held liable for acts
or  obligations of HRPT. Our lawyers have advised us that the State of Texas may
not give effect to the limitation of
                                        6
<PAGE>

shareholder  liability afforded by Maryland law, but that Texas law would likely
recognize contractual limitations of liability such as those discussed above. We
intend to conduct  our  business  in a manner  designed  to  minimize  potential
shareholder liability by, among other things,  inserting appropriate  provisions
in our written  agreements;  however,  we cannot give any assurance that you can
avoid liability in all instances in all jurisdictions.

         Our  declaration  of trust  provides  that,  upon payment by you of any
liability of the kind described above,  you will be entitled to  indemnification
by us. We cannot give any assurance that, at the time any liability of this type
arises,  we  will  have  assets   sufficient  to  satisfy  our   indemnification
obligation.  The trustees intend to conduct our  operations,  with the advice of
legal  counsel,  in a  manner  designated  to  minimize  or  avoid,  as  far  as
practicable,  the ultimate  liability of our  shareholders.  The trustees do not
intend to provide insurance covering these risks to the shareholders.

            RESTRICTIONS ON TRANSFER OF SHARES; BUSINESS COMBINATIONS
                         AND CONTROL SHARE ACQUISITIONS

Restrictions on Transfer of Shares and Business Combinations

         Restrictions  on Transfer of Shares.  For us to qualify as a REIT under
the Internal Revenue Code of 1986, as amended, in any taxable year not more than
50% in value of our outstanding shares may be owned, directly or indirectly,  by
five or fewer individuals  during the last six months of that year. In addition,
the shares  must be owned by 100 or more  persons  during at least 335 days of a
taxable year or a proportionate  part of a taxable year less than 12 months.  In
order to meet  these  and other  requirements,  the  trustees  have the power to
redeem or prohibit the transfer of a sufficient  number of shares to maintain or
bring the ownership of the shares into conformity with these tax requirements.

         In connection  with the foregoing,  if the trustees are at any time and
in good  faith of the  opinion  that  direct  or  indirect  ownership  of shares
representing more than 8.5% in value of the total shares  outstanding has or may
become  concentrated  in the  hands  of one  beneficial  owner,  other  than the
excepted  persons  described in our declaration of trust,  the trustees have the
power (1) to authorize the purchase of those excess shares from any shareholder,
and (2) to require us to refuse to transfer or issue  shares to any person whose
acquisition of those shares would, in the opinion of the trustees, result in the
direct or indirect  beneficial  ownership  by any person of shares  representing
more than 8.5% in value of the outstanding shares.

         Any transfer of shares,  options or other  securities  convertible into
shares that would create a beneficial  owner,  other than those excepted persons
described in our declaration of trust, of shares  representing more than 8.5% in
value of the total shares  outstanding  will be deemed void from the  beginning,
and the intended  transferee will be deemed never to have had an interest in the
shares  which  the  transferee  sought to  acquire  in the  voided  transaction.
Furthermore,  our  declaration  of trust  provides  that  transfers or purported
acquisitions,  directly,  indirectly or by attribution,  of shares or securities
convertible into shares that could result in our  disqualification as a REIT are
void, and permits the trustees to repurchase  shares or other  securities to the
extent necessary to maintain our status as a REIT.

                                        7
<PAGE>

         If the trustees  decide to authorize the  repurchase of excess  shares,
the  purchase  price  will be  determined  by the  price  of the  shares  on the
principal  exchange on which they are then traded. If no public trading price is
available, then the purchase price will be equal to the net asset value of those
shares as determined by the trustees in accordance with applicable law. From and
after the date fixed for purchase by the trustees, and so long as payment of the
purchase price for the shares to be so redeemed is made or is duly provided for,
the holder of any excess  shares  called for purchase by the trustees will cease
to be entitled to  distributions,  voting rights and any and all other  benefits
with respect to those shares,  except the right to payment of the purchase price
for the shares.

         Business  Combinations  with Related Persons.  Our declaration of trust
also requires that the business  combinations  described in the  declaration  of
trust  between  us and a  beneficial  holder  of 10% or more of the  outstanding
shares, a so-called "related person," be approved by the affirmative vote of the
holders of at least 75% of the shares unless (1) the trustees by unanimous  vote
or  written  consent  expressly  approved  in  advance  the  acquisition  of the
outstanding  shares that caused the related person to become a related person or
approved the business  combination  prior to the related person  involved in the
business  combination  having  become  a  related  person,  or (2) the  business
combination is solely between us and a 100% owned  affiliate of us. As permitted
by law,  we have  elected to be  governed  by these  provisions  rather than the
provisions of Subtitle 6 of Title 3 of the Corporations and Associations Article
of the Annotated Code of Maryland regarding business combinations.

         Staggered Board. Under our declaration of trust, the number of trustees
may be fixed from time to time by  two-thirds of the trustees or by an amendment
of the declaration by our shareholders, with a minimum of three and a maximum of
twelve trustees, a majority of whom must be independent  trustees, as defined in
the  declaration of trust.  The declaration of trust fixes our current number of
trustees at five and divides the trustees  into three  groups.  Trustees in each
group  are  elected  to  three-year   terms.  As  the  trustees'  terms  expire,
replacements are elected by holders of a majority of the outstanding shares. The
classified   nature  of  the  trustees  may  make  it  more  difficult  for  our
shareholders  to remove a majority of our  trustees  than if all  trustees  were
elected  on an  annual  basis.  Vacancies  may be filled  by a  majority  of the
remaining trustees, except that a vacancy among the independent trustees must be
filled by a majority of the remaining independent trustees or by a majority vote
of our  shareholders.  Any trustee may be removed for cause by all the remaining
trustees,  or without cause by vote of two-thirds of the shares then outstanding
and entitled to vote on the removal.

         Repeal or Amendment. The provisions regarding business combinations and
the  classified  nature of the  trustees  and various  other  matters may not be
repealed or amended  without the affirmative  vote of  shareholders  entitled to
cast at least  75% of all the votes  entitled  to be cast on the  matter.  Other
amendments  requiring  shareholder  approval must be approved by the affirmative
vote of  shareholders  entitled  to cast at least a  majority  of all the  votes
entitled  to be cast on the matter.  The  trustees,  by  two-thirds  vote,  may,
without the approval or consent of the  shareholders,  adopt any amendment  that
they in good faith  determine  to be necessary to permit us to qualify as a REIT
under the Internal Revenue Code.

                                        8

<PAGE>

         Possible  Anti-Takeover  Effect. The foregoing  provisions may have the
effect of  discouraging  unilateral  tender offers or other  takeover  proposals
which some  shareholders  might deem in their  interests or in  connection  with
which  they  might  receive  a  substantial  premium  for  their  shares.  These
provisions could also have the effect of insulating  current  management against
the possibility of removal and could deprive  shareholders of  opportunities  to
sell at a  temporarily  higher  market  price  by  possibly  reducing  temporary
fluctuations in market price caused by  accumulations  of shares.  However,  the
trustees  believe that inclusion of these provisions in our declaration of trust
may help assure fair treatment of shareholders and preserve our assets.

Control Share Acquisitions

         Maryland law provides for a limitation  of voting  rights in a "control
share  acquisition." The Maryland statute defines a control share acquisition as
the  acquisition  of shares which would entitle the acquiror to exercise 20%, 33
1/3% or 50% of the voting  power,  and  requires a  two-thirds  vote,  excluding
shares owned by the acquiring person and by an officer or by a trustee who is an
employee of the trust,  to accord voting rights to shares  acquired in a control
share  acquisition.  The statute  requires the target  company to hold a special
meeting of  shareholders  at the request of an actual or proposed  control share
acquiror subject to compliance with various conditions by the acquiror.

         In  addition,  unless  the  declaration  of  trust  or  bylaws  provide
otherwise, the statute gives us, within set time limitations, various redemption
rights  if there is a  shareholder  vote on the  issue  and the  grant of voting
rights is not approved,  or if an "acquiring  person statement" is not delivered
to the target  company  within 10 days  following a control  share  acquisition.
Moreover,  unless the  declaration  of trust or bylaws  provide  otherwise,  the
statute  provides  that if, before a control share  acquisition  occurs,  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,
then all other shareholders may exercise appraisal rights. The fair value of the
shares as determined for purposes of these appraisal rights may not be less than
the  highest  price  per  share  paid  by  the  acquiror  in the  control  share
acquisition.  The  statute  does  not  apply to  shares  acquired  in a  merger,
consolidation or share exchange if the company is a party to the transaction. An
acquisition  of shares may be exempted from the control  share statute  provided
that a declaration of trust or bylaw provision is adopted for this purpose prior
to the control share acquisition. There is no exception from these provisions in
our declaration of trust or bylaws.

Rights Plan

         General.  In October 1994,  the trustees  adopted a shareholder  rights
plan. The  shareholder  rights plan provides for the  distribution of one junior
participating  preferred share purchase right for each common share.  Each right
entitles the holder to buy 1/100th of a junior  participating  preferred  share,
or, in some  circumstances,  to receive cash,  property,  common shares or other
securities  of  ours,  at an  exercise  price  of $50 per  1/100th  of a  junior
participating preferred share.

                                        9

<PAGE>

         Distribution Date. Initially,  the junior participating preferred share
purchase  rights are attached to  certificates  evidencing  common  shares.  The
junior  participating  preferred  share  purchase  rights will separate from the
common shares and a so-called "distribution date" will occur upon earlier of the
following:

         o        10 business  days,  or on a later date that the  trustees  may
                  determine  before a  distribution  date  occurs,  following  a
                  public announcement by us that a person or group of affiliated
                  or associated persons has acquired,  or has obtained the right
                  to  acquire,  beneficial  ownership  of  10%  or  more  of the
                  outstanding common shares; or

         o        10 business  days,  or on a later date that the  trustees  may
                  determine  before a  distribution  date occurs,  following the
                  commencement  of a tender  offer or exchange  offer that would
                  result in a person becoming an acquiring person.

         Prior to the Distribution Date.  Until the distribution date:

         o        the junior participating  preferred share purchase rights will
                  be evidenced by the certificates for common shares and will be
                  transferred with and only with the common share certificates;

         o        common   share    certificates   will   contain   a   notation
                  incorporating  by reference the rights  agreement  under which
                  the junior participating  preferred share purchase rights were
                  issued; and

         o        the surrender for transfer of any certificates for outstanding
                  common shares will also  constitute the transfer of the junior
                  participating  preferred share purchase rights associated with
                  the common shares evidenced by the certificates.

         Exercise  and  Expiration.  The junior  participating  preferred  share
purchase rights are not exercisable  until the distribution date and will expire
at the close of  business  on October  17,  2004,  unless  earlier  redeemed  or
exchanged by us as described below.  Until a right is exercised,  the holder has
no rights as a shareholder, including without limitation the right to vote or to
receive dividends.

         Flip-In  Event.  In the event a person  becomes a so-called  "acquiring
person" by acquiring or obtaining the right to acquire  beneficial  ownership of
10% or more of our  outstanding  common  shares,  each  holder  of a right  will
thereafter have the right to receive, upon exercise of the right, common shares,
or, in certain circumstances, cash, property or other securities of ours, having
a current market price equal to two times the exercise price of the right.  This
type of event is known as a "flip-in event." A flip-in event does not occur when
a person  becomes an acquiring  person in  connection  with a tender or exchange
offer for all outstanding common shares at a price and on terms which a majority
of our  outside  trustees  determines  to be fair to and  otherwise  in the best
interests  of HRPT and its  shareholders.  An offer  which  is  approved  by the
outside trustees in this manner is known as a "fair offer."  Notwithstanding the
foregoing,   following  the  occurrence  of  any  flip-in   event,   all  junior
participating  preferred share purchase

                                       10
<PAGE>
rights that are, or in the circumstances  specified in the junior  participating
preferred  share  purchase  rights  agreement  were,  beneficially  owned by any
acquiring  person or by related  parties will be void in the  circumstances  set
forth in the junior  participating  preferred share purchase  rights  agreement.
However,  junior  participating  preferred  share  purchase  rights  will not be
exercisable following the occurrence of any flip-in event until such time as the
junior participating preferred share purchase rights are no longer redeemable by
us as set forth below.

         Flip-Over  Event.  In the event that, at any time on or after the share
acquisition  date,  (1) we take part in a merger or other  business  combination
transaction,  other than various  mergers that follow a fair offer,  and HRPT is
not the  surviving  entity,  (2) HRPT takes  part in a merger or other  business
combination  transaction  in which the common  shares are changed or  exchanged,
other than some types of mergers that follow a fair offer, or (3) 50% or more of
our  assets or earning  power is sold or  transferred,  each  holder of a right,
except junior  participating  preferred share purchase  rights which  previously
have been voided, as set forth above,  thereafter has the right to receive, upon
exercise,  a number of shares of common stock of the acquiring  company having a
current market price equal to two times the exercise price of the right.

         Purchase  Price.  The purchase  price  payable and the number of junior
participating  preferred  shares,  or the  amount  of  cash,  property  or other
securities  issuable upon exercise of the junior  participating  preferred share
purchase rights are subject to adjustment from time to time to prevent  dilution
in the following circumstances:

         o        in  the  event  of a  share  dividend  on,  or a  subdivision,
                  combination or reclassification  of, the junior  participating
                  preferred shares;

         o        if holders of the junior  participating  preferred  shares are
                  granted  various  rights or warrants to  subscribe  for junior
                  participating  preferred  shares or convertible  securities at
                  less than the current market price of the junior participating
                  preferred shares; or

         o        upon the  distribution to holders of the junior  participating
                  preferred  shares of  evidences  of  indebtedness  or  assets,
                  excluding  regular quarterly cash dividends or of subscription
                  rights or warrants other than those referred to above.

Subject to various  exceptions,  no  adjustment  in the  purchase  price will be
required  until  cumulative  adjustments  amount to at least 1% of the  purchase
price. We are not required to issue  fractional  shares upon the exercise of any
right, and we will make a cash payment in lieu of any fractional shares.

         Redemption.  At any time until 10  business  days  following  the share
acquisition  date,  we may  redeem  the  junior  participating  preferred  share
purchase  rights  in  whole,  but not in part,  at a price  of $.01  per  right,
payable,  at our option,  in cash,  common shares or other  consideration as the
trustees may determine.  Immediately upon the effectiveness of the action of the
trustees  ordering  redemption  of  the  junior  participating  preferred  share
purchase rights, the junior  participating  preferred share purchase rights will
terminate  and the only right of the holders of

                                       11
<PAGE>
junior participating preferred share purchase rights will be to receive the $.01
per right redemption price.

         Amendment.  Prior to the distribution  date, the trustees may amend the
terms of the junior  participating  preferred share purchase rights,  other than
key  financial  terms and the date on which the junior  participating  preferred
share purchase rights expire.  Thereafter, the trustees may amend the provisions
of the junior  participating  preferred share purchase rights  agreement only in
order to cure any ambiguity,  defect or inconsistency,  to make changes which do
not adversely affect the interests of holders of junior participating  preferred
share purchase rights, excluding the interests of any acquiring person and other
related  parties,  or to shorten or lengthen  any time  period  under the junior
participating preferred share purchase rights agreement; provided, however, that
no amendment to lengthen the time period governing  redemption is permitted when
the junior participating preferred share purchase rights are not redeemable.

                              PLAN OF DISTRIBUTION

         We will not receive any proceeds  from the sale of the offered  shares.
Depending upon the selling  shareholders'  continuing review of their respective
investments and various other facts,  the selling  shareholders  may, subject to
any  applicable  securities  laws,  sell all or any part of the offered  shares.
However,  we have not filed the registration  statement of which this prospectus
forms a part  because of any present  intention of the selling  shareholders  to
sell any of the  offered  shares.  Rather,  the selling  shareholders  intend to
pledge all or a part of the offered  shares held by them to one or more banks or
brokerage  houses as collateral  for loans to the selling  shareholders.  In the
event of a default under a loan to a selling shareholder which is secured by the
pledge of offered  shares,  the lender  will have the right to cause the sale of
the offered  shares under the  registration  statement of which this  prospectus
forms a part.

         One or more  selling  shareholders,  at the  direction  of a lender  or
otherwise, or any lender may sell offered shares from time to time to purchasers
directly. Alternatively, one or more selling shareholders, at the direction of a
lender or  otherwise,  or any  lender  may from time to time  offer the  offered
shares through  underwriters,  dealers or agents who may receive compensation in
the form of underwriting discounts,  concessions or commissions from the selling
shareholders  and/or the  purchasers of offered  shares for whom they may act as
agent.  The selling  shareholders  and any  underwriters,  dealers or agents who
participate  in the  distribution  of the  offered  shares  may be  deemed to be
underwriters,  and any profits on the sale of the offered shares by them and any
discounts,  commissions or concessions received by any underwriters,  dealers or
agents might be deemed to be underwriting  discounts and  commissions  under the
Securities Act of 1933, as amended.

         To  the  extent  the   selling   shareholders   may  be  deemed  to  be
underwriters,  the  selling  shareholders  may be subject  to certain  statutory
liabilities of the Securities Act of 1933, as amended, including but not limited
to,  Sections  11, 12 and 17 of that act and Rule  10b-5  under  the  Securities
Exchange  Act of  1934,  as  amended.  At  any  time a  selling  shareholder  or
underwriter   makes  a  particular  offer  of  the  offered  shares  under  this
prospectus,  if required, the selling shareholder or underwriter will distribute
a prospectus  supplement  that will identify the aggregate  amount of the shares
being offered and the terms of the offering,  including the name or

                                       12
<PAGE>
names of any  underwriters,  dealers or agents,  any discounts,  commissions and
other items  constituting  compensation  from the selling  shareholders  and any
discounts,  commissions or concessions  allowed or reallowed or paid to dealers.
We will file the  prospectus  supplement  and, if  necessary,  a  post-effective
amendment to the registration  statement of which this prospectus is a part with
the SEC to reflect the disclosure of additional  information with respect to the
distribution of the offered shares.

         The  offered  shares  may be  sold  from  time  to  time in one or more
transactions  at a fixed  offering  price,  which may be changed,  or at varying
prices  determined  at the time of sale or at  negotiated  prices.  The  offered
shares may be sold in transactions in which this prospectus is delivered or, for
selling  shareholders who are not underwriters and who are not affiliates of us,
in which  this  prospectus  is not  delivered.  The  selling  shareholders  will
determine those prices,  or those prices will be determined by agreement between
the selling shareholders and underwriters or dealers.

         The  selling  shareholders  and any  other  person  participating  in a
distribution may be subject to applicable provisions of the Exchange Act and the
rules and regulations  thereunder,  including  without  limitation  Rules 10b-3,
10b-6 or 10b-7,  which provisions may limit the timing or purchases and sales of
any of the offered shares by the selling shareholders and any other such person.
Furthermore,  under Rule 10b-6 under the Exchange Act, to the extent applicable,
any  person   engaged  in  a   distribution   of  the  offered  shares  may  not
simultaneously engage in market making activities with respect to the particular
offered shares being distributed for a period of nine business days prior to the
commencement  of  the  distribution.   All  of  the  foregoing  may  affect  the
marketability  of the offered  shares and the ability of any person or entity to
engage in market making activities with respect to the offered shares.

         Our estimated expenses aggregate to approximately $26,000.

                                  LEGAL MATTERS

         Sullivan & Worcester  LLP,  Boston,  Massachusetts,  our lawyers,  have
issued an opinion  about the  legality of our shares.  Sullivan & Worcester  LLP
relied,  as to certain  matters of Maryland  law,  upon one or more  opinions of
Ballard Spahr Andrews & Ingersoll,  LLP, Baltimore,  Maryland.  Barry M. Portnoy
was a partner and  chairman of the firm of Sullivan & Worcester  LLP until March
31, 1997 and is one of our  managing  trustees.  Mr.  Portnoy is also a managing
trustee  of  Hospitality  Properties  Trust,  a  director  and 50% owner of Reit
Management  &  Research,  Inc.,  our  investment  advisor,  and a  director  and
significant  shareholder  of one of  our  tenants.  Jennifer  B.  Clark,  a vice
president  at Reit  Management  &  Research,  Inc.,  was a partner of Sullivan &
Worcester  LLP until July 1,  1999.  Sullivan &  Worcester  LLP also  represents
Hospitality  Properties  Trust,  Reit  Management  &  Research,  Inc.  and their
affiliates on various matters.

                                     EXPERTS

         Our consolidated financial statements and financial statement schedules
included or  incorporated by reference in our Annual Report on Form 10-K for the
year ended December 31,

                                       13

<PAGE>
1998 have been audited by Ernst & Young LLP, independent  auditors, as set forth
in their reports thereon included  therein and incorporated  herein by reference
which,  as to the years 1998,  1997 and 1996, are based in part on the report of
Arthur Andersen LLP,  independent public accountants.  The financial  statements
referred to above are  incorporated  herein by reference  in reliance  upon such
reports  given upon the  authority  of such firms as experts in  accounting  and
auditing.

                              ABOUT THIS PROSPECTUS

         This prospectus is part of a registration statement on Form S-3 that we
have filed with the Securities and Exchange Commission. This prospectus does not
contain all of the information that you will find in the registration statement.
Statements  in this  prospectus  about the  contents  of any  contract  or other
document are not necessarily  complete.  In addition to reading this prospectus,
you should read the copies of the  contracts  and other  documents  that we have
filed as exhibits to the registration statement.  The statements we make in this
prospectus  are  qualified in all respects by the  information  contained in the
exhibits to the registration  statement.  The section called "Where You Can Find
More Information" below contains  information about how you can obtain copies of
the registration statement and additional information about us.

         You should rely only on the  information  contained or  incorporated by
reference in this  prospectus.  We have not, and the selling  shareholders  have
not, authorized any other person to provide you with different  information.  If
anyone provides you with different or inconsistent  information,  you should not
rely on it. We are not, and the selling shareholders are not, making an offer to
sell  these  securities  in any  jurisdiction  where  the  offer  or sale is not
permitted.  You should assume that the information appearing in this prospectus,
as  well  as  the  information  we  have  previously  filed  with  the  SEC  and
incorporated by reference, is accurate only as of the date on the front cover of
this prospectus.  Our business,  financial condition,  results of operations and
prospects may have changed since that date.

                     INCORPORATION OF DOCUMENTS BY REFERENCE

         The SEC allows us to "incorporate by reference" the information we file
with them,  which means that we can  disclose  important  information  to you by
referring you to those documents.  The information  incorporated by reference is
considered to be part of this  prospectus,  and later  information  that we file
with the SEC will  automatically  update  and  supersede  this  information.  We
incorporate  by reference the  documents  listed below which were filed with the
SEC under the Securities Exchange Act of 1934, as amended:

     o    Annual Report on Form 10-K for the year ended December 31, 1998;

     o    Quarterly  Reports on Form 10-Q for the quarterly  periods ended March
          31, 1999 and June 30, 1999;

     o    Current Reports on Form 8-K dated March 5, 1999, March 11, 1999, March
          19, 1999, June 14, 1999 and July 30, 1999; and


                                       14
<PAGE>

     o    the  description  of our common shares  contained in our  Registration
          Statement  on Form 8-A dated  November  8, 1986,  as amended by Form 8
          dated July 30, 1991.

         We also  incorporate by reference each of the following  documents that
we will file with the SEC after the date of this  prospectus  but before the end
of the offering of the offered shares:

     o    Reports filed under Sections 13(a) and (c) of the Exchange Act;

     o    Definitive  proxy or information  statements filed under Section 14 of
          the  Exchange  Act in  connection  with any  subsequent  stockholders'
          meeting; and

     o    Any reports filed under Section 15(d) of the Exchange Act.

         We also  incorporate  by reference  each of the reports and  statements
described in the preceding  paragraph  which we will file with the SEC after the
date of the registration statement of which this prospectus is a part but before
the effectiveness of that registration statement.

         You may request a copy of any of the filings (excluding  exhibits),  at
no cost, by writing or telephoning us at the following address:

                  Investor Relations
                  HRPT Properties Trust
                  400 Centre Street
                  Newton, Massachusetts  02458
                  (617) 332-3990

                       WHERE YOU CAN FIND MORE INFORMATION

         You may read and copy  any  material  that we file  with the SEC at the
SEC's Public Reference Room at 450 Fifth Street, N.W.,  Washington,  D.C. 20549.
You may obtain  information  on the  operation of the Public  Reference  Room by
calling the SEC at 1-800-SEC- 0330. You may access our electronic filings on the
SEC's  Internet site,  http://www.sec.gov,  which  contains  reports,  proxy and
information  statements  and  other  information  regarding  issuers  that  file
electronically with the SEC.

                           FORWARD LOOKING STATEMENTS

         This prospectus  contains  statements which constitute  forward looking
statements within the meaning of the Private Securities Litigation Reform Act of
1995.  Those  statements  appear in a number of  places in this  prospectus  and
include  statements  regarding the intent,  belief or  expectations of HRPT, its
trustees or its officers  with  respect to the  policies  and plans of HRPT.  We
caution you that these forward  looking  statements are not guarantees of future
performance  and involve risks and  uncertainties,  and that actual  results may
differ  materially from those  contained in the forward looking  statements as a
result of various factors. These factors include, without limitation, changes in
financing terms, our ability or inability to complete acquisitions and financing
transactions,  results of operations of our  properties  and general changes in

                                       15

<PAGE>
economic conditions not presently contemplated. The information contained in our
Annual Report on Form 10-K for the year ended  December 31, 1998,  including the
information under the heading "Management's Discussion and Analysis of Financial
Condition and Results of Operations,"  identifies  other important  factors that
could cause these differences.


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

         The Amended and Restated  Declaration of Trust establishing HRPT, dated
July 1, 1994, a copy of which,  together with all  amendments  thereto,  is duly
filed in the office of the Department of  Assessments  and Taxation of the State
of  Maryland,  provides  that the name  "HRPT  Properties  Trust"  refers to the
trustees  under the  declaration  of trust  collectively  as  trustees,  but not
individually or personally, and that no trustee, officer, shareholder,  employee
or agent of HRPT shall be held to any personal liability,  jointly or severally,
for any obligation of, or claim against, HRPT. All persons dealing with HRPT, in
any way, shall look only to the assets of HRPT for the payment of any sum or the
performance of any obligation.





                                       16
<PAGE>


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

         Set forth below is an estimate  (except in the case of the registration
fee) of the amount of fees and  expenses to be incurred in  connection  with the
issuance and distribution of the offered shares  registered  hereby,  other than
underwriting  discounts and commission,  if any, incurred in connection with the
sale of the offered  shares.  All such amounts will be borne by HRPT  Properties
Trust (the "Company").

Registration Fee Under Securities Act                         $6,032.74
Blue Sky Fees and Expenses                                         0.00
Legal Fees and Expenses                                       10,000.00
Accounting Fees and Expenses                                   5,000.00
Printing and Engraving                                             0.00
Miscellaneous Fees and Expenses                                5,000.00
                                                           ------------
   Total:                                                    $26,032.74


Item 15. Indemnification of Directors and Officers

         Section 7.4 of the Company's Amended and Restated Declaration of Trust,
filed as an Exhibit to the  Company's  Current  Report on Form 8-K dated May 27,
1998,  which  provides  for  indemnification  of  Trustees  and  officers of the
Company, is hereby incorporated by reference.

Item 16. Exhibits

3.1      Composite  copy of Third  Amendment and  Restatement  of Declaration of
         Trust  of  the  Company  dated  July  1,  1994,  as  amended  to  date.
         (Incorporated by reference to the Company's Current Report on Form 8- K
         dated July 1, 1998)

3.2      Articles  Supplementary  dated November 4, 1994 to Third  Amendment and
         Restatement  of Declaration of Trust of the Company dated July 1, 1994,
         creating the Junior  Participating  Preferred Shares.  (Incorporated by
         reference  to the  Company's  Current  Report on Form 8-K dated May 27,
         1998)

3.3      Articles  Supplementary  dated  May 13,  1997 to  Third  Amendment  and
         Restatement  of Declaration of Trust of the Company dated July 1, 1994,
         increasing the Junior Participating Preferred Shares.  (Incorporated by
         reference  to the  Company's  Current  Report on Form 8-K dated May 27,
         1998)

3.4      Articles  Supplementary  dated  May 22,  1998 to  Third  Amendment  and
         Restatement  of Declaration of Trust of the Company dated July 1, 1994,
         increasing the Junior Participating Preferred Shares.  (Incorporated by
         reference  to the  Company's  Current  Report on Form 8-K dated May 27,
         1998)

3.5      By-Laws of the Company, as amended to date.  (Incorporated by reference
         to the Company's Current Report on Form 8-K dated May 27, 1998)

4.1      Form of Common  Share  Certificate.  (Incorporated  by reference to the
         Company's Current Report on Form 8-K dated March 11, 1999)

4.2      Rights  Agreement  dated October 17, 1994 between the Company and State
         Street Bank and Trust Company,  as Rights Agent  (including the form of
         Articles Supplementary  relating to the Junior Participating  Preferred
         Shares annexed as an exhibit  thereto).  (Incorporated  by reference to
         the  Company's  Registration  Statement  on Form 8-A dated  October 24,
         1994)

5.1      Opinion of Sullivan & Worcester LLP.  (Filed herewith)

                                      II-1

<PAGE>


5.2      Opinion of Ballard Spahr Andrews & Ingersoll, LLP.  (Filed herewith)

8        Opinion of Sullivan and Worcester LLP as to certain tax matters. (Filed
         herewith)

23.1     Consent of Ernst & Young LLP.  (Filed herewith)

23.2     Consent of Arthur Andersen LLP (Filed herewith)

23.3     Consent of Sullivan & Worcester LLP.  (Included in Exhibits 5.1 and 8)

23.4     Consent of Ballard Spahr Andrews & Ingersoll, LLP. (Included in Exhibit
         5.2)

24       Powers of Attorney.  (Contained on Page II-4)

Item 17. Undertakings

(a)      The undersigned registrant hereby undertakes:

         (1) To file, during any period in which offers or sales are being made,
         a post-effective amendment to this registration statement:

                  (i)      To  include  any   prospectus   required  by  section
                           10(a)(3) of the Securities Act of 1933;

                  (ii)     To  reflect  in the  prospectus  any  facts or events
                           arising after the effective date of the  registration
                           statement   (or  the   most   recent   post-effective
                           amendment  thereof)  which,  individually  or in  the
                           aggregate,  represent  a  fundamental  change  in the
                           information set forth in this registration statement.
                           Notwithstanding   the  foregoing,   any  increase  or
                           decrease  in volume  of  securities  offered  (if the
                           total dollar value of  securities  offered  would not
                           exceed that which was  registered)  and any deviation
                           from  the low or high  end of the  estimated  maximum
                           offering  range  may  be  reflected  in the  form  of
                           prospectus filed with the Commission pursuant to Rule
                           424(b)  (Section  230.424(b) of 17 C.F.R.) if, in the
                           aggregate,  the changes in volume and price represent
                           no more than a 20%  change in the  maximum  aggregate
                           offering  price  set  forth  in the  "Calculation  of
                           Registration Fee" table in the effective registration
                           statement; and

                  (iii)    To include any material  information  with respect to
                           the plan of distribution not previously  disclosed in
                           this registration statement or any material change to
                           such information in this registration statement;

         provided,  however, that subparagraphs (i) and (ii) do not apply if the
         information  required to be included in a  post-effective  amendment by
         those  paragraphs  is contained in the periodic  reports  filed with or
         furnished to the Securities  and Exchange  Commission by the registrant
         pursuant to Section 13 or Section 15(d) of the Securities  Exchange Act
         of 1934  that  are  incorporated  by  reference  in  this  registration
         statement.

         (2) That  for the  purpose  of  determining  any  liability  under  the
         Securities Act of 1933,  each such  post-effective  amendment  shall be
         deemed to be a new  registration  statement  relating to the securities
         offered herein,  and the offering of such securities at that time shall
         be deemed to be the initial bona fide offering thereof.

         (3) To remove from registration by means of a post-effective  amendment
         any of the  securities  being  registered  which  remain  unsold at the
         termination of the offering.

(b)      The  undersigned  registrant  hereby further  undertakes  that, for the
         purposes of determining any liability under the Securities Act of 1933,
         each filing of the registrant's annual report pursuant to Section 13(a)
         or  Section  15(d)  of the  Securities  Exchange  of  1934  (and  where
         applicable,  each filing of an employee  benefit  plan's  annual report
         pursuant to Section 15(d) of the Securities  Exchange Act of 1934) that
         is  incorporated

                                      II-2

<PAGE>

         by reference in this registration statement shall be deemed to be a new
         registration  statement  relating to the securities offered herein, and
         the offering of such  securities at that time shall be deemed to be the
         initial bona fide offering thereof.

(c)      Insofar as indemnification for liabilities arising under the Securities
         Act of 1933 may be  permitted to  trustees,  officers  and  controlling
         persons of the registrant  pursuant to the provisions  described  under
         Item  15 of this  registration  statement,  or  otherwise  (other  than
         insurance),  the registrant has been advised that in the opinion of the
         Securities  and Exchange  Commission  such  indemnification  is against
         public   policy   as   expressed   in  such  Act  and  is,   therefore,
         unenforceable.  In the event that a claim for  indemnification  against
         such liabilities  (other than the payment by the registrant of expenses
         incurred  or paid by a trustee,  officer or  controlling  person of the
         registrant in the successful defense of any action, suit or proceeding)
         is  asserted  by  such  trustee,   officer  or  controlling  person  in
         connection with the securities being  registered,  the registrant will,
         unless in the  opinion of its  counsel  the matter has been  settled by
         controlling  precedent,  submit to a court of appropriate  jurisdiction
         the  question  whether  such  indemnification  by it is against  public
         policy  as  expressed  in such Act and will be  governed  by the  final
         adjudication of such issue.


                                      II-3

<PAGE>


                                   SIGNATURES

         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of Newton,  Commonwealth of Massachusetts,  on September
3, 1999.

                                  HRPT PROPERTIES TRUST


                                  By: /s/ David J. Hegarty
                                       David J. Hegarty
                                       President and Chief Operating Officer

         Pursuant to the requirements of the Securities Act of 1933, as amended,
this  Registration  Statement  on Form S-3  relating  to common  shares has been
signed  below  by the  following  persons  in the  capacities  and on the  dates
indicated;  and each of the undersigned officers and trustees of HRPT Properties
Trust,  hereby  severally  constitute and appoint David J. Hegarty,  Ajay Saini,
John A. Mannix, John Popeo,  Gerard M. Martin and Barry M. Portnoy,  and each of
them,  to sign for him, and in his name in the capacity  indicated  below,  this
Registration  Statement for the purpose of registering such securities under the
Securities Act of 1933, as amended,  and any and all amendments thereto, and any
other  Registration  Statement filed by HRPT  Properties  Trust pursuant to Rule
462(b) which registers additional amounts of such securities for the offering or
offerings  contemplated by this Registration  Statement (a "462(b)  Registration
Statement") hereby ratifying and confirming our signatures as they may be signed
by our  attorneys  to  this  Registration  Statement,  any  462(b)  Registration
Statement and any and all amendments to either thereof.
<TABLE>
<CAPTION>
      Signature                                      Title                                         Date
      ---------                                      -----                                         ----
<S>                                      <C>                                                  <C>

/s/ David J. Hegarty                      President and Chief Operating                        September 3, 1999
David J. Hegarty                          Officer (principal executive officer)


/s/ Ajay Saini                            Treasurer and Chief Financial                        September 3, 1999
Ajay Saini                                Officer


/s/ Patrick F. Donelan                    Trustee                                              September 3, 1999
Patrick F. Donelan


/s/ Bruce M. Gans, M.D.                   Trustee                                              September 3, 1999
Bruce M. Gans, M.D.


/s/ Rev. Justinian Manning, C.P.          Trustee                                              September 3, 1999
Rev. Justinian Manning, C.P.


/s/ Gerard M. Martin                      Managing Trustee                                     September 3, 1999
Gerard M. Martin


/s/ Barry M. Portnoy                      Managing Trustee                                     September 3, 1999
Barry M. Portnoy
</TABLE>


                                                       II-4

                                                                     EXHIBIT 5.1


                              SULLIVAN & WORCESTER LLP
                               ONE POST OFFICE SQUARE
                             BOSTON, MASSACHUSETTS 02109
                                   (617) 338-2800
                                FAX NO. 617-338-2880
     IN WASHINGTON, D.C.                                   IN NEW YORK CITY
1025 CONNECTICUT AVENUE, N.W.                              767 THIRD AVENUE
   WASHINGTON, D.C. 20036                              NEW YORK, NEW YORK 10017
       (202) 775-8190                                       (212) 486-8200
    FAX NO. 202-293-2275                                 FAX NO. 212-758-2151






                                      September 3, 1999



HRPT Properties Trust
400 Centre Street
Newton, Massachusetts 02458

         Re:      Registration Statement on Form S-3; 1,224,074 Common Shares of
                  Beneficial Interest, par value $.01 per share

Dear Sir or Madam:

         In connection with the  registration  under the Securities Act of 1933,
as amended  (the  "Act"),  by HRPT  Properties  Trust,  a Maryland  real  estate
investment  trust (the  "Company"),  of 1,224,074  shares (the  "Shares") of its
common shares of  beneficial  interest,  par value $.01 per share,  all of which
Shares  are to be sold  from time to time by HRPT  Advisors,  Inc.,  a  Delaware
Corporation, Gerard M. Martin and Barry M. Portnoy (the "Selling Shareholders"),
at the direction of a lender or lenders or otherwise,  the following  opinion is
furnished to you to be filed with the  Securities and Exchange  Commission  (the
"Commission") as Exhibit 5.1 to the Company's registration statement on Form S-3
(the "Registration Statement").  The Registration Statement describes a proposed
reoffering  and  resale  of  the  Shares  by  the  Selling   Shareholders   (the
"Offering").

         We have  acted  as  counsel  to the  Company  in  connection  with  the
Offering,  and we have  examined  originals  or copies,  certified  or otherwise
identified to our satisfaction,  of the Registration Statement,  the Amended and
Restated Declaration of Trust of the Company, as presently in effect,  corporate
records,  certificates and statements of officers and accountants of the Company
and of  public  officials,  and  such  other  documents  as we  have  considered
necessary in order to furnish the opinion hereinafter set forth.

         We express no opinion herein as to the laws of any  jurisdiction  other
than the Commonwealth of Massachusetts and the federal law of the United States,
and we express no opinion as to state  securities  or blue sky laws.  Insofar as
this opinion  involves  matters of Maryland law we have,  with your  permission,
relied solely on the opinion of Ballard,  Spahr, Andrews & Ingersoll LLP, a copy
of which is being filed herewith as Exhibit 5.2 to the


<PAGE>


HRPT Properties Trust
September 3, 1999
Page 2


Registration   Statement,   and  our  opinion  is  subject  to  the  exceptions,
qualifications and limitations therein expressed.

         Based on and subject to the  foregoing,  we are of the opinion that, as
of the date hereof, the Shares are duly authorized,  validly issued,  fully paid
and nonassessable by the Company.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration  Statement  and to the  reference  to our  firm  in the  Prospectus
forming a part of the Registration  Statement. In giving such consent, we do not
thereby  admit that we come  within the  category  of persons  whose  consent is
required  under  Section  7 of the  Act  or the  rules  and  regulations  of the
Commission promulgated thereunder.

                                             Very truly yours,

                                             /s/ SULLIVAN & WORCESTER LLP
                                             SULLIVAN & WORCESTER LLP




                                                                     EXHIBIT 5.2
                     BALLARD SPAHR ANDREWS & INGERSOLL, LLP
                                   19th Floor
                            300 East Lombard Street
                         Baltimore Maryland 21202-3268
                                 (410) 528-5600
                               FAX (410) 528-5650


                                                 September 3, 1999

HRPT Properties Trust
400 Centre Street
Newton, Massachusetts 02158

                  Re:      Registration Statement on Form S-3

Ladies and Gentlemen:

         We have acted as Maryland counsel for HRPT Properties Trust, a Maryland
real estate investment trust (the "Company"), in connection with certain matters
of Maryland law arising out of the  registration of 1,224,074 common shares (the
"Shares")  of  beneficial  interest,  $.01 par value per share,  of the  Company
("Common Shares"),  covered by the above-referenced  Registration Statement, and
all amendments thereto (the "Registration Statement"), filed by the Company with
the Securities and Exchange  Commission (the "Commission")  under the Securities
Act of 1933, as amended (the "1933 Act"). The Shares were issued to the Advisors
(as defined herein) and certain affiliates of such Advisors and may be sold from
time  to  time  by the  selling  shareholders  referred  to in the  Registration
Statement.  Unless otherwise defined herein,  capitalized terms used herein have
the meanings given to them in the Registration Statement.

         In connection with our  representation  of the Company,  and as a basis
for the opinion  hereinafter  set forth, we have examined  originals,  or copies
certified  or  otherwise  identified  to  our  satisfaction,  of  the  following
documents (hereinafter collectively referred to as the "Documents"):

1.       The Registration Statement;

2.       The  Amended  and  Restated  Declaration  of Trust of the  Company,  as
         amended (the "Declaration of Trust"),  certified as of a recent date by
         the State  Department  of  Assessments  and  Taxation of Maryland  (the
         "SDAT");

<PAGE>
HRPT Properties Trust
September 3, 1999
Page 2



3.       The  Bylaws  of the  Company,  certified  as of the date  hereof by the
         Treasurer and Chief Financial Officer of the Company;

4.       A  certificate  as of a recent date of the SDAT as to the good standing
         of the Company;

5.       Resolutions adopted by the Board of Trustees of the Company (the "Board
         of Trustees"),  or a duly authorized committee thereof, relating to the
         approval  of the  Advisory  Agreements  (as  defined  herein)  and  the
         authorization  of the  issuance  and  registration  of the Shares  (the
         "Resolutions"),  certified as of the date hereof by the  Treasurer  and
         Chief Financial Officer of the Company;

6.       The Advisory  Agreement,  dated as of November 20, 1986, as amended, by
         and between the Company and HRPT Advisors, Inc., a Delaware corporation
         ("HRPT Advisors"), pursuant to which certain of the Shares were issued,
         and the Advisory Agreement, dated as of January 1, 1998, by and between
         the  Company  and  Reit   Management  &  Research,   Inc.,  a  Delaware
         corporation  ("RMR,"  and  together  with HRPT  Advisors,  collectively
         referred to as the "Advisors"), pursuant to which certain of the Shares
         were issued  (collectively  referred to as the "Advisory  Agreements"),
         certified as of the date hereof by the  Treasurer  and Chief  Financial
         Officer of the Company;

7.       A certificate  executed by the Treasurer and Chief Financial Officer of
         the Company, dated as of the date hereof; and

8.       Such  other  documents  and  matters  as we have  deemed  necessary  or
         appropriate  to express  the opinion  set forth  below,  subject to the
         assumptions, limitations and qualifications stated herein.

         In  expressing  the  opinion  set  forth  below,  we have  assumed  the
following:

         1. Each of the parties  (other than the Company)  executing  any of the
Documents has duly and validly  executed and delivered  each of the Documents to
which such party is a signatory,  and such party's obligations set forth therein
are legal, valid and binding.

<PAGE>

HRPT Properties Trust
September 3, 1999
Page 3


         2. Each individual  executing any of the Documents on behalf of a party
(other than the Company) is duly authorized to do so.

         3. Each individual executing any of the Documents, whether on behalf of
such individual or another person, is legally competent to do so.

         4. Any  Documents  submitted  to us as  originals  are  authentic.  Any
Documents  submitted  to us as certified or  photostatic  copies  conform to the
original  documents.  All  signatures on all  Documents are genuine.  All public
records  reviewed or relied  upon by us or on our behalf are true and  complete.
All factual  statements and information  contained in the Documents are true and
complete.  There  has  been  no  modification  of or  amendment  to  any  of the
Documents,  and  there  has  been  no  waiver  of  any  provision  of any of the
Documents, by action or omission of the parties or otherwise.

         5. All  actions  required  to be taken and  resolutions  required to be
adopted by any committee of the Board of Trustees in order to validly  authorize
the issuance of any of the Shares under  Maryland law pursuant to any delegation
to any such  committee  by the Board of  Trustees in the  Resolutions  were duly
taken and adopted prior to the issuance of any of the Shares.

         6. The Shares have not been issued or  transferred  in violation of any
restriction or limitation contained in the Declaration of Trust.

         Based upon the foregoing,  and subject to the assumptions,  limitations
and qualifications stated herein, it is our opinion that, as of the date hereof:

         1. The  Company  is a real  estate  investment  trust  duly  formed and
existing under and by virtue of the laws of the State of Maryland and is in good
standing with the SDAT.

         2. The Shares  have been duly  authorized  and  validly  issued and are
fully paid and nonassessable.

         The foregoing  opinion is limited to the substantive  laws of the State
of Maryland and we do not express any opinion  herein  concerning any other law.
We express no opinion as to compliance  with federal or state  securities  laws,
including  the  securities  laws of the State of  Maryland,  or as to federal or
state laws regarding fraudulent transfers. To the extent that


<PAGE>


HRPT Properties Trust
September 3, 1999
Page 4


any matter as to which our opinion is expressed  herein would be governed by the
laws of any jurisdiction other than the State of Maryland, we do not express any
opinion on such matter. The opinion expressed herein is subject to the effect of
judicial decisions which may permit the introduction of parol evidence to modify
the terms or the interpretation of agreements.

         We assume no obligation to  supplement  this opinion if any  applicable
law changes  after the date hereof or if we become  aware of any fact that might
change any opinion expressed herein after the date hereof.

         This opinion is being furnished to you for submission to the Commission
as an exhibit to the Registration Statement and, accordingly,  may not be relied
upon by,  quoted in any manner to, or  delivered  to any other  person or entity
(except  Sullivan & Worcester  LLP,  counsel to the  Company)  without,  in each
instance, our prior written consent.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration Statement and to the use of the name of our firm therein. In giving
this  consent,  we do not admit that we are within the category of persons whose
consent is required by Section 7 of the 1933 Act.

                                        Very truly yours,


                                        Ballard Spahr Andrews & Ingersoll, LLP


                              SULLIVAN & WORCESTER LLP
                               ONE POST OFFICE SQUARE
                             BOSTON, MASSACHUSETTS 02109
                                   (617) 338-2800
                                FAX NO. 617-338-2880
     IN WASHINGTON, D.C.                                   IN NEW YORK CITY
1025 CONNECTICUT AVENUE, N.W.                              767 THIRD AVENUE
   WASHINGTON, D.C. 20036                              NEW YORK, NEW YORK 10017
       (202) 775-8190                                       (212) 486-8200
    FAX NO. 202-293-2275                                 FAX NO. 212-758-2151




                                                                   Exhibit 8



                                            September 3, 1999




HRPT Properties Trust
400 Centre Street
Newton, Massachusetts  02458

Ladies and Gentlemen:

         In connection with the  registration  statement to be filed on Form S-3
(the "Registration Statement"), by HRPT Properties Trust, a Maryland real estate
investment trust (the "Company"),  the following  opinion is furnished to you to
be filed  therewith as Exhibit 8 under the  Securities  Exchange Act of 1934, as
amended (the "Exchange Act").

         We have  acted  as  counsel  for the  Company  in  connection  with its
Registration  Statement and we have examined  originals or copies,  certified or
otherwise  identified  to  our  satisfaction,  of  the  Registration  Statement,
corporate  records,  certificates  and statements of officers and accountants of
the  Company  and of  public  officials,  and such  other  documents  as we have
considered  relevant and  necessary in order to furnish the opinion  hereinafter
set forth.  Specifically,  and without limiting the generality of the foregoing,
we have reviewed the Company's  declaration  of trust,  as amended and restated,
the  by-laws  of the  Company,  the  prospectus  dated  September  3,  1999 (the
"Prospectus"),  and the Company's  Annual Report on Form 10-K for the year ended
December 31, 1998, filed under the Exchange Act (the "Annual  Report").  We have
reviewed  the  sections  of the  Annual  Report  captioned  "Federal  Income Tax
Considerations"  and  "ERISA  Plans,  Keogh  Plans  and  Individual   Retirement
Accounts."  With respect to all questions of fact on which the opinion set forth
below is based, we have assumed the accuracy and completeness of and have relied
on the information set forth in the Prospectus and the Annual Report, and in the
documents  incorporated therein by reference,  and on representations made to us
by the  officers  of the  Company.  We  have  not  independently  verified  such
information.

         The opinion set forth below is based upon the Internal  Revenue Code of
1986,  as  amended,  the  Treasury  Regulations  issued  thereunder,   published
administrative  interpretations  thereof,  and judicial  decisions  with respect
thereto, all as of the date hereof (collectively,  the "Tax Laws"), and upon the
Employee  Retirement Income Security Act of 1974, as amended,  the Department of
Labor regulations issued thereunder, published administrative interpretations


<PAGE>


HRPT Properties Trust
September 3, 1999
Page 2


thereof,  and judicial decisions with respect thereto, all as of the date hereof
(collectively, the "ERISA Laws"). No assurance can be given that the Tax Laws or
the ERISA Laws will not change. In preparing the discussions with respect to Tax
Laws and ERISA Laws  matters in the  sections  of the  Annual  Report  captioned
"Federal Income Tax Considerations" and "ERISA Plans, Keogh Plans and Individual
Retirement  Accounts," we have made certain  assumptions  and expressed  certain
conditions and qualifications therein, all of which assumptions,  conditions and
qualifications are incorporated herein by reference.

         Based upon and subject to the foregoing, we are of the opinion that the
discussions  with  respect to Tax Laws and ERISA Laws matters in the sections of
the Annual  Report  captioned  "Federal  Income Tax  Considerations"  and "ERISA
Plans, Keogh Plans and Individual Retirement Accounts," in all material respects
are  accurate  and fairly  summarize  the Tax Laws  issues and ERISA Laws issues
addressed  therein,  and hereby confirm that the opinions of counsel referred to
in said sections represent our opinions on the subject matter thereof.

         We hereby consent to the  incorporation of this opinion by reference as
an exhibit to the Registration Statement and to the reference to our firm in the
Prospectus.  In giving such consent, we do not thereby admit that we come within
the  category  of persons  whose  consent  is  required  under  Section 7 of the
Securities Act of 1933 or under the rules and regulations of the SEC promulgated
thereunder.

                                              Very truly yours,



                                              /s/ SULLIVAN & WORCESTER LLP
                                              SULLIVAN & WORCESTER LLP




                                                                    Exhibit 23.1


                         CONSENT OF INDEPENDENT AUDITORS


We  consent to the  reference  to our firm under the  caption  "Experts"  in the
Registration  Statement  (Form S-3) and related  Prospectus  of HRPT  Properties
Trust for the registration of 1,224,074 common shares of beneficial interest and
to the  incorporation by reference therein of our report dated February 5, 1999,
with respect to the  consolidated  financial  statements  and  schedules of HRPT
Properties  Trust  incorporated  by reference  or included in its Annual  Report
(Form 10-K) for the year ended December 31, 1998,  filed with the Securities and
Exchange Commission.



                                                     /s/ERNST & YOUNG LLP

Boston, Massachusetts
August 30, 1999

                              ARTHUR ANDERSEN LLP



                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS



As independent  public  accountants,  we hereby consent to the  incorporation by
reference  in HRPT  Properties  Trust's  registration  statement  on Form S-3 to
register  1,224,074  common  shares of  beneficial  interest of our report dated
January 15, 1999 on Hospitality  Properties  Trust  included in HRPT  Properties
Trust's Form 8-K dated March 5, 1999 for the year ended December 31, 1998 and to
all references to our Firm included in the registration statement.

                                             /s/ Arthur Andersen LLP



Vienna, VA
August 31, 1999




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