PRIME RETAIL INC
SC 13D/A, 1999-03-04
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>


                                    UNITED STATES
                          SECURITIES AND EXCHANGE COMMISSION
                                WASHINGTON, D.C. 20549
                                 ____________________

                                   AMENDMENT NO. 1
                                          TO
                                     SCHEDULE 13D
                      UNDER THE SECURITIES EXCHANGE ACT OF 1934
                                 ____________________

                                  PRIME RETAIL, INC.
                                   (Name of Issuer)
                                           
                       COMMON STOCK, PAR VALUE $0.01 PER SHARE
                            (Title of Class of Securities)
  
                                      741570105
                                    (CUSIP Number)

                                  MICHAEL W. RESCHKE
                                 77 WEST WACKER DRIVE
                                      SUITE 4200
                                  CHICAGO, IL 60601
                                    (312) 917-1500
             (Name, Address and Telephone Number of Person Authorized to
                         Receive Notices and Communications)

                                   With a copy to:
                                WAYNE D. BOBERG, ESQ.
                                   WINSTON & STRAWN
                                 35 WEST WACKER DRIVE
                                  CHICAGO, IL 60601
                                    (312) 558-5600

                                  DECEMBER 18, 1998
               (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to 
report the acquisition that is the subject of this Schedule 13D, and is 
filing this schedule because of Sections 240.13d-1(e), or 240.13d-1(f) or 
240.13d-1(g), check the following box: / /


<PAGE>

                                     SCHEDULE 13D

       CUSIP No.    741570105

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

      1.   NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                Michael W. Reschke
- -------------------------------------------------------------------------------
      2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP,          (a) / /
                                                                      (b) /X/

- -------------------------------------------------------------------------------
      3.   SEC USE ONLY
- -------------------------------------------------------------------------------
      4.   SOURCE OF FUNDS

                00 
- -------------------------------------------------------------------------------
      5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS 
           REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                        / /
- -------------------------------------------------------------------------------
      6.   CITIZENSHIP OR PLACE OF ORGANIZATION

                United States of America
- -------------------------------------------------------------------------------

           NUMBER OF SHARES      7.   SOLE VOTING POWER -539,140
        BENEFICIALLY OWNED BY    ----------------------------------------------
        EACH REPORTING PERSON    8.   SHARED VOTING POWER - 7,594,629
                 WITH            ----------------------------------------------
                                 9.   SOLE DISPOSITIVE POWER - 539,140
                                 ----------------------------------------------
                                 10.  SHARED DISPOSITIVE POWER - 7,594,629
- -------------------------------------------------------------------------------


                                     2

<PAGE>
- -------------------------------------------------------------------------------
      11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      Individually beneficially owns 152,717 shares of Common Stock, $0.01 par
      value per share, of the Issuer ("Common Stock"),  9,552 shares of Series
      B Preferred Stock, $0.01 par value per share, of the Issuer ("Preferred
      Stock"), which is immediately convertible into 11,424 shares of Common
      Stock, and certain options to purchase 374,999 shares of Common Stock,
      which options have already vested or will vest within 60 days.  May be
      deemed to share beneficial ownership of: (i) 250,000 shares of Common
      Stock directly owned by Prime Group Limited Partnership, an Illinois
      limited partnership ("PGLP"); (ii) 5,557,000 Common Units of Prime
      Retail, L.P., a Delaware limited partnership ("Common Units"), which
      Common Units are exchangeable on a one for one basis for Common Stock at
      any time (or, at Issuer's election, cash of equivalent value), directly
      owned by Prime Financing Limited Partnership, an Illinois limited
      partnership ("PFLP");  (iii) 884,541 Common Units directly owned by Prime
      Group II, L.P., an Illinois limited partnership ("PG-II"); (iv) 97,456
      Common Units directly owned by Prime Group IV, L.P., an Illinois limited
      partnership ("PG-IV"); (v) 701,000 Common Units directly owned by Prime
      Group V, L.P., an Illinois limited partnership ("PG-V"); and (vi) 104,632
      Common Units directly owned by Prime Group VI, L.P., an Illinois limited
      partnership ("PG-VI") by virtue of his position as managing general
      partner of PGLP and his ability to control PGLP, Inc. ("PGLPI"), Prime
      Finance, Inc. ("Prime Finance"), PFLP, PG-II, PG-IV, PG-V and PG-VI. 
      PGLPI is the managing general partner of PG-II, PG-IV, PG-V and PG-VI. 
      Prime Finance is the general managing partner of PFLP.
- -------------------------------------------------------------------------------

      12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
           SHARES / /
- -------------------------------------------------------------------------------
      13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 

      Individually beneficially owns 152,717 shares of Common Stock, 9,552
      shares of Preferred Stock and certain options to purchase 374,999 shares
      of Common Stock which, assuming conversion of the Preferred Stock and
      exercise of all vested options, constitute approximately 1.3% of the
      outstanding shares of Common Stock.  May be deemed to share beneficial
      ownership of the approximately: (i) 250,000 shares of Common Stock
      directly owned by PGLP which constitute approximately 0.6% of the
      outstanding shares of Common Stock; (ii) 5,557,000 Common Units directly
      owned by PFLP which, assuming exchange of the Common Units, constitute
      approximately 11.5% of the outstanding shares of Common Stock;  (iii)
      884,541 Common Units directly owned by PG-II which, assuming exchange of
      the Common Units, constitute approximately 2.0% of the outstanding shares
      of Common Stock;  (iv) 97,456 Common Units directly owned by PG-IV which,
      assuming exchange of the Common Units, constitute approximately 0.2% of
      the outstanding shares of Common Stock;  (v) 701,000 Common Units
      directly owned by PG-V which, assuming exchange of the Common Units,
      constitute approximately 1.6% of the outstanding shares of Common Stock;
      and (vi) 104,632 Common Units directly owned by PG-VI which, assuming
      exchange of the Common Units, constitute approximately 0.2% of the
      outstanding shares of Common Stock by virtue of his position as managing
      general partner of PGLP and his ability to control PGLPI, Prime Finance,
      PFLP, PG-II, PG-IV, PG-V and PG-VI.
- -------------------------------------------------------------------------------
      14.  TYPE OF REPORTING PERSON - IN
- -------------------------------------------------------------------------------


                                     3

<PAGE>

                                     SCHEDULE 13D

 CUSIP No.  741570105

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

 1.   NAME OF REPORTING PERSON
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           PGLP, Inc.
- -------------------------------------------------------------------------------
 2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                (a)  / / 
                                                                      (b)  /X/
- -------------------------------------------------------------------------------
 3.   SEC USE ONLY
- -------------------------------------------------------------------------------
 4.   SOURCE OF FUNDS

           Not Applicable
- -------------------------------------------------------------------------------
 5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS 
      REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                              / /
- -------------------------------------------------------------------------------
 6.   CITIZENSHIP OR PLACE OF ORGANIZATION

           Illinois, United States of America
- -------------------------------------------------------------------------------
      NUMBER OF SHARES       7.   SOLE VOTING POWER - 0
 BENEFICIALLY OWNED BY EACH  --------------------------------------------------
    REPORTING PERSON WITH
                             8.   SHARED VOTING POWER - 1,787,629
                             --------------------------------------------------
                             9.   SOLE DISPOSITIVE POWER - 0
                             --------------------------------------------------
                             10.  SHARED DISPOSITIVE POWER - 1,787,629
- -------------------------------------------------------------------------------

 11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           May be deemed to share beneficial ownership of: (i) 884,541 Common
           Units of Prime Retail, L.P., a Delaware limited partnership ("Common
           Units"), which Common Units are exchangeable on a one for one basis
           for Common Stock, $0.01 par value per share, of the Issuer ("Common
           Stock") at any time (or, at the Issuer's election, cash of
           equivalent value), owned by Prime Group II, L.P., an Illinois
           limited partnership ("PG-II"); (ii) 97,456 Common Units owned by
           Prime Group IV, L.P., an Illinois limited partnership ("PG-IV"); 
           (iii) 701,000 Common Units owned by Prime Group V, L.P., an Illinois
           limited partnership ("PG-V"); and (iv) 104,632 Common Units owned by
           Prime Group VI, L.P., an Illinois limited partnership ("PG-VI") by
           virtue of its position as managing general partner of each of PG-II,
           PG-IV, PG-V and PG-VI.
- -------------------------------------------------------------------------------
 12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / /
- -------------------------------------------------------------------------------


                                     4

<PAGE>
- -------------------------------------------------------------------------------
 13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 

           May be deemed to share beneficial ownership of: (i) 884,541 Common
           Units owned by PG-II which, assuming exchange of the Common Units,
           constitute approximately 2.0% of the outstanding shares of Common
           Stock;  (ii) 97,456 Common Units owned by PG-IV which, assuming
           exchange of the Common Units, constitute approximately 0.2% of the
           outstanding shares of Common Stock; (iii) 701,000 Common Units owned
           by PG-V which, assuming exchange of the Common Units, constitute
           approximately 1.6% of the outstanding shares of Common Stock; and
           (iv) 104,632 Common Units owned by PG-VI which, assuming exchange of
           the Common Units, constitute approximately 0.2% of the outstanding
           shares of Common Stock by virtue of its position as managing general
           partner of each of PG-II, PG-IV, PG-V and PG-VI.
- -------------------------------------------------------------------------------

 14.  TYPE OF REPORTING PERSON - CO
- -------------------------------------------------------------------------------


                                     5

<PAGE>

                                    SCHEDULE 13D

 CUSIP No.  741570105

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

 1.   NAME OF REPORTING PERSON
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Prime Finance, Inc.
- -------------------------------------------------------------------------------
 2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP               (a)  / /
                                                                     (b)  /X/
- -------------------------------------------------------------------------------
 3.   SEC USE ONLY
- -------------------------------------------------------------------------------
 4.   SOURCE OF FUNDS

           Not Applicable
- -------------------------------------------------------------------------------

 5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS                          
      REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                              / /
- -------------------------------------------------------------------------------
 6.   CITIZENSHIP OR PLACE OF ORGANIZATION

           Illinois, United States of America
- -------------------------------------------------------------------------------
      NUMBER OF SHARES       7.   SOLE VOTING POWER - 0
 BENEFICIALLY OWNED BY EACH  --------------------------------------------------
    REPORTING PERSON WITH
                             8.   SHARED VOTING POWER - 5,557,000
                             --------------------------------------------------
                             9.   SOLE DISPOSITIVE POWER - 0
                             --------------------------------------------------
                             10.  SHARED DISPOSITIVE POWER - 5,557,000
- -------------------------------------------------------------------------------

 11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           May be deemed to share beneficial ownership of 5,557,000 Common
           Units of Prime Retail, L.P., a Delaware limited partnership ("Common
           Units"), which Common Units are exchangeable on a one for one basis
           for Common Stock, $0.01 par value per share, of the Issuer, at any
           time (or, at the Issuer's election, cash of equivalent value),
           directly owned by Prime Financing Limited Partnership, an Illinois
           limited partnership, by virtue of its position as managing general
           partner of Prime Financing Limited Partnership.
- -------------------------------------------------------------------------------
 12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / /
- -------------------------------------------------------------------------------
 13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 

           May be deemed to share beneficial ownership of 5,557,000 Common
           Units owned by Prime Financing Limited Partnership, which constitute
           approximately 11.5% equity interest in the Issuer, assuming exchange
           of the Common Units, by virtue of its position as general partner of
           Prime Financing Limited Partnership.


                                     6

<PAGE>
- -------------------------------------------------------------------------------
 14.  TYPE OF REPORTING PERSON - CO
- -------------------------------------------------------------------------------
                                    SCHEDULE 13D

 CUSIP No.  741570105

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

 1.   NAME OF REPORTING PERSON
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Prime Group Limited Partnership
- -------------------------------------------------------------------------------
 2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP              (a)  / /
                                                                    (b)  /X/
- -------------------------------------------------------------------------------
 3.   SEC USE ONLY
- -------------------------------------------------------------------------------
 4.   SOURCE OF FUNDS

           00
- -------------------------------------------------------------------------------
 5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS                          
      REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                              / /
- -------------------------------------------------------------------------------
 6.   CITIZENSHIP OR PLACE OF ORGANIZATION

           Illinois, United States of America
- -------------------------------------------------------------------------------

      NUMBER OF SHARES       7.   SOLE VOTING POWER - 250,000
 BENEFICIALLY OWNED BY EACH  --------------------------------------------------
    REPORTING PERSON WITH    8.   SHARED VOTING POWER - 0
                             --------------------------------------------------
                             9.   SOLE DISPOSITIVE POWER - 250,000
                             --------------------------------------------------
                             10.  SHARED DISPOSITIVE POWER - 0
- -------------------------------------------------------------------------------
 11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           250,000 shares of Common Stock, par value $0.01 per share, of the
           Issuer ("Common Stock")
- -------------------------------------------------------------------------------
 12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / /
- -------------------------------------------------------------------------------
 13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 

           Approximately 0.6% equity interest in the Issuer
- -------------------------------------------------------------------------------
 14.  TYPE OF REPORTING PERSON - PN
- -------------------------------------------------------------------------------


                                     7

<PAGE>

                                     SCHEDULE 13D

 CUSIP No.  741570105

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

 1.   NAME OF REPORTING PERSON
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Prime Financing Limited Partnership
- -------------------------------------------------------------------------------
 2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                (a)  / /
                                                                      (b)  /X/
- -------------------------------------------------------------------------------
 3.   SEC USE ONLY
- -------------------------------------------------------------------------------
 4.   SOURCE OF FUNDS

           00
- -------------------------------------------------------------------------------
 5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS                          
      REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                              / /
- -------------------------------------------------------------------------------
 6.   CITIZENSHIP OR PLACE OF ORGANIZATION

           Illinois, United States of America
- -------------------------------------------------------------------------------

      NUMBER OF SHARES       7.   SOLE VOTING POWER - 5,557,000
 BENEFICIALLY OWNED BY EACH  --------------------------------------------------
    REPORTING PERSON WITH    8.   SHARED VOTING POWER - 0
                             --------------------------------------------------
                             9.   SOLE DISPOSITIVE POWER -5,557,000
                             --------------------------------------------------
                             10.  SHARED DISPOSITIVE POWER - 0
- -------------------------------------------------------------------------------

 11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           5,557,000 Common Units of Prime Retail, L.P., a Delaware limited
           partnership  ("Common Units"), which Common Units are exchangeable
           on a one for one basis for Common Stock of the Issuer, $0.01 par
           value per share ("Common Stock"), at any time or, at the Issuer's
           election, cash of equivalent value.
- -------------------------------------------------------------------------------
 12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / /
- -------------------------------------------------------------------------------
 13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 

           Approximately 11.5% equity interest in the Issuer, assuming exchange
           of the Common Units.
- -------------------------------------------------------------------------------
 14.  TYPE OF REPORTING PERSON - PN
- -------------------------------------------------------------------------------


                                     8

<PAGE>

                                    SCHEDULE 13D

 CUSIP No.  741570105

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

 1.   NAME OF REPORTING PERSON
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Prime Group II, L.P.
- -------------------------------------------------------------------------------
 2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP               (a)  / /
                                                                     (b)  /X/
- -------------------------------------------------------------------------------
 3.   SEC USE ONLY
- -------------------------------------------------------------------------------
 4.   SOURCE OF FUNDS

           00
- -------------------------------------------------------------------------------
 5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS                          
      REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                          / /
- -------------------------------------------------------------------------------
 6.   CITIZENSHIP OR PLACE OF ORGANIZATION

           Illinois, United States of America
- -------------------------------------------------------------------------------

      NUMBER OF SHARES       7.   SOLE VOTING POWER -884,541
 BENEFICIALLY OWNED BY EACH  --------------------------------------------------
    REPORTING PERSON WITH    8.   SHARED VOTING POWER - 0
                             --------------------------------------------------
                             9.   SOLE DISPOSITIVE POWER - 884,541
                             --------------------------------------------------
                             10.  SHARED DISPOSITIVE POWER - 0
- -------------------------------------------------------------------------------
 11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           884,541 Common Units of Prime Retail, L.P., a Delaware limited
           partnership ("Common Units"), which Common Units are exchangeable on
           a one for one basis for Common Stock of the Issuer, $0.01 par value
           per share, at any time or, at the Issuer's election, cash of
           equivalent value.
- -------------------------------------------------------------------------------
 12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / /
- -------------------------------------------------------------------------------
 13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 

           Approximately 2.0% equity interest in the Issuer, assuming exchange
           of the Common Units.
- -------------------------------------------------------------------------------
 14.  TYPE OF REPORTING PERSON - PN
- -------------------------------------------------------------------------------


                                     9

<PAGE>

                                    SCHEDULE 13D

 CUSIP No.  741570105

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

 1.   NAME OF REPORTING PERSON
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Prime Group IV, L.P.
- -------------------------------------------------------------------------------
 2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP               (a)  / /
                                                                     (b)  /X/
- -------------------------------------------------------------------------------
 3.   SEC USE ONLY
- -------------------------------------------------------------------------------
 4.   SOURCE OF FUNDS

           00
- -------------------------------------------------------------------------------
 5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS                          
      REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                             / /
- -------------------------------------------------------------------------------
 6.   CITIZENSHIP OR PLACE OF ORGANIZATION

           Illinois, United States of America
- -------------------------------------------------------------------------------

      NUMBER OF SHARES       7.   SOLE VOTING POWER -97,456
 BENEFICIALLY OWNED BY EACH  --------------------------------------------------
    REPORTING PERSON WITH    8.   SHARED VOTING POWER - 0
                             --------------------------------------------------
                             9.   SOLE DISPOSITIVE POWER - 97,456
                             --------------------------------------------------
                             10.  SHARED DISPOSITIVE POWER - 0
- -------------------------------------------------------------------------------
 11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           97,456 Common Units of Prime Retail, L.P., a Delaware limited
           partnership ("Common Units"), which Common Units are exchangeable on
           a one for one basis for Common Stock of the Issuer, $0.01 par value
           per share, at any time or, at the Issuer's election, cash of
           equivalent value.
- -------------------------------------------------------------------------------
 12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / /
- -------------------------------------------------------------------------------
 13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 

           Approximately 0.2% equity interest in the Issuer, assuming exchange
           of the Common Units.
- -------------------------------------------------------------------------------
 14.  TYPE OF REPORTING PERSON - PN
- -------------------------------------------------------------------------------


                                    10

<PAGE>

                                    SCHEDULE 13D


 CUSIP No.  741570105

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

 1.   NAME OF REPORTING PERSON
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Prime Group V, L.P.
- -------------------------------------------------------------------------------
 2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP               (a)  / /
                                                                     (b)  /X/
- -------------------------------------------------------------------------------
 3.   SEC USE ONLY
- -------------------------------------------------------------------------------
 4.   SOURCE OF FUNDS

           00
- -------------------------------------------------------------------------------
 5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS                          
      REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                            / /
- -------------------------------------------------------------------------------
 6.   CITIZENSHIP OR PLACE OF ORGANIZATION

           Illinois, United States of America
- -------------------------------------------------------------------------------

      NUMBER OF SHARES       7.   SOLE VOTING POWER - 701,000
 BENEFICIALLY OWNED BY EACH  --------------------------------------------------
    REPORTING PERSON WITH    8.   SHARED VOTING POWER - 0
                             --------------------------------------------------
                             9.   SOLE DISPOSITIVE POWER - 701,000
                             --------------------------------------------------
                             10.  SHARED DISPOSITIVE POWER - 0
- -------------------------------------------------------------------------------
 11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           701,000 Common Units of Prime Retail, L.P., a Delaware limited
           partnership ("Common Units"), which Common Units are exchangeable on
           a one for one basis for Common Stock of the Issuer, $0.01 par value
           per share, at any time or, at the Issuer's election, cash of
           equivalent value.
- -------------------------------------------------------------------------------
 12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / /
- -------------------------------------------------------------------------------
 13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 

           Approximately 1.6% equity interest in the Issuer, assuming exchange
           of the Common Units.
- -------------------------------------------------------------------------------
 14.  TYPE OF REPORTING PERSON - PN
- -------------------------------------------------------------------------------


                                    11

<PAGE>

                                    SCHEDULE 13D


 CUSIP No.  741570105

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

 1.   NAME OF REPORTING PERSON
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Prime Group VI, L.P.
- -------------------------------------------------------------------------------
 2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP               (a)  / /
                                                                     (b)  /X/
- -------------------------------------------------------------------------------
 3.   SEC USE ONLY
- -------------------------------------------------------------------------------
 4.   SOURCE OF FUNDS

           00
- -------------------------------------------------------------------------------
 5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS                          
      REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                             / /
- -------------------------------------------------------------------------------
 6.   CITIZENSHIP OR PLACE OF ORGANIZATION

           Illinois, United States of America
- -------------------------------------------------------------------------------

      NUMBER OF SHARES       7.   SOLE VOTING POWER - 104,632
 BENEFICIALLY OWNED BY EACH  --------------------------------------------------
    REPORTING PERSON WITH    8.   SHARED VOTING POWER - 0
                             --------------------------------------------------
                             9.   SOLE DISPOSITIVE POWER - 104,632
                             --------------------------------------------------
                             10.  SHARED DISPOSITIVE POWER - 0
- -------------------------------------------------------------------------------

 11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           104,632 Common Units of Prime Retail, L.P., a Delaware limited
           partnership ("Common Units"), which Common Units are exchangeable on
           a one for one basis for Common Stock of the Issuer, $0.01 par value
           per share, at any time or, at the Issuer's election, cash of
           equivalent value.
- -------------------------------------------------------------------------------
 12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / /
- -------------------------------------------------------------------------------
 13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 

           Approximately 0.2% equity interest in the Issuer, assuming exchange
           of the Common Units.
- -------------------------------------------------------------------------------
 14.  TYPE OF REPORTING PERSON - PN
- -------------------------------------------------------------------------------


                                    12

<PAGE>

ITEM 1.   SECURITY AND ISSUER.

          This Schedule 13D relates to shares of Common Stock, par value 
$0.01 per share ("Common Stock"), of Prime Retail, Inc., a Maryland 
corporation (the "Company").   The principal executive offices of the Company 
are located at 100 East Pratt Street, Nineteenth Floor, Baltimore, Maryland 
21202.

ITEM 2.   IDENTITY AND BACKGROUND.

          (a) and (f).  This Schedule 13D is filed by each of Michael W. 
Reschke, an individual and a citizen of the United States of America 
("Reschke"); PGLP, Inc., an Illinois corporation ("PGLPI"); Prime Finance, 
Inc., an Illinois corporation ("Prime Finance"); Prime Group Limited 
Partnership, an Illinois limited partnership ("PGLP"); Prime Financing 
Limited Partnership, an Illinois limited partnership ("PFLP");  Prime Group 
II, L.P., an Illinois limited partnership ("PG-II"); Prime Group IV, L.P., an 
Illinois limited partnership ("PG-IV"); Prime Group V, L.P., an Illinois 
limited partnership ("PG-V"); and Prime Group VI, L.P., an Illinois limited 
partnership ("PG-VI").

          Reschke (i) is the managing general partner of PGLP; (ii) owns an 
approximate 50.75%  equity interest in PGLPI, which is the managing general 
partner of PG-II, PG-IV, PG-V; and PG-VI and (iii) owns an approximate 50.75% 
equity interest in Prime International, Inc., which owns all of the issued 
and outstanding stock of Prime Finance, which is the managing general partner 
of PFLP.

          (b)(i)    The business address of each of Reschke, PGLPI, Prime 
Finance, PGLP, PFLP, PG-II, PG-IV, PG-V and PG-VI is:

               77 West Wacker Drive
               Suite 4200
               Chicago, Illinois 60601

          (ii) Unless otherwise indicated in paragraph (c)(iii) of this Item 
2, the business address of each person listed in paragraph (c)(iii) of this 
Item 2 is:

               77 West Wacker Drive
               Suite 4200
               Chicago, Illinois 60601

          (c)(i)    Reschke is the Chairman, President and Chief Executive 
Officer of The Prime Group, Inc., an Illinois corporation ("PGI"), the 
President and a member of the Board of Directors of PGLPI and Prime Finance 
and the Chairman of the Board of Trustees and a member of the Board of 
Trustees of Prime Group Realty Trust, a publicly traded real estate 
investment trust ("PGRT"). Reschke is also the Chairman of the Board of 
Directors of each of the Company, a publicly traded corporation which 
qualifies for treatment as a real estate investment trust engaged in the 
ownership, development and management of factory outlet centers, and 
Brookdale Living Communities, Inc., a publicly traded Delaware corporation 
involved in the ownership, development and operation of senior independent 
assisted living facilities and a member of the Board of Directors of Horizon 
Group Properties, Inc., a publicly traded corporation which qualifies for 
treatment as a real estate investment trust involved in the ownership, 
development and management of factory outlet centers. The principal business 
of PGI and PGLPI is the ownership, development and management of, and 
investment in, directly or indirectly, real estate. The principal business of 
PGRT is the acquisition, development, finance, construction, leasing, 
marketing, renovation and property management of office and industrial 
properties. 

          (ii)      The principal business of each of PGLPI, Prime Finance, 
PGLP, PFLP, PG-II, PG-IV,  PG-V and PG-VI is the ownership, development and 
management of, and investment in, directly or indirectly, real estate.

          (iii)     The following table sets forth the name and the principal 
occupation  or employment of each director and executive officer (except 
Reschke (see paragraph (c)(i) of this Item 2)) of PGLPI and Prime Finance:

<TABLE>
<CAPTION>
 Name                           Present Principal Occupation or Employment
 ----                           ------------------------------------------
<S>                             <C>
 Robert J. Rudnik (A)(B). . .   Executive Vice President/General Counsel and
                                Secretary of PGI; Vice President and Secretary
                                of PGLPI and Prime Finance; Executive Vice
                                President, General Counsel and Secretary of
                                Brookdale Living Communities, Inc.
</TABLE>

                                    13

<PAGE>

<TABLE>
<CAPTION>
 Name                           Present Principal Occupation or Employment
 ----                           ------------------------------------------
<S>                             <C>
 Gary J. Skoien. . . . . . . .  Executive Vice President of PGI; Vice President
                                of PGLPI and Prime Finance; President, Chief
                                Executive Officer and Chairman of Horizon Group
                                Properties, Inc.

 Ray R. Grinvalds. . . . . . .  Senior Vice President/Asset and Development
                                Management of PGI; Vice President and Treasurer
                                of PGLPI

 Warren H. John (B). . . . . .  Vice President of PGI; Vice President and
                                Assistant Secretary of PGLPI

 Mark K. Cynkar. . . . . . . .  Senior Vice President and Chief Financial
                                Officer of PGI; Vice President of PGLPI and
 --------------                 Prime Finance
</TABLE>
 (A) Director of Prime Finance
 (B) Director of PGLPI

          All of the executive officers and directors of PGLPI and Prime 
Finance are citizens of the United States of America.

          (d) and (e)  During the last five years, none of Reschke nor any of 
the executive officers of PGLPI or Prime Finance (i) has been convicted in a 
criminal proceeding (excluding traffic violations or similar misdemeanors) or 
(ii) was a party to a civil proceeding of a judicial or administrative body 
of competent jurisdiction and as a result of such proceeding was or is 
subject to a judgment, decree or final order enjoining future violations of, 
or prohibiting or mandating activities subject to, federal or state 
securities laws or finding any violation with respect to such laws.

ITEM 3.   SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

          Pursuant to an Agreement and Plan of Merger, dated as of 
February 1, 1998, by and among Prime Retail, Inc. ("Old Prime"), Prime 
Retail, L.P., Horizon Group, Inc., Sky Merger Corp., Horizon Group 
Properties, Inc., Horizon Group Properties, L.P. and Horizon/Glen Outlet 
Centers Limited Partnership  (the "Merger Agreement"), the shares of Common 
Stock of Old Prime owned by Reschke and PGLP were automatically converted 
into the same number of shares of Common Stock of the Company upon 
consummation of the transactions contemplated by the Merger Agreement.

          PGLP, PFLP, PG-II, Prime Group III, L.P., an Illinois limited 
partnership ("PG-III"), PG-IV and PG-V held, prior to the transactions 
contemplated by the Merger Agreement, Common Units of Prime Retail, L.P., a 
Delaware limited partnership ("Common Units"), which Common Units are 
exchangeable on a one for one basis for Common Stock of the Company, $0.01 
par value per share, at any time (or, at the Company's election, cash of 
equivalent value).  PFLP, PG-II, PG-IV, PG-V and PG-VI continue to hold such 
Common Units.

          On September 9, 1998, 38,916 Common Units were transferred from 
PG-IV to PG-II.

          On December 18, 1998, The Northern Trust Company released the 
pledge on the 43,000 Common Units pledged by PGLP pursuant to a Pledge and 
Security Agreement, dated as of October 1, 1996, by and between The Northern 
Trust Company and PGLP.

          On December 18, 1998, The Northern Trust Company released the 
pledge on the 61,632 Common Units pledged by PG-III pursuant to a Pledge and 
Security Agreement, dated as of October 1, 1996, by and between The Northern 
Trust Company and PG-III.

          On December 18, 1998, 43,000 Common Units were transferred from 
PGLP to PG-VI.

          On December 18, 1998, 61,632 Common Units were transferred from 
PG-III to PG-II and then to PG-VI.

ITEM 4.   PURPOSE OF TRANSACTION.

           Reschke and PGLP own shares of Common Stock and PFLP, PG-II, 
PG-IV, PG-V and PG-VI own Common Units and intend to hold such securities for 
investment purposes.


                                    14

<PAGE>

          None of Reschke, PGLPI, Prime Finance, PGLP, PFLP, PG-II, PG-IV, 
PG-V or PG-VI has any current plans or proposals which relate to or would 
result in the types of transactions set forth in paragraphs (a) through (j) 
of the instructions for this Item 4.

ITEM 5.   INTEREST IN SECURITIES OF THE ISSUER.

          (a)  Reschke beneficially owns 152,717 shares of Common Stock, 
9,552 shares of Preferred Stock and certain options to purchase 374,999 
shares of Common Stock which, assuming conversion of the Preferred Stock and 
exercise of all vested options, constitute approximately 1.3% of the total 
outstanding shares of Common Stock.  PGLP beneficially owns 250,000 shares of 
Common Stock which constitute approximately 0.6% of the outstanding shares of 
Common Stock. PFLP beneficially owns 5,557,000 Common Units which, assuming 
exchange of the Common Units, constitute approximately 11.5% of the 
outstanding shares of Common Stock.  PG-II beneficially owns 884,541 Common 
Units which, assuming exchange of the Common Units, constitute approximately 
2.0% of the outstanding shares of Common Stock.   PG-IV beneficially owns 
97,456 Common Units which, assuming exchange of the Common Units, constitute 
approximately 0.2% of the outstanding shares of Common Stock.  PG-V 
beneficially owns 701,000 Common Units which, assuming exchange of the Common 
Units, constitute approximately 1.6% of the outstanding shares of Common 
Stock.  PG-VI beneficially owns 104,632 Common Units which, assuming exchange 
of the Common Units, constitute approximately 0.2% of the outstanding shares 
of Common Stock.

          By  virtue of his position as managing general partner of PGLP and 
his ability to control PGLPI, Prime Finance, PFLP, PG-II, PG-IV, PG-V, and 
PG-VI, Reschke may be deemed to share beneficial ownership of the 250,000 
shares of Common Stock directly owned by PGLP and the 5,557,000, 884,541, 
97,456, 701,000 and 104,632 Common Units owned by PFLP, PG-II, PG-IV,  PG-V 
and PG-VI, respectively.  Prime Finance may be deemed to share beneficial 
ownership of the 5,557,000  Common Units directly owned by PFLP because Prime 
Finance is the managing general partner of PFLP.  PGLPI may be deemed to 
share beneficial ownership of the 884,541, 97,456, 701,000 and 104,632 Common 
Units directly owned by PG-II, PG-IV, PG-V and PG-VI, respectively, because 
PGLPI is the managing general partner of each of PG-II, PG-IV, PG-V and 
PG-VI.  

          (b)  Reschke has the sole power to direct the vote and disposition 
of 152,717 shares of Common Stock and 9,552 shares of Preferred Stock 
directly owned by Reschke.   PGLP has the sole power to direct the vote and 
disposition of the 250,000 shares of Common Stock directly owned by PGLP.  
PFLP has the sole power to direct the vote and disposition of the 5,557,000 
Common Units owned by PFLP.  Each of  PG-II, PG-IV, PG-V and PG-VI has the 
sole power to direct the vote and disposition of the 884,541, 97,456, 701,000 
and 104,632 Common Units directly owned by PG-II, PG-IV, PG-V and PG-VI, 
respectively.  

          By  virtue of his position as managing general partner of PGLP and 
his ability to control PGLPI, Prime Finance, PFLP, PG-II, PG-IV, PG-V and 
PG-VI, Reschke may be deemed to share the power to direct the vote and 
disposition of the 250,000 shares of Common Stock directly owned by PGLP and 
the 5,557,000, 884,541, 97,456, 701,000 and 104,632 Common Units owned by 
PFLP, PG-II, PG-IV, PG-V and PG-VI, respectively.  Prime Finance may be 
deemed to share the power to direct the vote and disposition of the 5,557,000 
Common Units directly owned by PFLP because Prime Finance is the managing 
general partner of PFLP.  PGLPI may be deemed to share the power to direct 
the vote and disposition of the 884,541, 97,456, 701,000 and 104,632 Common 
Units directly owned by PG-II, PG-IV, PG-V and PG-VI, respectively, because 
PGLPI is the managing general partner of each of PG-II, PG-IV, PG-V and 
PG-VI.   

          (c)  On December 18, 1998, (i) PGLP transferred 43,000 Common Units 
to PG-VI as a contribution to the capital of PG-VI and (ii) PG-III 
distributed to PG-II 61,632 Common Units, and PG-II transferred 61,632 Common 
Units to PG-VI as a contribution to the capital of PG-VI.  Other than as 
described above, none of Reschke, PGLP, PFLP, PG-II, PG-IV, PG-V or PG-VI, 
nor, to the best of their knowledge, any of the executive officers or 
directors of PGLPI or Prime Finance, has effected any transaction in 
securities of the Company during the past 60 days.

          (d)  Other than the following, no person is known to have the right 
to receive or the power to direct the receipt of dividends from, or the 
proceeds from the sale of, securities held by Reschke, PGLP, PFLP, PG-II, 
PG-IV, PG-V or PG-VI, except for Reschke, PGLP, PFLP, PG-II, PG-IV, PG-V, 
PG-VI, PGLPI or Prime Finance:

          (1)  First Boston Mortgage Capital Corporation, pursuant to a 
Pledge and Security Agreement dated as of June 14, 1996, as amended, by and 
between PFLP and  Bankers Trust Company;

          (2)  Kemper Investors Life Insurance Company ("Kemper"), pursuant 
to a Pledge and Security Agreement dated as of March 22, 1994, as amended, by 
and between PG-II and Kemper;


                                    15

<PAGE>

          (3)  Lumbermens Mutual Casualty Company ("LMCC"), pursuant to a 
Pledge and Security Agreement dated as of March 22, 1994, as amended, by and 
between PG-V and LMCC; and
 
          (4)  LaSalle National Bank, a national banking association 
("LaSalle"), pursuant to the terms and conditions of a Pledge Agreement, 
dated as of December 18, 1998, by and between PG-VI and LaSalle (the "Pledge 
Agreement");

          (e)  Not applicable.

ITEM 6.   CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH 
RESPECT TO SECURITIES OF THE ISSUER. 

           Pursuant to a Pledge and Security Agreement dated as of June 14, 
1996, as amended, by and between PFLP and  Bankers Trust Company,  PFLP 
pledged 5,557,000 Common Units as security for borrowings pursuant to a 
Credit Agreement by and between PFLP and First Boston Mortgage Capital 
Corporation dated as of even date therewith.

          Pursuant to a Pledge and Security Agreement dated as of March 22, 
1994, as amended, by and between PG-II and Kemper, PG-II pledged 739,333 
Common Units to secure certain obligations relating to the obligations of 
PG-II under a guaranty issued by PG-II with respect to credit support issued  
by Kemper to an affiliate of PG-II.  On September 9, 1998, PG-II pledged an 
additional 145,208 Common Units to secure such obligations.

          Pursuant to a Pledge and Security Agreement dated as of March 22, 
1994, as amended, by and between PG-V and LMCC, PG-V pledged 598,346 Common 
Units as security for the obligations of PG-V to LMCC under a guaranty issued 
by PG-V with respect to credit support issued by LMCC to an affiliate of PG-V.

          Pursuant to the terms and conditions of the Pledge Agreement, PG-VI 
pledged 104,632 Common Units (along with other collateral) to LaSalle, in 
order to secure its obligations under that certain Loan Agreement, dated as 
of December 18, 1998, by and between PG-VI and LaSalle (the "Loan 
Agreement"), as amended by the First Amendment to Loan Documents, Consent and 
Limited Release, dated January 29, 1999 (the "First Amendment").  In 
addition, PGI guaranteed the payment in full of PG-VI's obligations under the 
Loan Agreement pursuant to a Continuing Unconditional Guaranty made in favor 
of LaSalle, dated as of December 18, 1998 (the "Continuing Unconditional 
Guaranty").  The Loan Agreement, the First Amendment, the Pledge Agreement 
and the Continuing Unconditional Guaranty are attached hereto as Exhibits I, 
II, III and IV, respectively.
          
ITEM 7.   MATERIAL TO BE FILED AS EXHIBITS.

<TABLE>
<CAPTION>
          <S>            <C>
          Exhibit I      Loan Agreement, dated as of December 18, 1998, by and
                         between PG-VI and LaSalle

          Exhibit II     First Amendment to Loan Documents, Consent and Limited
                         Release, dated as of January 29, 1999, by and between
                         PG-VI and LaSalle

          Exhibit III    Pledge Agreement, dated as of December 18, 1998, by and
                         between PG-VI and LaSalle

          Exhibit IV     Continuing Unconditional Guaranty, dated as of 
                         December 18, 1998, by PGI in favor of LaSalle
</TABLE>

                                    16

<PAGE>

                                      SIGNATURE


          After reasonable inquiry and to the best of his or its knowledge 
and belief, the undersigned certifies that the information set forth in this 
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              

                              /s/ Michael W. Reschke 
                              -----------------------------
                              Michael W. Reschke


                              Dated: February 25, 1999


<PAGE>

                                     SIGNATURE


          After reasonable inquiry and to the best of his or its knowledge 
and belief, the undersigned certifies that the information set forth in this 
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              PGLP, INC.


                              By:     /s/ Michael W. Reschke
                                   -------------------------
                              Name:   Michael W. Reschke
                              Title:  President


                              Dated: February 25, 1999


<PAGE>

                                     SIGNATURE


          After reasonable inquiry and to the best of his or its knowledge 
and belief, the undersigned certifies that the information set forth in this 
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              PRIME FINANCE, INC.


                              By:    /s/ Michael W. Reschke
                                    -----------------------
                              Name:  Michael W. Reschke
                              Title: President


                              Dated: February 25, 1999

<PAGE>

                                     SIGNATURE


          After reasonable inquiry and to the best of his or its knowledge 
and belief, the undersigned certifies that the information set forth in this 
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              PRIME GROUP LIMITED PARTNERSHIP

                              By:    /s/ Michael W. Reschke
                                    -------------------------
                              Name:  Michael W. Reschke
                              Title: Managing General Partner


                              Dated: February 25, 1999

<PAGE>

                                     SIGNATURE


          After reasonable inquiry and to the best of his or its knowledge 
and belief, the undersigned certifies that the information set forth in this 
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              PRIME FINANCING LIMITED PARTNERSHIP
                              By: Prime Finance, Inc., its managing general
                              partner


                              By:    /s/ Michael W. Reschke 
                                    ---------------------------
                              Name:  Michael W. Reschke
                              Title: President


                              Dated: February 25, 1999

<PAGE>

                                   SIGNATURE


          After reasonable inquiry and to the best of his or its knowledge 
and belief, the undersigned certifies that the information set forth in this 
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              PRIME GROUP II, L.P.
                              By:  PGLP, Inc., its managing general partner


                              By:    /s/ Michael W. Reschke 
                                    -------------------------
                              Name:  Michael W. Reschke
                              Title: President


                              Dated: February 25, 1999

<PAGE>

                                     SIGNATURE


          After reasonable inquiry and to the best of his or its knowledge 
and belief, the undersigned certifies that the information set forth in this 
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              PRIME GROUP IV, L.P.
                              By:  PGLP, Inc., its managing general partner


                              By:    /s/ Michael W. Reschke 
                                    -------------------------
                              Name:  Michael W. Reschke
                              Title: President


                              Dated: February 25, 1999


<PAGE>

                                     SIGNATURE


          After reasonable inquiry and to the best of his or its knowledge 
and belief, the undersigned certifies that the information set forth in this 
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              PRIME GROUP V, L.P.
                              By:  PGLP, Inc., its managing general partner


                              By:    /s/ Michael W. Reschke 
                                    --------------------------
                              Name:  Michael W. Reschke
                              Title: President


                              Dated: February 25, 1999


<PAGE>

                                     SIGNATURE


          After reasonable inquiry and to the best of his or its knowledge 
and belief, the undersigned certifies that the information set forth in this 
Amendment No. 1 to Schedule 13D is true, complete and correct.

                              PRIME GROUP VI, L.P.
                              By:  PGLP, Inc., its managing general partner


                              By:    /s/ Michael W. Reschke 
                                    ------------------------------
                              Name:  Michael W. Reschke
                              Title: President


                              Dated: February 25, 1999

<PAGE>


                                    EXHIBIT INDEX
<TABLE>
<CAPTION>

Exhibit No.              Description
- -----------              -----------
<S>                      <C>
Exhibit I                Loan Agreement, dated as of December 18, 1998, by and
                         between PG-VI and LaSalle

Exhibit II               First Amendment to Loan Documents, Consent and Limited
                         Release, dated as of January 29, 1999, by and between
                         PG-VI and LaSalle

Exhibit III              Pledge Agreement, dated as of December 18, 1998, by and
                         between PG-VI and LaSalle

Exhibit IV               Continuing Unconditional Guaranty, dated as of 
                         December 18, 1998, by PGI in favor of LaSalle
</TABLE>

<PAGE>


                                    LOAN AGREEMENT
                                           
                                           
                                           
                                       BETWEEN
                                           
                                           
                                PRIME GROUP VI, L.P.,
                           an Illinois limited partnership
                                           
                                         AND
                                           
                                           
                                LASALLE NATIONAL BANK,
                            a national banking association

<PAGE>

                                  TABLE OF CONTENTS

<TABLE>
<CAPTION>
<S>                                                                           <C>
ARTICLE 1  DEFINITIONS AND DETERMINATIONS. . . . . . . . . . . . . . . . . . . 1
     1.1    DEFINITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
     1.2    TIME PERIODS . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
     1.3    ACCOUNTING TERMS . . . . . . . . . . . . . . . . . . . . . . . . . 7
     1.4    REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
     1.5    LENDER'S DISCRETION. . . . . . . . . . . . . . . . . . . . . . . . 7
     1.6    BORROWER'S KNOWLEDGE . . . . . . . . . . . . . . . . . . . . . . . 7
     1.7    MARKET PRICE ADJUSTMENTS.. . . . . . . . . . . . . . . . . . . . . 8

ARTICLE 2  LOAN AND TERMS OF PAYMENT . . . . . . . . . . . . . . . . . . . . . 8
     2.1    REVOLVING LOAN . . . . . . . . . . . . . . . . . . . . . . . . . . 8
     2.1.1  AMOUNT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
     2.1.2  PROCEDURE FOR BORROWING. . . . . . . . . . . . . . . . . . . . . . 8
     2.2    DISBURSEMENT OF LOAN ON CLOSING DATE . . . . . . . . . . . . . . . 8
     2.3    INTEREST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
     2.3.1  INTEREST RATE. . . . . . . . . . . . . . . . . . . . . . . . . . . 9
     2.3.2  INTEREST PAYMENTS. . . . . . . . . . . . . . . . . . . . . . . . . 9
     2.3.3  INTEREST COMPUTATION . . . . . . . . . . . . . . . . . . . . . . . 9
     2.3.4  MAXIMUM INTEREST . . . . . . . . . . . . . . . . . . . . . . . . . 9
     2.4    PRINCIPAL PAYMENTS . . . . . . . . . . . . . . . . . . . . . . . . 9
     2.5    PREPAYMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
     2.5.1  VOLUNTARY PREPAYMENT . . . . . . . . . . . . . . . . . . . . . . . 9
     2.5.2  MANDATORY PREPAYMENT . . . . . . . . . . . . . . . . . . . . . . . 10
     2.6    LIBOR OPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     2.6.1  OPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     2.6.2  NOTICE PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . 10
     2.6.3  NOTICE IRREVOCABLE . . . . . . . . . . . . . . . . . . . . . . . . 11
     2.6.4  FAILURE TO PROVIDE NOTICE OF CONTINUATION. . . . . . . . . . . . . 11
     2.7    INTEREST PERIODS . . . . . . . . . . . . . . . . . . . . . . . . . 11
     2.8    SPECIAL PROVISIONS GOVERNING LIBOR LOANS . . . . . . . . . . . . . 11
     2.8.1  DETERMINATION OF INTEREST RATE . . . . . . . . . . . . . . . . . . 11
     2.8.2  INTEREST RATE UNASCERTAINABLE, INADEQUATE OR UNFAIR. . . . . . . . 12
     2.9    ILLEGALITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
     2.10   COMPENSATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
     2.11   LIBOR RATE TAXES . . . . . . . . . . . . . . . . . . . . . . . . . 13
     2.11.1 ADDITIONAL PAYMENTS. . . . . . . . . . . . . . . . . . . . . . . . 13
     2.11.2 INDEMNITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     2.12   DEFAULT RATE . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     2.13   METHOD OF PAYMENT; GOOD FUNDS. . . . . . . . . . . . . . . . . . . 13
     2.14   DEPOSIT TO BORROWER'S ACCOUNT. . . . . . . . . . . . . . . . . . . 13

ARTICLE 3  NOTE AND SECURITY . . . . . . . . . . . . . . . . . . . . . . . . . 13
     3.1    NOTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     3.2    SECURITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

ARTICLE 4  CONDITIONS OF FUNDING . . . . . . . . . . . . . . . . . . . . . . . 14
     4.1    INITIAL ADVANCE. . . . . . . . . . . . . . . . . . . . . . . . . . 14
</TABLE>
                                       -i-

<PAGE>
<TABLE>
<CAPTION>
<S>                                                                           <C>
     4.2    ALL REVOLVER ADVANCES. . . . . . . . . . . . . . . . . . . . . . . 16
     4.2.1  REPRESENTATIONS AND WARRANTIES . . . . . . . . . . . . . . . . . . 16
     4.2.2  PERFORMANCE; NO DEFAULT. . . . . . . . . . . . . . . . . . . . . . 16

ARTICLE 5  REPRESENTATIONS AND WARRANTIES. . . . . . . . . . . . . . . . . . . 16
     5.1    BORROWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     5.2    PARTNERS OF BORROWER . . . . . . . . . . . . . . . . . . . . . . . 16
     5.3    AUTHORITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
     5.4    NECESSARY ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . 17
     5.5    BINDING AGREEMENTS . . . . . . . . . . . . . . . . . . . . . . . . 17
     5.6    BORROWER'S SECURITIES. . . . . . . . . . . . . . . . . . . . . . . 17
     5.7    TITLE TO PROPERTY; LIENS . . . . . . . . . . . . . . . . . . . . . 17
     5.8    FINANCIAL STATEMENTS . . . . . . . . . . . . . . . . . . . . . . . 17
     5.9    LITIGATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
     5.10   CONFLICTING AGREEMENTS . . . . . . . . . . . . . . . . . . . . . . 17
     5.11   COMPLIANCE WITH APPLICABLE LAWS. . . . . . . . . . . . . . . . . . 18
     5.12   APPLICATION OF CERTAIN LAWS AND REGULATIONS. . . . . . . . . . . . 18
     5.12.1 INVESTMENT COMPANY ACT . . . . . . . . . . . . . . . . . . . . . . 18
     5.12.2 HOLDING COMPANY ACT. . . . . . . . . . . . . . . . . . . . . . . . 18
     5.13   MARGIN REGULATIONS . . . . . . . . . . . . . . . . . . . . . . . . 18
     5.14   NO MISREPRESENTATION . . . . . . . . . . . . . . . . . . . . . . . 18
     5.15   NO AFFILIATION . . . . . . . . . . . . . . . . . . . . . . . . . . 19
     5.16   REGISTRATION EFFECTIVE . . . . . . . . . . . . . . . . . . . . . . 19

ARTICLE 6  AFFIRMATIVE COVENANTS . . . . . . . . . . . . . . . . . . . . . . . 19
     6.1    LEGAL EXISTENCE; GOOD STANDING . . . . . . . . . . . . . . . . . . 19
     6.2    INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
     6.3    FINANCIAL STATEMENTS AND OTHER INFORMATION OF BORROWER . . . . . . 19
     6.3.1  ANNUAL STATEMENTS. . . . . . . . . . . . . . . . . . . . . . . . . 19
     6.3.2  NOTICE OF DEFAULTS; LOSS . . . . . . . . . . . . . . . . . . . . . 20
     6.3.3  NOTICE OF SUITS, ADVERSE EVENTS. . . . . . . . . . . . . . . . . . 20
     6.3.4  COVENANT COMPLIANCE CERTIFICATE; BORROWING BASE CERTIFICATE. . . . 20
     6.3.5  OTHER INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . 21
     6.4    FINANCIAL INFORMATION OF PRIME RETAIL, INC. AND PGRT . . . . . . . 21
     6.5    REPORTS TO GOVERNMENTAL BODIES AND OTHER PERSONS . . . . . . . . . 21
     6.6    GENERAL PARTNER. . . . . . . . . . . . . . . . . . . . . . . . . . 21
     6.7    FINANCIAL STATEMENTS OF GUARANTOR. . . . . . . . . . . . . . . . . 22

ARTICLE 7  NEGATIVE COVENANTS. . . . . . . . . . . . . . . . . . . . . . . . . 22

ARTICLE 8  DEFAULT AND REMEDIES. . . . . . . . . . . . . . . . . . . . . . . . 22
     8.1    EVENTS OF DEFAULT. . . . . . . . . . . . . . . . . . . . . . . . . 22
     8.1.1  DEFAULT IN PAYMENT . . . . . . . . . . . . . . . . . . . . . . . . 22
     8.1.2  BREACH OF COVENANTS AND CERTAIN OTHER PROVISIONS . . . . . . . . . 23
     8.1.3  BREACH OF WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . 23
     8.1.4  ACCELERATION OF ANY INDEBTEDNESS . . . . . . . . . . . . . . . . . 23
     8.1.5  BANKRUPTCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
     8.1.6  JUDGMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
     8.1.7  NON-PERFORMANCE OF GUARANTY, ETC . . . . . . . . . . . . . . . . . 24
     8.1.8  INVALIDITY OF PLEDGE AGREEMENT, ETC. . . . . . . . . . . . . . . . 24
</TABLE>
                                       -ii-

<PAGE>
<TABLE>
<CAPTION>
<S>                                                                           <C>
     8.2    ACCELERATION OF BORROWER'S OBLIGATIONS . . . . . . . . . . . . . . 25
     8.3    REMEDIES ON DEFAULT. . . . . . . . . . . . . . . . . . . . . . . . 25
     8.3.1  ENFORCEMENT OF SECURITY INTERESTS. . . . . . . . . . . . . . . . . 25
     8.3.2  OTHER REMEDIES . . . . . . . . . . . . . . . . . . . . . . . . . . 25
     8.4    APPLICATION OF FUNDS . . . . . . . . . . . . . . . . . . . . . . . 25
     8.4.1  EXPENSES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
     8.4.2  BORROWER'S OBLIGATIONS . . . . . . . . . . . . . . . . . . . . . . 26
     8.4.3  SURPLUS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

ARTICLE 9  CLOSING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

ARTICLE 10 EXPENSES AND INDEMNITY. . . . . . . . . . . . . . . . . . . . . . . 26
     10.1   CLOSING FEE. . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
     10.2   ATTORNEY'S FEES AND OTHER FEES AND EXPENSES. . . . . . . . . . . . 26
     10.2.1 FEES AND EXPENSES FOR PREPARATION OF LOAN DOCUMENTS. . . . . . . . 26
     10.2.2 FEES AND EXPENSES IN ENFORCEMENT OF RIGHTS OR DEFENSE OF LOAN
            DOCUMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
     10.3   INDEMNITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
     10.3.1 BROKERAGE FEES . . . . . . . . . . . . . . . . . . . . . . . . . . 27
     10.3.2 OPERATION OF COLLATERAL; JOINT VENTURERS . . . . . . . . . . . . . 27

ARTICLE 11 MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
     11.1   NOTICES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
     11.2   SURVIVAL OF LOAN AGREEMENT . . . . . . . . . . . . . . . . . . . . 28
     11.3   FURTHER ASSURANCE. . . . . . . . . . . . . . . . . . . . . . . . . 28
     11.4   TAXES AND FEES . . . . . . . . . . . . . . . . . . . . . . . . . . 28
     11.5   SEVERABILITY . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
     11.6   WAIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
     11.7   MODIFICATION OF LOAN DOCUMENTS . . . . . . . . . . . . . . . . . . 29
     11.8   CAPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
     11.9   SALE OF INTEREST . . . . . . . . . . . . . . . . . . . . . . . . . 29
     11.10  SUCCESSORS AND ASSIGNS . . . . . . . . . . . . . . . . . . . . . . 29
     11.11  REMEDIES CUMULATIVE. . . . . . . . . . . . . . . . . . . . . . . . 29
     11.12  ENTIRE AGREEMENT . . . . . . . . . . . . . . . . . . . . . . . . . 30
     11.13  APPLICABLE LAW . . . . . . . . . . . . . . . . . . . . . . . . . . 30
     11.14  JURISDICTION AND VENUE . . . . . . . . . . . . . . . . . . . . . . 30
     11.15  WAIVER OF RIGHT TO JURY TRIAL. . . . . . . . . . . . . . . . . . . 30
</TABLE>

                                       -iii-

<PAGE>

                                    LOAN AGREEMENT


     THIS LOAN AGREEMENT is dated as of December 18, 1998, by and between 
PRIME GROUP VI, L.P., an Illinois limited partnership ("Borrower"), and 
LASALLE NATIONAL BANK, a national banking association ("Lender").

                                   R E C I T A L S:

     A.   Borrower desires to obtain a revolving line of credit from Lender 
in the maximum principal amount of $25,000,000 (the "Loan") to refinance 
certain indebtedness and for working capital purposes for Borrower and its 
affiliates. The Loan is to be secured by a lien on certain securities owned 
by Borrower and is to be guaranteed by a limited partner of Borrower.

     B.   Lender is willing to furnish such revolving line of credit subject 
to the terms and conditions set forth herein.

     NOW, THEREFORE, it is agreed as follows:

                                      ARTICLE 1

                            DEFINITIONS AND DETERMINATIONS

     1.1  DEFINITIONS.  As used in this Loan Agreement and in the other Loan 
Documents, unless otherwise expressly indicated herein or therein, the 
following terms shall have the following meanings (such meanings to be 
applicable equally both to the singular and plural terms defined):

          ACCOUNTANTS: Ernst & Young LLP or such other independent certified
     public accounting firm selected by Borrower and reasonably satisfactory to
     Lender.

          AIMCO: Apartment Investment and Management Company, a Maryland
     corporation that qualifies as a real estate investment trust.

          AIMCO SHARES: The common stock, $0.01 par value per share, of AIMCO.

          AVAILABLE BORROWING BASE: the lesser of (i) $25,000,000 and (ii) 50%
     of the Fair Market Value of the Collateral.

          BORROWER'S OBLIGATIONS:  (i) any and all Indebtedness due or to become
     due, now existing or howsoever arising of Borrower to Lender pursuant to
     the terms of this Loan Agreement or pursuant to any other Loan Document,
     and (ii) the performance of the covenants of Borrower contained in the Loan
     Documents.

<PAGE>

          BORROWER'S SECURITIES: See Section 5.6.

          BREAK COSTS: See Section 2.10.

          BROOKDALE: Brookdale Living Communities, Inc., a Delaware corporation.

          BROOKDALE SHARES: the shares of common stock, $0.01 par value per
     share, of Brookdale.

          BUSINESS:  the business of directly or indirectly acquiring,
     developing, operating, managing and financing real estate or interests
     therein, or investing in, or holding securities of, entities engaged in
     such business.

          BUSINESS DAY:  any day other than a Saturday, Sunday or other day on
     which banks in Chicago, Illinois, or London, England, are closed.

          CLOSING:  as defined in Article 9.

          CLOSING DATE:  as defined in Article 9.

          CODE:  the Internal Revenue Code of 1986, as amended, and any
     successor statute thereto, and the rules and regulations issued thereunder,
     as in effect from time to time.

          COLLATERAL:  the securities, cash and other property in which Lender
     is granted the Security Interests pursuant to the Pledge Agreement.

          COMMITMENT: $25,000,000.

          DEFAULT:  any event or condition which, with the giving of notice or
     the lapse of time, or both, would become an Event of Default.

          DEFAULT RATE: 3% plus the Floating Rate applicable from time to time
     to the outstanding principal balance of the Loan.

          DEFAULT PERIOD:  a period of time commencing on the date that an Event
     of Default has occurred and ending on the date that such Event of Default
     is cured or waived.

          EVENT OF DEFAULT:  any of the Events of Default set forth in Section
     8.1.

          EXCHANGE ACT: the Securities Exchange Act of 1934, as amended.

          FAIR MARKET VALUE OF THE COLLATERAL: as of any date the same is to be
     calculated, (i) as to the Prime Retail Partnership Units, the product of
     the Market Price of Prime Retail, Inc. Shares for such date multiplied by
     the number of Prime Retail Inc. Shares into which the Prime Retail
     Partnership Units may be converted, (ii) as to the Prime Group Realty

                                       2

<PAGE>

     Partnership Units, the product of the Market Price of PGRT Shares for such
     date multiplied by the number of PGRT Shares into which the Prime Group
     Realty Partnership Units may be converted, (iii) as to the Brookdale
     Shares, the Market Price of the Brookdale Shares multiplied by the number
     of Brookdale Shares, and (iv) as to the AIMCO Shares, the Market Price of
     the AIMCO Shares multiplied by the number of AIMCO Shares.

          FIXED RATE: for any Interest Period, a fixed interest rate per annum,
     which rate shall be equal to the LIBOR Rate applicable to such Interest
     Period plus 2.50%.

          FLOATING RATE: 1/2% + the Prime Rate in effect from time to time.  The
     Floating Rate shall change automatically and immediately as and when the
     Prime Rate shall change, without notice to Borrower.

          GAAP:  generally accepted accounting principles as in effect from time
     to time, which shall include the official interpretations thereof by the
     Financial Accounting Standards Board, consistently applied.

          GOOD FUNDS:  United States Dollars available to Lender in federal
     funds at or before 1:00 p.m. Chicago time on a Business Day.

          GOVERNMENTAL BODY:  any foreign, federal, state, municipal or other
     government, or any department, commission, board, bureau, agency, public
     authority or instrumentality thereof or any court or arbitrator.

          GUARANTOR: The Prime Group.

          GUARANTY:  the Continuing Unconditional Guaranty, substantially in the
     form of Exhibit A, issued by Guarantor.

          INDEBTEDNESS: all liabilities, obligations and reserves, contingent or
     otherwise, which, in accordance with GAAP, would be reflected as a
     liability on a balance sheet, including, without duplication:  (i) all
     Indebtedness for Borrowed Money, (ii) all obligations under conditional
     sales or other title retention agreements, (iii) all obligations secured by
     any Lien upon Property, (iv) all guaranties and other contingent
     obligations, including, without limitation, letters of credit, and (v) all
     obligations under operating leases.

          INDEBTEDNESS FOR BORROWED MONEY:  without duplication, all
     Indebtedness (i) in respect of money borrowed, (ii) evidenced by a note,
     debenture or other like written obligation to pay money, including, without
     limitation, all of Borrower's Obligations, (iii) in respect of rent or hire
     of Property under capitalized leases or for the deferred purchase price of
     Property or (iv) in respect of obligations under conditional sales or other
     title retention agreements, and all guaranties of any and all of the
     foregoing.

                                       3

<PAGE>

          INTEREST PERIOD: as defined in Section 2.7.

          INTEREST RATE DETERMINATION DATE: the date on which Lender determines
     the Fixed Rate applicable to a requested LIBOR Loan or the continuation
     thereof, which shall be the second Business Day prior to the first day of
     the Interest Period applicable to such LIBOR Loan.

          LIBOR LOAN: each portion of the Loan that is bearing interest at an
     applicable Fixed Rate.

          LIBOR RATE: with respect to any LIBOR Loan for the applicable Interest
     Period, the per annum rate of interest equal to the quotient obtained by
     dividing (i) the average per annum interest rate at which deposits in
     United States dollars are generally offered in the London Interbank Market
     at 11:00 a.m. London, England time, on the Interest Rate Determination
     Date, for a period equal to such Interest Period and in the amount of such
     LIBOR Loan, by (ii) the difference between 100% and any applicable reserve
     requirements (rounded upward to the nearest whole multiple of 1/100th of
     one percent per annum) including, without limitation, any applicable
     maximum reserve requirements for "Eurocurrency Liabilities" under
     Regulation D of the Board of Governors of the Federal Reserve System (or
     any similar reserves under any successor regulations).

          LIBOR RATE TAXES: as defined in Section 2.11.1.

          LIEN:  any mortgage, pledge, assignment, lien, charge, encumbrance or
     security interest of any kind, or the interest of a vendor or lessor under
     any conditional sale agreement, capitalized lease, or other title retention
     agreement.

          LOAN:  the revolving loan in the maximum principal amount of
     $25,000,000 to be made by Lender from time to time to Borrower in
     accordance with the terms set forth in Section 2.2.

          LOAN AGREEMENT:  this Loan Agreement and any amendments or supplements
     hereto.

          LOAN DOCUMENTS: (i) Loan Agreement, (ii) Note, (iii) Pledge Agreement,
     (iv) Guaranty, (v) appropriate Uniform Commercial Code financing
     statements, and (vi) such other instruments and documents as Lender may
     require to evidence and perfect the Security Interests granted pursuant to
     the Pledge Agreement.

          MARKET PRICE: for any date shall be deemed to be (i) so long as the
     Prime Shares, the AIMCO Shares and the Brookdale Shares are quoted on a
     national securities exchange or the National Association of Securities
     Dealers Automated Quotations ("NASDAQ") National Market System, the
     reported closing sales price per share for such security on such date as
     reported on such national securities exchange or NASDAQ, or, if there were
     no reported sales transactions on that date, the reported closing sales
     price per 

                                       4

<PAGE>

     share for such security for the most recent Business Day (within
     the previous ten Business Days) on which sales transactions are reported,
     or (ii) if there were no reported transactions on a national securities
     exchange or on NASDAQ on that date or within the previous ten Business Days
     or if the Prime Shares and/or AIMCO Shares and/or Brookdale Shares are no
     longer being quoted on a national securities exchange or on NASDAQ, then as
     to those securities, zero.

          MATERIAL ADVERSE EFFECT:  any changes or effects, as the case may be,
     that individually or in the aggregate are or can reasonably be expected to
     be materially adverse to (i) the ability of Borrower or Guarantor, or
     either of them, as the case may be, to fulfill any covenants or to perform
     any of their respective obligations under this Loan Agreement or the other
     Loan Documents, or (ii) the Lender's rights to foreclose on the Collateral
     or convert any of the Partnership Units into any Prime Shares.

          MATURITY DATE:  December 31, 2000 or such earlier date on which the
     Commitment is reduced to zero or otherwise terminated pursuant to the terms
     of this Loan Agreement.

          NOTE:  the Revolving Note, substantially in the form of Exhibit B,
     executed by Borrower to evidence the maximum amount of the Loan.

          PARTNERSHIP UNITS: collectively, Prime Retail Partnership Units and
     the Prime Group Realty Partnership Units.

          PERSON:  any individual, firm, corporation, limited liability company,
     business enterprise, trust, association, joint venture, partnership,
     governmental body or other entity, whether acting in an individual,
     fiduciary or other capacity.

          PGLP, INC.: PGLP, Inc., a Illinois corporation.

          PGRT: Prime Group Realty Trust, a Maryland real estate investment
     trust.

          PGRT SHARES:  shares of common stock, $0.01 par value per share, of
     PGRT.

          PLEDGE AGREEMENT:  the Pledge Agreement, in the form of Exhibit C, by
     and between Borrower and Lender. 

          PRIME GROUP REALTY OPERATING PARTNERSHIP: Prime Group Realty, L.P., a
     Delaware limited partnership.

          PRIME GROUP REALTY PARTNERSHIP UNITS:  units of partnership interest
     in the Prime Group Realty Operating Partnership.

          PRIME GROUP REALTY REGISTRATION RIGHTS AGREEMENT: that certain
     Registration Rights Agreement, dated November 17, 1997, by and among PGRT,
     Prime Group Realty 

                                       5

<PAGE>

     Operating Partnership, Prime Group Limited Partnership, Primestone 
     Investment Partners, L.P., a Delaware limited partnership, and the other
     investors named therein.

          PRIME LOAN: each portion of the Loan that is bearing interest at the
     Floating Rate.

          PRIME RATE: the per annum rate of interest announced or published
     publicly from time to time by Lender at its principal place of business in
     Chicago, Illinois, as its prime or equivalent rate of interest, which rate
     is not necessarily the lowest rate of interest charged by Lender with
     respect to commercial loans.

          PRIME RETAIL, INC.: Prime Retail, Inc., a Maryland corporation that
     has qualified for treatment as a real estate investment trust.

          PRIME RETAIL, INC. REGISTRATION STATEMENT: that certain registration
     statement number 333-65617, relating to 8,505,472 Prime Retail Inc. Shares.

          PRIME RETAIL, INC. SHARES:  shares of common stock, $0.01 par value
     per share, of Prime Retail, Inc.

          PRIME RETAIL OPERATING PARTNERSHIP.: Prime Retail, L.P., a Delaware
     limited partnership.

          PRIME RETAIL PARTNERSHIP UNITS:  units of partnership interest in the
     Prime Retail Operating Partnership.

          PRIME RETAIL REGISTRATION RIGHTS AGREEMENT: that certain Registration
     Rights Agreement, dated June 15, 1998, by and among Prime Retail, Inc.,
     Prime Retail, L.P. and the other investors named therein.

          PRIME SHARES: collectively, Prime Retail, Inc. Shares and PGRT Shares.

          PRINCIPAL BALANCE:  the unpaid principal balance of the Loan
     outstanding from time to time.

          PROPERTY: as to any Person, all types of real, personal or mixed
     property and all types of tangible or intangible property owned by such
     Person.
          
          REVOLVER ADVANCE:  any advance of the Loan made in accordance with the
     terms set forth in Section 2.1.

          SEC: the U.S. Securities and Exchange Commission.

          SECURITY INTERESTS:  the Liens in the Collateral granted to Lender
     pursuant to the Pledge Agreement.

                                       6

<PAGE>

          THE PRIME GROUP: The Prime Group, Inc., an Illinois corporation.
          
     1.2  TIME PERIODS.  In this Loan Agreement and the other Loan Documents, in
the computation of periods of time from a specified date to a later specified
date (i) the word "from" means "from and including", (ii) the words "to" and
"until" each mean "to, but excluding" and (iii) the words "through", "end of"
and "expiration" each mean "through and including".  All references in this Loan
Agreement and the other Loan Documents to "month", "quarter" or "year" shall be
deemed to refer to a calendar month, quarter or year.

     1.3  ACCOUNTING TERMS.  All accounting terms not specifically defined
herein shall be construed, all accounting determinations hereunder shall be made
and all financial statements required to be delivered pursuant hereto shall be
prepared in accordance with GAAP.

     1.4  REFERENCES.  All references in this Loan Agreement to "Article",
"Section", "subsection", "subparagraph", "clause" or "Exhibit", unless otherwise
indicated, shall be deemed to refer to an Article, Section, subsection,
subparagraph, clause or Exhibit, as applicable, of this Loan Agreement.

     1.5  LENDER'S DISCRETION.  Whenever the terms "satisfactory to Lender",
"determined by Lender", "acceptable to Lender", "Lender shall elect", "Lender
shall request" or similar terms are used in this Loan Agreement, except as
otherwise specifically provided in this Loan Agreement, such terms shall mean
satisfactory to, at the election of, determined by, acceptable to or requested
by, as applicable, Lender in its sole and absolute discretion.

     1.6  BORROWER'S KNOWLEDGE.  Any statements, representations or warranties
which are based upon the knowledge of Borrower shall be deemed to have been
limited to the knowledge, made after due inquiry by Michael W. Reschke,
President of PGLP, Inc., the managing general partner of Borrower, and
President, Chairman and Chief Executive Officer of The Prime Group, Inc., and
Mark K. Cynkar, Vice President and Treasurer of PGLP, Inc., the managing general
partner of Borrower and the Senior Vice President and Chief Financial Officer of
The Prime Group, or, if such persons are not then serving Borrower in their
present capacities, their successors., with respect to the matter in question.

     1.7  MARKET PRICE ADJUSTMENTS.  In the event of a stock dividend, stock
split or combination or other reduction in the number of issued and outstanding
Brookdale shares, AIMCO shares and/or Prime Shares, as to such affected
securities, any applicable Market Price per share specified in this Loan
Agreement shall be proportionately and appropriately adjusted to reflect such
dividend, split or combination or other reduction.

                                       7

<PAGE>

                                    ARTICLE 2

                              LOAN AND TERMS OF PAYMENT

     2.1  REVOLVING LOAN.

          2.1.1 AMOUNT.  The Loan is a revolving loan which shall be made
     available to Borrower by Lender from time to time on and after the Closing
     Date in the maximum amount outstanding at any one time in the amount of the
     Commitment; provided, however, that the aggregate principal amount of the
     Loan which shall be outstanding hereunder at any time shall not exceed the
     Available Borrowing Base. Subject to the limitations set forth in this
     Article 2, from the Closing Date through the Maturity Date, Borrower may
     reborrow all or any Revolver Advance which is repaid or prepaid.

          2.1.2 PROCEDURE FOR BORROWING.  Each Revolver Advance shall be made on
     any Business Day by Lender after Borrower has made an irrevocable written
     or telephonic request to Lender for a Revolver Advance, provided, however,
     if such request is received by Lender after 12:00 p.m., Chicago time, on a
     Business Day, such request shall be deemed to have been made on the next
     Business Day.  If such Revolver Advance is to bear interest at the Floating
     Rate, then such Revolver Advance shall be made on the same Business Day as
     the date such request is made or deemed to have been made; if such Revolver
     Advance is to bear interest at the Fixed Rate in accordance with the terms
     of Sections 2.6 and 2.7 below, then such Revolver Advance shall be made on
     the third Business Day following the date such request is made or deemed to
     have been made.  The amount of such Revolver Advance shall not be less than
     $100,000, subject to the additional restrictions set forth in Section 2.1.1
     and Section 2.6.1.  Each request for a Revolver Advance shall be deemed a
     certification by Borrower that no Default or Event of Default exists or
     will be created if the requested Revolver Advance is made.  Lender shall
     not be obligated to make any Revolver Advance if (i) a Default or Event of
     Default exists or will be created if the requested Revolver Advance is
     made, or (ii) after making such Revolver Advance, the outstanding aggregate
     principal amount of the Loan will exceed the Available Borrowing Base at
     such time.

     2.2  DISBURSEMENT OF LOAN ON CLOSING DATE.  Provided (i) no Default or
Event of Default shall be in existence on the Closing Date and (ii) all of the
terms and conditions set forth in Article IV below shall have been satisfied, on
the Closing Date and subject to the provisions of Section 2.1.1 above, Lender
shall advance to Borrower such amount of the Loan as Borrower shall request.
     
     2.3  INTEREST.  Borrower's Obligations shall bear interest computed and
payable as follows:

          2.3.1 INTEREST RATE.  The principal balance of the Loan outstanding
     from time to time shall bear interest at a per annum rate equal to the
     Floating Rate in effect from time to time, subject to the LIBOR option in
     Section 2.6.

                                       8

<PAGE>

          2.3.2 INTEREST PAYMENTS.  Accrued and unpaid interest on the Principal
     Balance of the Loan shall be due and payable monthly in arrears on the
     first Business Day of each month, commencing February 1, 1999; provided,
     however, that accrued and unpaid interest on each LIBOR Loan shall also be
     due and payable in arrears on the last day of the Interest Period
     applicable to such LIBOR Loan.

          2.3.3 INTEREST COMPUTATION.  Interest shall be:  (a) computed on the
     basis of a year consisting of 360 days and (b) payable for the actual
     number of days during the period for which interest is being charged.

          2.3.4 MAXIMUM INTEREST.  Notwithstanding any provision to the contrary
     herein contained, Lender shall not collect a rate of interest on any
     obligation or liability due and owing by Borrower to Lender in excess of
     the maximum contract rate of interest permitted by applicable law. Lender
     and Borrower have agreed that the interest laws of the State of Illinois
     shall govern the relationship between them, but in the event of a final
     adjudication to the contrary, Borrower shall be obligated to pay to Lender
     only such interest as then shall be permitted by the laws of the state
     found to govern the contract relationship between Lender and Borrower.  All
     interest found in excess of that rate of interest allowed and collected by
     Lender shall be applied to the Principal Balance in such manner as to
     prevent the payment and collection of interest in excess of the rate
     permitted by applicable law.

     2.4  PRINCIPAL PAYMENTS.  The outstanding Principal Balance of the Loan
shall be paid in full not later than the Maturity Date.

     2.5  PREPAYMENT.

          2.5.1 VOLUNTARY PREPAYMENT.  All or a portion of the Principal Balance
     of the Loan may be prepaid at any time without premium or penalty, PROVIDED
     that Borrower shall also pay, with such prepayment, all Break Costs
     incurred by Lender, if any.  All prepayments of the Loan pursuant to this
     subsection 2.5.1 shall be accompanied by the payment of any accrued and
     unpaid interest on the portion of the Principal Balance being prepaid to
     the date on which Lender is in receipt of Good Funds, and any other sums
     which are due and payable pursuant to the terms of the Loan Documents.

          2.5.2 MANDATORY PREPAYMENT.  If, as of 3:30 p.m., Chicago time, on any
     Business Day, the outstanding Principal Balance of the Loan exceeds the
     amount of the Available Borrowing Base on such Business Day then, not later
     than 3:00 p.m., Chicago time, on the next Business Day, Borrower shall
     either (i) repay the amount of such excess without notice or demand or
     (ii) pledge to the Lender collateral, cash or cash equivalents (acceptable
     to the Lender) in such amount sufficient to eliminate such excess.  Any
     payment made pursuant to this subsection 2.5.2 shall be accompanied by
     accrued interest on the amount paid through the date on which Lender is in
     receipt of Good Funds and in the case of LIBOR Loans, all Break Costs. 
     Such payment shall first be applied to the Floating Loan and then to the
     LIBOR Loans.

                                       9

<PAGE>

     2.6  LIBOR OPTION.  

          2.6.1 OPTION.  Subject to the provisions of Sections 2.7 and 2.8,
     Borrower shall have the option (i) to request that a Revolver Advance be
     made at the Fixed Rate rather than the Floating Rate, (ii) to convert at
     any time the interest rate charged on all or any part of the Principal
     Balance of the Loan from the Floating Rate to a Fixed Rate; or (iii) upon
     the expiration of any Interest Period applicable to a LIBOR Loan, to
     continue all or any portion of the same as a LIBOR Loan, and the succeeding
     Interest Period of such continued LIBOR Loan shall commence on the
     expiration date of the Interest Period applicable thereto; PROVIDED, that
     no portion of the outstanding Loan may be continued as, or be converted
     into, a LIBOR Loan when any Event of Default or Default has occurred and is
     continuing.  Any Revolver Advance to be made at a Fixed Rate and any
     partial conversion of the Loan to a Fixed Rate or continuation of the Loan
     at a Fixed Rate under this Section shall be in a minimum amount of
     $100,000, and in integral multiples of $100,000 in excess of that amount.

          2.6.2 NOTICE PROCEDURE.  If Borrower requests that a Revolver Advance
     bear interest at the Fixed Rate or if Borrower desires to convert all or a
     portion of the Loan to a LIBOR Loan or to continue all or any portion of a
     LIBOR Loan as a LIBOR Loan, Borrower shall notify Lender no later than
     12:00 p.m. (Chicago time) on the third Business Day prior to the
     aforementioned request or the proposed conversion or continuation date. 
     Each notice shall specify (i) the proposed Revolver Advance disbursement
     date or the conversion or continuation date (which shall be a Business
     Day), as applicable, (ii) the principal amount of the applicable Revolver
     Advance or the principal amount of the Loan to be converted to or continued
     as a LIBOR Loan, as applicable, and (iii) the requested Interest Period. 
     In lieu of delivering the above-described notice, Borrower may give Lender
     telephonic notice of any proposed LIBOR Loan or the conversion or
     continuation of a LIBOR Loan by the time required under this Section;
     PROVIDED, that such notice is confirmed in writing by delivery or fax to
     Lender of such notice in no event later than 4:00 p.m. (Chicago time) on
     the date of such telephonic notice.

          2.6.3 NOTICE IRREVOCABLE.  Notice of any proposed LIBOR Loan or of
     conversion to a LIBOR Loan or continuation of a LIBOR Loan (or telephonic
     notice in lieu thereof) shall be irrevocable and Borrower shall be bound in
     accordance with the terms of such notice.

          2.6.4 FAILURE TO PROVIDE NOTICE OF CONTINUATION.  If notice of the
     continuation of a LIBOR Loan is not delivered by Borrower in a timely
     manner, the amount of such LIBOR Loan shall bear interest at the Floating
     Rate as of the termination date of the applicable Interest Period and shall
     no longer bear interest at the Fixed Rate unless it is thereafter converted
     to a new LIBOR Loan in the manner described above.

     2.7  INTEREST PERIODS.  By giving notice as required hereunder, Borrower
shall have the option, subject to the other provisions of this Section, to
specify a one-, two-, three-, four-, 

                                       10

<PAGE>

five- or six-month interest period (each an "Interest Period") during which 
all or a portion of the Loan shall bear (or, if already a LIBOR Loan, 
continue to bear) interest at the LIBOR Rate.  The determination of Interest 
Periods shall be subject to the following provisions:

          (a)  In the case of immediately successive Interest Periods, each
     successive Interest Period shall commence on the day on which the
     immediately preceding Interest Period expires;

          (b)  If any Interest Period would otherwise expire on a day which is
     not a Business Day, the Interest Period shall be extended to expire on the
     next succeeding Business Day (unless the next succeeding Business Day is in
     the next calendar month, in which event the Interest Period shall expire on
     the immediately preceding Business Day);

          (c)  Borrower may not select an Interest Period which terminates later
     than the Maturity Date;

          (d)  There shall be no more than four (4) Interest Periods with
     respect to the Loan in effect at any one time.

     2.8  SPECIAL PROVISIONS GOVERNING LIBOR LOANS.

          2.8.1 DETERMINATION OF INTEREST RATE.  On the Interest Rate
     Determination Date, Lender shall determine (which determination shall,
     absent manifest error, be presumptively correct) the Fixed Rate that shall
     apply to the subject LIBOR Loan and shall promptly give notice thereof to
     Borrower.  If on any Interest Rate Determination Date Lender is unable to
     obtain the applicable LIBOR Rate quotations, Lender shall give Borrower
     prompt notice thereof and such requested LIBOR Loan shall automatically
     become a Prime Loan and shall bear interest at the Floating Rate.

          2.8.2 INTEREST RATE UNASCERTAINABLE, INADEQUATE OR UNFAIR.  If, with
     respect to any Interest Period, (i) any change occurs in any applicable law
     or governmental rule, regulation or order (or any interpretation thereof
     and including the introduction of any new law or governmental rule,
     legislation or order) affecting the interbank Eurodollar market for such
     Interest Period, or (ii) other circumstances affecting the interbank
     Eurodollar market for such Interest Period results in the then applicable
     Fixed Rates not adequately reflecting the cost to Lender of making or
     funding the LIBOR Loans, Lender shall give notice thereof to Borrower,
     whereupon until Lender has determined that the circumstances giving rise to
     such inadequacy no longer exist, (A) the right of Borrower to elect to have
     any portion of the Loan bear interest based upon the Fixed Rate shall be
     suspended for such Interest Period, and (B) each outstanding LIBOR Loan
     shall bear interest at the Floating Rate commencing on the last day of the
     then current Interest Period therefor, notwithstanding any prior election
     by Borrower to the contrary.

     2.9  ILLEGALITY.  In the event that on any date Lender shall have
reasonably determined that the making or continuation of any LIBOR Loan has
become unlawful by compliance by 

                                       11

<PAGE>

Lender in good faith with any law, governmental rule, regulation or order of 
any Governmental Body, then Lender shall promptly give notice to Borrower of 
that determination.  Upon the giving of such notice, Borrower's right to 
request of Lender and Lender's obligation to make LIBOR Loans shall be 
immediately suspended to the extent specified in such notice, and if any 
LIBOR Loans are then outstanding, each such LIBOR Loan shall immediately 
become a Prime Loan and shall commence bearing interest at the Floating Rate. 
If Lender determines at any time following its giving of the aforementioned 
notice that Lender may lawfully make LIBOR Loans of the type(s) referred to 
in such notice, Lender shall promptly give notice to Borrower of such 
determination, whereupon Borrower's right to request of Lender and Lender's 
obligation to make LIBOR Loans of such type shall be restored.

     2.10 COMPENSATION.  Borrower shall indemnify Lender, within five (5)
Business Days following Borrower's receipt of the written statement described
below, for all losses, expenses and liabilities (including, without limitation,
any loss or expense incurred by reason of liquidation or reemployment of
deposits or other funds acquired by Lender to fund or maintain Lender's LIBOR
Loans to Borrower) which Lender may sustain (i) if such LIBOR Loans are not made
when requested due to Borrower's actions or inactions, (ii) if any prepayment of
any LIBOR Loan occurs for any reason on a date which is not the last day of the
applicable Interest Period, or (iii) as a consequence of any required conversion
of the interest rate applicable to a LIBOR Loan to a Floating Rate, (such
losses, expenses and liabilities being collectively referred to as "Break
Costs").  Lender shall promptly deliver to Borrower a written statement as to
such Break Costs, which statement shall be rebuttably presumed correct.  The
maximum amount of any indemnification under this Section 2.10 shall not exceed
the interest which would have been payable for the balance of the applicable
Interest Period for the aforesaid LIBOR Loans.

     2.11 LIBOR RATE TAXES.  Borrower agrees that:

          2.11.1 ADDITIONAL PAYMENTS.  Borrower shall pay, prior to the date on
     which penalties attach thereto, all present and future stamp and other
     taxes, levies, or costs and charges whatsoever imposed, assessed, levied or
     collected on or in respect of the Loan solely as a result of the interest
     rate being determined by reference to the LIBOR Rate or any payments of
     principal, interest or other amounts made on or in respect of a Loan made
     to Borrower when the interest rate is determined by reference to the LIBOR
     Rate (all such taxes, levies, costs and charges being herein collectively
     called "LIBOR Rate Taxes"); PROVIDED HOWEVER, that LIBOR Rate Taxes shall
     not include income or franchise taxes imposed by any jurisdiction (except
     that Borrower shall be liable for the payment of the amount of any
     additional net income or franchise taxes attributable to payments made by
     Borrower pursuant to this Section).

          2.11.2 INDEMNITY.  Borrower shall indemnify Lender against, and
     reimburse Lender within five (5) days after Lender's written demand for,
     any LIBOR Rate Taxes paid by Lender.  Lender shall provide Borrower with
     appropriate receipts for any payments or reimbursements made by Borrower
     pursuant to this Section as a result of the Loan.

                                       12

<PAGE>

     2.12 DEFAULT RATE.  During a Default Period, the Principal Balance shall
bear interest at the Default Rate.

     2.13 METHOD OF PAYMENT; GOOD FUNDS.  All payments to be made by Borrower
pursuant to the Loan Documents shall be delivered to Lender at 135 South LaSalle
Street, Chicago, Illinois 60603, or to such other address as Lender shall notify
Borrower.  Payment shall not be deemed to have been received by Lender until
Lender is in receipt of Good Funds.

     2.14 DEPOSIT TO BORROWER'S ACCOUNT.  Lender may, at its option, deposit the
proceeds of the Loan into a working capital account maintained by Borrower with
Lender and shall have the right to debit such account (or any other account or
deposit maintained or made by Borrower with Lender) from time to time for any of
Borrower's Obligations that are due and payable.


                                      ARTICLE 3
                                           
                                  NOTE AND SECURITY

     3.1  NOTE.  The Loan shall be evidenced by the Note.

     3.2  SECURITY.  All Borrower's Obligations shall be secured by the Pledge
Agreement.


                                      ARTICLE 4
                                           
                                CONDITIONS OF FUNDING

     Lender's obligation to make any Revolver Advance shall be subject to the
satisfaction of all of the following conditions in a manner, form and substance
reasonably satisfactory to Lender:

     4.1 INITIAL ADVANCE.  The obligation of the Lender to make the initial
Revolver Advance is, in addition to the conditions precedent specified in
Section 4.2, subject to the following being delivered to Lender, each duly
authorized and executed:

          (a)  the Loan Documents;

          (b)  a certificate of the general partner of Borrower, certifying on
     the Closing Date:

               (i) the certificate of limited partnership of Borrower, certified
          by the Secretary of State of the state of organization of Borrower, as
          of a date within the month in which the Closing Date occurs; and

               (ii) the agreement of limited partnership of Borrower;

                                       13

<PAGE>

          (c)  a certificate of the general partner of each of Prime Group
     Operating Partnership and Prime Group Realty Operating Partnership,
     certifying on the Closing Date:

               (i) the certificate of limited partnership of such partnership,
          certified by the Secretary of State of the state of organization of
          such partnership, as of a date within the month in which the Closing
          Date occurs; and

               (ii) the agreement of limited partnership of such partnership;

          (d)  a certificate of the Secretary or Assistant Secretary of PGLP,
     Inc. and The Prime Group, certifying on the Closing Date:

               (i) the certificate or articles of incorporation, and all
          amendments thereto, of such Person, certified by the Secretary of
          State of the state of organization of such Person, as of a date within
          the month in which the Closing Date occurs;

               (ii) the by-laws, and all amendments thereto, of such Person;

               (iii) Copies of the resolutions of such Person approving and
          authorizing the execution, delivery and performance by such Person (as
          to PGLP, Inc., in its own capacity or in its capacity as managing
          general partner of Borrower) of the Loan Documents to be executed or
          delivered by it (or, as to PGLP, Inc., by Borrower) hereunder; and

               (iv) the names and true signatures of the officers of  such
          Person authorized to execute, deliver and perform, as applicable, the
          Loan Documents to be executed or delivered by it hereunder; 

          (e)  a certificate of existence, as of a date within the month in
     which the Closing Date occurs, from the Secretary of State of the state of
     organization for each of (i) Borrower, (ii) Prime Retail Operating
     Partnership, and (iii) Prime Group Realty Operating Partnership;

          (f)  a good standing certificate, as of a date within the month in
     which the Closing Date occurs, from the Secretary of State of the state of
     incorporation for each of (i) PGLP, Inc. and (ii) The Prime Group;

          (g)  opinions of counsel for Borrower and Guarantor, in form and
     substance satisfactory to Lender;

          (h)  a borrowing base certificate (as described in Section 6.3.4);

                                       14

<PAGE>

          (i)  all filings of Uniform Commercial Code Financing Statements and
     all other recordings and actions necessary to perfect and maintain the
     Security Interests as first, valid and perfected liens and security
     interests in the Collateral shall have been filed or taken and confirmation
     thereof received;

          (j)  all necessary consents under each of (i) the agreement of limited
     partnership for the Prime Retail Operating Partnership and the Prime Group
     Realty Operating Partnership (the "Partnership Agreements"),  and (ii) the
     Prime Group Realty Registration Rights Agreement and the Prime Retail
     Registration Rights Agreement approving (1) the transactions contemplated
     by the Loan Documents, including, but not limited to, the pledge of the
     Partnership Units under the Pledge Agreement; (2) the exercise of Lender's
     rights hereunder and under the Pledge Agreement upon the occurrence of any
     Event of Default; (3) the admission of Lender as a limited partner of the
     Prime Retail Operating Partnership and the Prime Group Realty Operating
     Partnership upon foreclosure of the Collateral; (4) the exchange of the
     Prime Retail Partnership Units for Prime Retail, Inc. Shares, (5) the
     exchange of the Prime Group Realty Partnership Units for PGRT Shares,
     (6) the registration of such PGRT Shares with the SEC as provided under the
     Prime Group Realty Registration Rights Agreement, (7) the registration of
     the Prime Retail, Inc. Shares with the SEC as provided under the Prime
     Retail Registration Rights Agreement, and (8) the ability of Lender to
     become a party to the Prime Retail, Inc. Registration Rights Agreement;

          (k)  payment of all amounts for fees and expenses owning to Lender
     under this Loan Agreement; and

          (l)  such other instruments, documents, certificates, consents,
     waivers and opinions necessary to consummate the transactions contemplated
     in this Loan Agreement and in the other Loan Documents, or as Lender may
     reasonably request.

     4.2  ALL REVOLVER ADVANCES.  The obligation of Lender to make any Revolver
Advance is subject to the following further conditions precedent that:

          4.2.1     REPRESENTATIONS AND WARRANTIES.  The representations and
     warranties of Borrower and Guarantor, as the case may be, set forth in this
     Loan Agreement and the other Loan Documents shall be true and correct in
     all material respects as of the date such Revolver Advance is made, except
     for any representation or warranty limited by its terms to a specific date
     and taking into account any disclosures made in writing pursuant to the
     terms of this Loan Agreement.

          4.2.2     PERFORMANCE; NO DEFAULT.  Borrower shall have performed and
     complied with all agreements and conditions contained in the Loan Documents
     to be performed by or complied with prior to such Revolver Advance and no
     Event of Default of Default then exists.

                                       15

<PAGE>

                                      ARTICLE 5

                            REPRESENTATIONS AND WARRANTIES

     Borrower represents and warrants to Lender as follows:

     5.1 BORROWER.  Borrower is a limited partnership duly formed and validly 
existing under the laws of the State of Illinois.  The Borrower is duly 
qualified in each jurisdiction in which the failure to so qualify could have 
a Material Adverse Effect on Borrower.  The Borrower has full power and 
authority to execute and deliver the Loan Documents and to perform its 
obligations hereunder and thereunder.  The agreement of limited partnership 
of Borrower, as amended, a copy of which has been furnished to Lender, is 
true, correct and complete.

     5.2 PARTNERS OF BORROWER.  The managing general partner of Borrower is 
PGLP, Inc. and the limited partners of Borrower are Prime Group II, L.P., an 
Illinois limited partnership, Prime Group Limited Partnership, an Illinois 
limited partnership, The Prime Group, and Prime International, Inc., an 
Illinois corporation. PGLP, Inc. is a duly formed corporation, validly 
existing and in good standing in the State of Illinois and qualified to do 
business in each jurisdiction in which failure to do so would have a Material 
Adverse Effect on PGLP, Inc.

     5.3 AUTHORITY.  No consent or approval of, or other action by, any 
partner, Governmental Body or any other Person, which has not already been 
obtained, is required to be obtained by Borrower to authorize, or is required 
to be obtained by Borrower in connection with the execution, delivery and 
performance of, the Loan Documents, or is required as a condition to the 
validity or, subject to the terms of the Partnership Agreements, 
enforceability of the Security Interests or any of the Loan Documents.

     5.4 NECESSARY ASSETS.  Borrower owns all of the assets necessary to 
operate and maintain the operations of the Business.

     5.5 BINDING AGREEMENTS.  This Loan Agreement and the other Loan 
Documents, when executed and delivered, will constitute the valid and legally 
binding obligations of Borrower, and will be enforceable against Borrower in 
accordance with their respective terms, except as such  enforceability may be 
limited by applicable bankruptcy, insolvency, reorganization, moratorium or 
similar laws affecting the enforcement of creditors' rights generally and by 
equitable principles.

     5.6 BORROWER'S SECURITIES.  As of the Closing Date, Borrower owns 
3,576,933 Brookdale Shares, 104,632 Prime Retail Partnership Units, 115,000 
AIMCO Shares, and 47,525 Prime Group Realty Partnership Units (collectively, 
the "Borrower's Securities").

     5.7 TITLE TO PROPERTY; LIENS.  Borrower shall have good and marketable 
title to all of the Collateral free and clear of all Liens.  The applicable 
Loan Documents create a valid and perfected Lien in the Collateral described 
therein.

                                       16

<PAGE>

     5.8 FINANCIAL STATEMENTS.  The financial statements previously delivered to
Lender present fairly the financial condition and the results of  the operations
of Borrower and Guarantor as of the dates and for the periods indicated therein.

     5.9 LITIGATION. To the knowledge of Borrower, there are no actions, suits,
arbitration proceedings or claims pending or threatened at law or in equity or
before any Governmental Body which, if adversely determined, could have a
Material Adverse Effect on Borrower or Guarantor.  As of the Closing Date, to
the knowledge of Borrower, there are no proceedings pending or threatened which
call into question the validity or enforceability of any of this Loan Agreement
or the other Loan Documents or any of the transactions contemplated hereby or
thereby.

     5.10 CONFLICTING AGREEMENTS.  Borrower is not in default under any
agreement to which it is a party or by which Borrower or any of its Property is
bound, the effect of which default has resulted in the termination of such
agreement and such termination will have a Material Adverse Effect on Borrower. 
No authorization or approval or other action by, and no notice to or filing
with, any Governmental Body which has not been obtained, given or made by
Borrower is required for the due execution, delivery and performance by Borrower
of any of the Loan Documents.  No provision of any mortgage, indenture, contract
or agreement to which Borrower is a party conflicts with, or requires any
consent which has not already been obtained or is anticipated to be obtained as
described above, or in any way would prevent the execution, delivery or
performance of the terms of, any of the Loan Documents.  Neither the execution,
delivery, or carrying out of the terms of the Loan Documents will constitute a
default under, or result in the creation or imposition of, or obligation to
create, any Lien upon the Property of Borrower pursuant to the terms of any such
mortgage, indenture, contract or agreement.  Neither the execution and deliver
by Borrower of the Loan Documents, nor the consummation of the transactions
therein contemplated, nor compliance with the provisions thereof will violate
any law, rule, regulation, order, writ, judgment, injunction, decree or award
binding on Borrower, except where such violation could not reasonably be
expected to have a Material Adverse Effect.

     5.11 COMPLIANCE WITH APPLICABLE LAWS.  Borrower is not in default in
respect of any judgment, order, writ, injunction, decree or decision of any
Governmental Body, which default would have a Material Adverse Effect on
Borrower.  Borrower is in compliance in all material respects with all
applicable statutes and regulations of all Governmental Bodies, a violation of
which would have a Material Adverse Effect on Borrower.

     5.12 APPLICATION OF CERTAIN LAWS AND REGULATIONS.

          5.12.1 INVESTMENT COMPANY ACT.  Borrower is not an "investment
     company," or a company "controlled" by an "investment company," within the
     meaning of the Investment Company Act of 1940, as amended.

          5.12.2 HOLDING COMPANY ACT.  Borrower is not a "holding company," or a
     "subsidiary company" of a "holding company," or an "affiliate" of a
     "holding company" 

                                       17

<PAGE>

     or of a "subsidiary company" of a "holding company," as such terms 
     are defined in the Public Utility Holding Company Act of 1935, as amended.

     5.13 MARGIN REGULATIONS.  None of the transactions contemplated by this
Loan Agreement or any of the other Loan Documents, including the use of proceeds
of the Loan, will violate or result in a violation of Section 7 of the Exchange
Act, or any regulations issued pursuant thereto, including, without limitation,
Regulations T, U and X.

     5.14 NO MISREPRESENTATION.  To Borrower's knowledge, no representation or
warranty contained herein and no certificate, information or report furnished or
to be furnished by Borrower in connection with any of the Loan Documents or any
of the transactions contemplated hereby or thereby contains or will contain a
misstatement of material fact, or omits or will omit to state a material fact
required to be stated in order to make the statements contained herein or
therein not misleading in the light of the circumstances under which such
statements were made.  To Borrower's knowledge, there is no fact which has not
expressly been disclosed to Lender in writing, or so far as Borrower reasonably
can foresee, that will have a Material Adverse Effect on Borrower or Guarantor.

     5.15 NO AFFILIATION.  Borrower and AIMCO are not "affiliates" as that term
is defined in the Securities Act of 1933, as amended.

     5.16 REGISTRATION EFFECTIVE.  The Prime Retail, Inc. Registration 
Statement, with respect to the Prime Retail, Inc. Shares issuable upon 
conversion of the Prime Retail Partnership Units, has been declared effective 
under the Securities Act of 1933, as amended, and to Borrower's knowledge, no 
"stop order" suspending the effectiveness of the Prime Retail, Inc. 
Registration Statement has been issued, nor has any proceeding for the 
issuance of such an order been initiated or threatened.

                                      ARTICLE 6
                                           
                                AFFIRMATIVE COVENANTS

     Until all of Borrower's Obligations are paid and performed in full,
Borrower agrees:

     6.1 LEGAL EXISTENCE; GOOD STANDING.  Borrower shall maintain its existence
in its jurisdiction of organization and maintain its qualification in any
jurisdiction in which failure to be so qualified would have a Material Adverse
Effect.  The Guarantor shall maintain its existence and remain in good standing
in its jurisdiction of incorporation and in any jurisdiction in which failure to
be so qualified would have a Material Adverse Effect.

     6.2 INSPECTION.  Borrower will permit representatives of Lender to visit
its offices to examine its books and records and Accountants' reports relating
thereto, and to make copies or extracts therefrom, and to discuss its business
and affairs with its employees, all at reasonable times, upon reasonable prior
notice, and, at all reasonable times and upon reasonable prior notice, 

                                       18

<PAGE>

to examine and inspect its Property and to meet and discuss the business and 
its affairs with the Accountants.

     6.3 FINANCIAL STATEMENTS AND OTHER INFORMATION OF BORROWER.  Borrower will
maintain a system of accounting in accordance with GAAP and furnish to Lender:

          6.3.1 ANNUAL STATEMENTS.  As soon as available and in any event within
     120 days after the close of each fiscal year, a copy of (a) the balance
     sheet of Borrower as of the end of such year, and (b) the statements of
     income and cash flow of Borrower for such year, setting forth in each case
     (beginning with the 1998 financial statements) in comparative form the
     corresponding figures for the preceding year, all in reasonable detail, and
     in each case audited by the Accountants.  Such annual statements shall be
     accompanied by a report of the Accountants which states that in making the
     audit of the financial statements of Borrower, nothing of a financial or
     accounting nature came to the attention of the Accountants that caused them
     to believe that Borrower was not in compliance with the terms, covenants,
     provisions, or conditions of any of the Loan Documents or that there shall
     have occurred a condition or event that constitutes an Event of Default
     (or, if applicable, specifying in such certificate the nature and status of
     any instances of non-compliance or Events of Default), and which is
     otherwise in a form reasonably satisfactory to Lender.

          6.3.2 NOTICE OF DEFAULTS; LOSS.  Immediate written notice if:  (i) any
     Indebtedness aggregating in excess of $3,000,000 of Borrower or Guarantor
     is declared or shall become due and payable prior to its declared or stated
     maturity (other than regularly scheduled payments), or called and not paid
     when due, (ii) the holder of any note, or other evidence of Indebtedness,
     certificate or security evidencing any such Indebtedness aggregating in
     excess of $3,000,000 of Borrower or Guarantor has the right to declare such
     Indebtedness due and payable prior to its stated maturity, (iii) there
     shall occur and be continuing a Default or Event of Default, accompanied by
     a certified statement of an authorized officer of PGLP, Inc., as managing
     general partner of Borrower, or an authorized officer of Guarantor setting
     forth what action Borrower or Guarantor, as the case may be, proposes to
     take in respect thereof, or (iv) any event shall occur causing loss or
     depreciation in the value of assets having a Material Adverse Effect upon
     the business or operations of Borrower or Guarantor, including the amount
     or the estimated amount of any such loss or depreciation or adverse effect.

          6.3.3 NOTICE OF SUITS, ADVERSE EVENTS.  Prompt written notice of:  (i)
     any citation, summons, subpoena,  order to show cause or other order naming
     Borrower or Guarantor a party to any proceeding involving in excess of
     $3,000,000 and include with such notice a copy of such citation, summons,
     subpoena, order to show cause or other order, (ii) any lapse or other
     termination of any material license, permit, franchise, agreement or other
     authorization issued to Borrower or Guarantor by any Governmental Body or
     any other Person, (iii) any refusal by any Governmental Body or any other
     Person to renew or extend any such material license, permit, franchise,
     agreement or other authorization and (iv) any dispute between Borrower or
     Guarantor and any 

                                       19

<PAGE>

     Governmental Body or any other Person, which lapse, termination, refusal
     or dispute referred to in clauses (ii) or (iii) above or in this
     clause (iv) may have a material adverse effect on the financial
     condition, operations, business, prospects or Property of Borrower or
     Guarantor.

          6.3.4 COVENANT COMPLIANCE CERTIFICATE; BORROWING BASE CERTIFICATE.  On
     or before the 20th day after the end of each calendar quarter, a compliance
     certificate in a form reasonably satisfactory to Lender stating whether
     Borrower is in compliance with the terms, covenants, provisions and
     conditions of the Loan Documents and specifying any condition or event that
     constitutes an Event of Default set forth in Article 8 hereof, together
     with any supporting documentation reasonably requested by Lender.  On the
     date of each requested Revolver Advance, and on or before the 5th day after
     the end of each month, a borrowing base certificate in a form reasonably
     satisfactory to Lender setting forth the calculation of the Available
     Borrowing Base as of the close of business of the business day immediately
     preceding the date of such Revolver Advance or as of the end of the
     preceding month, as applicable.

          6.3.5 OTHER INFORMATION.  Such other information and reports relating
     to the past, present or future financial condition, operations, plans and
     projections of Borrower as Lender reasonably may request from time to time.

     6.4  FINANCIAL INFORMATION OF PRIME RETAIL, INC. AND PGRT.  Borrower shall
furnish to the Bank:

          6.4.1  as soon as available, but in no event more than five (5)
     Business Days after request by Lender, a copy of each quarterly report on
     Form 10-Q filed by Prime Retail, Inc., PGRT, Brookdale and AIMCO with the
     SEC;

          6.4.2  as soon as available, but in no event more than five (5)
     Business Days after request by Lender, a copy of any annual report on
     Form 10-K filed by Prime Retail, Inc., PGRT, Brookdale or AIMCO with the
     SEC.

          6.4.3  as soon as available, but in any event no more than five (5)
     Business Days after request by Lender, any other report filed by Prime
     Retail, Inc., PGRT, Brookdale or AIMCO with the SEC under Section 13 of the
     Exchange Act, and any definitive proxy material filed by such Person with
     the SEC under Section 14 of the Exchange Act.

     6.5 REPORTS TO GOVERNMENTAL BODIES AND OTHER PERSONS.  Borrower will file,
all on a timely basis, all reports, applications, documents, instruments and
information required to be filed pursuant to all rules, regulations or requests
of any Governmental Body or other Person having jurisdiction over the operation
of Borrower, including, but not limited to, such of the Loan Documents as may be
required to be filed with any such Governmental Body or other Person pursuant to
applicable rules and regulations promulgated by such Governmental Body or other
Person, unless the failure to file would not reasonably be expected to have a
Material Adverse Effect.

                                       20

<PAGE>

     6.6 GENERAL PARTNER. PGLP, Inc. or a "Prime Group Entity" at all times
shall remain the general partner of Borrower.  As used herein, a "Prime Group
Entity" shall mean (i) PGLP, Inc., (ii) The Prime Group, (iii) any person in
which The Prime Group or PGLP, Inc. has a beneficial ownership of 51% or more of
the voting interests in such person, (iv) any entity controlling, controlled by
or under common control with, The Prime Group or PGLP, Inc., or (v) any entity
in which The Prime Group or PGLP, Inc., or officers, directors and employees of
The Prime Group or PGLP, Inc. own, directly or indirectly, a controlling
interest.

     6.7 FINANCIAL STATEMENTS OF GUARANTOR.  Borrower will cause Guarantor to
furnish to Lender as soon as available and in any event within 180 days after
the close of each fiscal year, a copy of Guarantor's (a) balance sheet as of the
end of such year, and (b) statements of income and cash flow for such year,
setting forth in each case (beginning with the 1998 financial statements) in
comparative form the corresponding figures for the preceding year, all in
reasonable detail, and in each case audited by the Accountants.


                                      ARTICLE 7
                                           
                                  NEGATIVE COVENANTS

     Borrower shall not:

     7.1  Engage in any business other than the Business or otherwise materially
change the nature of the Business of Borrower as it exists on the Closing Date.

     7.2  Amend, modify or waive any term or provision of Borrower's certificate
of limited partnership or agreement of limited partnership in a manner that
would have a Material Adverse Effect.

     7.3  Sell, lease, assign, transfer, pledge, hypothecate or otherwise
dispose of or grant any security interest in any of Borrower's Securities
pledged as Collateral, except as permitted by Section 5.7.

     7.4  Consent to any alteration or modification of any provision affecting
the Partnership Units, which alteration or modification would have a Material
Adverse Effect.


                                    ARTICLE 8
                                         
                               DEFAULT AND REMEDIES

     8.1 EVENTS OF DEFAULT.  The occurrence of any of the following shall
constitute an Event of Default under the Loan Documents:

                                       21

<PAGE>

          8.1.1 DEFAULT IN PAYMENT.  If Borrower shall fail to pay all or any
     portion of Borrower's Obligations on or before the fifth Business Day
     following the date on which the same become due and payable.

          8.1.2 BREACH OF COVENANTS AND CERTAIN OTHER PROVISIONS.

          (a)  If Borrower shall fail to observe or perform any covenant or
     agreement made by Borrower contained in Article VI (except for Sections 6.1
     and 6.5) or in Article VII.

          (b)  If Borrower shall fail to observe or perform any covenant or
     agreement (other than those referred to in subparagraph (a) above) made by
     Borrower in any of the Loan Documents, and such failure shall continue for
     a period of 30 days after the earlier of (i) the written notice of such
     failure is given to Borrower by Lender or (ii) the date Borrower shall have
     actual knowledge of such failure; PROVIDED, HOWEVER, that if such default
     is of a nature that it cannot be cured within thirty (30) days and Borrower
     commences and diligently proceeds to cure such default, such cure period
     shall be extended for such period of time as required to cure such default
     but in no event more than thirty (30) additional days.

          (c)  Any alterations, modifications or amendments are made to the
     certificate or articles of incorporation of either Prime Retail, Inc. or
     PGRT or to any other agreement that would adversely alter in any material
     manner the rights afforded to holders of Collateral consisting of (i) Prime
     Retail Partnership Units in the Second Amended and Restated Agreement of
     Limited Partnership of Prime Retail, L.P., as further amended, or (ii)
     Prime Group Realty Partnership Units in the Amended and Restated Agreement
     of Limited Partnership of Prime Group Realty, L.P., as further amended, to
     convert such Partnership Units into Prime Shares.

          8.1.3 BREACH OF WARRANTY.  Any representation or warranty made by
     Borrower or Guarantor in or pursuant to any of the Loan Documents to which
     Borrower or  Guarantor is a party or in any instrument or document
     furnished in compliance with the Loan Documents shall prove to be false or
     misleading in any material respect as of the date on which made.

          8.1.4 ACCELERATION OF ANY INDEBTEDNESS.  If Borrower or Guarantor at
     any time shall be in default (as principal or guarantor or other surety) in
     the payment of any principal of or premium or interest on any Indebtedness
     for Borrowed Money in excess of $3,000,000 (other than Borrower's
     Obligations) and in each case such default has resulted in an acceleration
     of the maturity of such Indebtedness for Borrowed Money which is not paid
     promptly upon acceleration.

                                       22

<PAGE>

          8.1.5 BANKRUPTCY.

          (a)  If Borrower or Guarantor or, to the extent, and for so long as,
     the shares or limited partnership units of such Person (or, in the case of
     Prime Retail, Inc. and PGRT, shares of limited partnership units that are
     exchangeable into shares of such Person) have been pledged to Lender as
     security for the Loan, the Prime Retail Operating Partnership, the Prime
     Group Realty Operating Partnership, Prime Retail, Inc., PGRT, Brookdale or
     AIMCO shall (i) generally not be paying, or admit in writing its inability
     to pay, its debts as they become due, (ii) file, or consent, by answer or
     otherwise, to the filing against any of such entities, of a petition for
     relief or reorganization or arrangement or any other petition in bankruptcy
     or insolvency under the laws of any jurisdiction, (iii) make an assignment
     for the benefit of creditors, (iv) consent to the appointment of a
     custodian, receiver, trustee or other officer with similar powers for, or
     for any substantial part of the Property owned by any of such entities, (v)
     be adjudicated insolvent, or (vi) take a corporate action to authorize any
     of the foregoing.

          (b)  If any Governmental Body of competent jurisdiction shall enter an
     order appointing, without consent of Borrower or Guarantor  or, to the
     extent, and for so long as, the shares or limited partnership units of such
     Person (or, in the case of Prime Retail, Inc. and PGRT, shares of limited
     partnership units that are exchangeable into shares of such Person) have
     been pledged to Lender as security for the Loan, the Prime Retail Operating
     Partnership, the Prime Group Realty Operating Partnership, Prime Retail,
     Inc., PGRT, Brookdale or AIMCO, a custodian, receiver, trustee or other
     officer with similar powers with respect to any of such Persons, or with
     respect to any substantial part of the Property belonging to Borrower or
     such Person, or if an order for relief shall be entered in any case or
     proceeding for liquidation or reorganization or otherwise to take advantage
     of any bankruptcy or insolvency law of any jurisdiction, or ordering the
     dissolution, winding-up or liquidation of any of such entities, or if any
     petition for any such relief shall be filed against any of such entities
     and such order or petition shall not be dismissed within 90 days.

          8.1.6 JUDGMENTS.  If there shall exist final judgments against
     Borrower or  Guarantor which shall have been outstanding for any period of
     30 days or more from the date of the entry thereof and shall not have been
     discharged in full or stayed pending appeal and if the aggregate amount
     thereof exceeds $3,000,000.

          8.1.7 NON-PERFORMANCE OF GUARANTY, ETC.  Guarantor shall fail (subject
     to any applicable notice, cure or grace period) to comply with or to
     perform in any material respect any covenant set forth in the Guaranty,
     Guarantor (or any Person by, through or on behalf of Guarantor) shall
     contest in any manner the validity, binding nature or enforceability of the
     Guaranty, or the Guaranty shall cease to be in full force and effect.

          8.1.8 INVALIDITY OF PLEDGE AGREEMENT, ETC.  The Pledge Agreement shall
     cease to be in full force and effect, any party thereto (other than Lender)
     shall fail (subject to any applicable notice, cure or grace period) to
     comply with or to perform in any material 

                                       23

<PAGE>

     respect any applicable provision of the Pledge Agreement promptly 
     upon request of the Lender (or, if such noncompliance or nonperformance
     would result in the non-perfection of a material portion of the 
     Collateral granted to the Lender under the Pledge Agreement, at any
     time regardless of whether the Lender has made any such request), or
     any Person (other than the Lender) party to the Pledge Agreement (or
     any Person by, through or on behalf of such Person party thereto)
     shall contest in any manner the validity, binding nature of
     enforceability of the Pledge Agreement, as applicable.

     8.2 ACCELERATION OF BORROWER'S OBLIGATIONS.  Upon the occurrence of:

          (a)  any Event of Default described in clauses (ii), (iii), (iv) and
     (v) of subsection 8.1.5(a) or described in Section 8.1.5(b), all of
     Borrower's Obligations at that time outstanding automatically shall mature
     and become due and payable and Borrower's right to request additional
     Revolver Advances shall immediately terminate, or

          (b)  any other Event of Default, Lender, at any time, (unless such
     Event of Default shall have been cured by Borrower or waived by Lender) at
     its option, may declare all of Borrower's Obligations due and payable,
     whereupon Borrower's Obligations immediately shall mature and become due
     and payable and Borrower's right to request additional Revolver Advances
     shall immediately terminate,

all without presentment, demand, protest, or notice, all of which hereby are
waived.

     8.3 REMEDIES ON DEFAULT.  If any of Borrower's Obligations have been
accelerated pursuant to Section 8.2, Lender, at its option, may:

          8.3.1 ENFORCEMENT OF SECURITY INTERESTS.  Enforce its rights and
     remedies under the Loan Documents in accordance with their respective
     terms.

          8.3.2 OTHER REMEDIES.  Enforce any of the rights or remedies granted
     to Lender under any other Loan Document and any other rights or remedies
     accorded to Lender at equity or law, by virtue of statute or otherwise.

     8.4 APPLICATION OF FUNDS.  Any funds received by Lender pursuant to the
exercise of any rights accorded to Lender pursuant to, or by the operation of
any of the terms of, any of the Loan Documents, including, without limitation,
insurance proceeds, condemnation proceeds or proceeds from the sale of
Collateral, shall be applied by Lender in the following order of priority:

          8.4.1 EXPENSES.  First, to the payment of (i) all fees and expenses,
     including, without limitation, reasonable attorney's fees, court costs,
     fees of appraisers, title charges, costs of maintaining and preserving the
     Collateral, costs of sale, and all other costs incurred by the Lender in
     exercising any rights accorded to the Lender pursuant to the Loan Documents
     or by applicable law and (ii) all Liens superior to the Liens of Lender,
     except such superior Liens subject to which any sale of the Collateral may
     have been made;

                                       24

<PAGE>

          8.4.2 BORROWER'S OBLIGATIONS.  Next to the payment of Borrower's
     Obligations in such order as Lender may determine; and

          8.4.3 SURPLUS.  Any surplus, to the Person or Persons entitled
     thereto.

                                      ARTICLE 9
                                           
                                       CLOSING

     The closing of the Loan (the "Closing") shall be on the date hereof (the
"Closing Date"), and the Closing shall take place on such date provided all
conditions for the Closing as set forth in this Loan Agreement have been
satisfied.  The Closing shall occur at such place as the parties hereto shall
agree.  


                                      ARTICLE 10
                                           
                                EXPENSES AND INDEMNITY

     10.1 CLOSING FEE.  The Borrower shall pay to Lender on the Closing Date
hereof the sum of $250,000, which may be paid out of Borrower's initial
borrowing under the Loan.

     10.2 ATTORNEY'S FEES AND OTHER FEES AND EXPENSES.  Whether or not any of 
the transactions contemplated by this Loan Agreement shall be consummated, 
Borrower agrees to pay to Lender on demand all fees paid or expenses incurred 
by Lender in connection with the transactions contemplated hereby and in 
connection with any amendments, modifications or waivers (whether or not the 
same become effective) under or in respect of any of the Loan Documents, 
including, without limitation:

          10.2.1 FEES AND EXPENSES FOR PREPARATION OF LOAN DOCUMENTS.  All
     reasonable fees, expenses and disbursements (including without limitation,
     charges for required lien searches, reproduction of documents, long
     distance telephone calls and overnight express carriers) of counsel
     retained by Lender in connection with the preparation and negotiation of
     any of the Loan Documents or any amendments, modifications or waivers
     hereto or thereto (whether or not the same become effective).

          10.2.2 FEES AND EXPENSES IN ENFORCEMENT OF RIGHTS OR DEFENSE OF LOAN
     DOCUMENTS.  Any reasonable attorneys' fees and expenses or other costs or
     expenses incurred by Lender in connection with the enforcement or
     collection against Borrower or Guarantor of any provision of any of the
     Loan Documents, and in connection with or arising out of any litigation,
     investigation or proceeding instituted by any Governmental Body or any
     other Person with respect to any of the Loan Documents, whether or not suit
     is instituted, including, but not limited to, such costs or expenses
     arising from the enforcement or collection against Borrower, of any
     provision of any of the Loan Documents in any state or federal bankruptcy
     or reorganization proceeding.

                                       25

<PAGE>

     10.3 INDEMNITY.  Borrower hereby agrees to indemnify and save Lender
harmless from the following:

          10.3.1 BROKERAGE FEES.  The fees, if any, of brokers and finders
     incurred by Borrower.

          10.3.2 OPERATION OF COLLATERAL; JOINT VENTURERS.  Any loss, cost,
     liability, damage or expense (including reasonable attorneys' fees and
     expenses) incurred in connection with the ownership, operation or
     maintenance of the Collateral, the construction of Lender and Borrower as
     having the relationship of joint venturers or partners or the determination
     that Lender or Borrower has acted as agent for the other.


                                      ARTICLE 11
                                           
                                    MISCELLANEOUS

     11.1 NOTICES.  Any notices, communications and waivers under this Loan
Agreement shall be in writing and shall be (i) delivered in person, (ii) mailed,
postage prepaid, either by registered or certified mail, return receipt
requested, (iii) by overnight express carrier, or (iv) by facsimile
transmission, addressed in each case as follows:

     To Lender:          LaSalle National Bank
                         135 South LaSalle Street
                         Chicago, Illinois 60603
                         Attn:     John C. Hein
                         Facsimile No.: (312)904-6691

     With copy to:       Schwartz, Cooper, Greenberger & Krauss
                         180 North LaSalle Street, Suite 2700
                         Chicago, Illinois  60601
                         Attn: Robert A. Smoller, Esq.
                         Facsimile No.: (312) 782-8416

     To Borrower:        Prime Group VI, L.P.
                         c/o The Prime Group, Inc.
                         77 West Wacker Drive
                         Suite 3900 (Suite 4200 after February 1, 1999)
                         Chicago, Illinois 60601
                         Attn: Michael W. Reschke
                         Facsimile No.: (312)917-1511

                                       26

<PAGE>

     With copies to:     Winston & Strawn
                         35 West Wacker Drive
                         Chicago, Illinois 60601
                         Attn: Wayne D. Boberg, Esq.
                         Facsimile No.: (312)558-5700

     And to:             The Prime Group, Inc.
                         77 West Wacker Drive
                         Suite 4200
                         Chicago, Illinois 60601
                         Attn: Robert J. Rudnik, Esq.
                         Facsimile No.: (312)917-8442

or to any other address as to any of the parties hereto, as such party shall
designate in a written notice to the other party hereto.  All notices sent
pursuant to the terms of this Section shall be deemed received (i) if personally
delivered, then on the date of delivery, (ii) if sent by overnight, express
carrier, then on the next federal banking day immediately following the day
sent, (iii) if sent by registered or certified mail, then on the earlier of the
third federal banking day following the day sent or when actually received, or
(iv) if sent by facsimile transmission, when transmitted to the facsimile number
specified in this Section and confirmation of receipt is received.

     11.2 SURVIVAL OF LOAN AGREEMENT.  All covenants, agreements,
representations and warranties made in this Loan Agreement and in the
certificates delivered pursuant hereto shall survive the making by Lender of the
Loan and the execution and delivery to Lender of the Note and of all other Loan
Documents and shall continue in full force and effect so long as any of
Borrower's Obligations remain outstanding, unperformed or unpaid.

     11.3 FURTHER ASSURANCE.  From time to time, Borrower shall execute and
deliver to Lender such additional documents as Lender may require to carry out
the purposes of the Loan Documents and to protect Lender's rights thereunder.

     11.4 TAXES AND FEES.  Should any tax (other than taxes based upon the net
income of Lender), recording or filing fees become payable in respect of any of
the Loan Documents, or any amendment, modification or supplement thereto,
Borrower agrees to pay the same to Lender promptly after demand, but in no event
after 15 Business Days from the date of demand, together with any interest or
penalties thereon and agrees to hold Lender harmless with respect thereto.

     11.5 SEVERABILITY.  In the event that any provision of this Loan Agreement
is deemed to be invalid by reason of the operation of law, or by reason of the
interpretation placed thereon by any administrative agency or any court, this
Loan Agreement shall be construed as not containing such provision, and the
invalidity of such provision shall not affect the validity of any other
provisions hereof, and any and all other provisions hereof which otherwise are
lawful and valid shall remain in full force and effect.

                                       27

<PAGE>

     11.6 WAIVER.  No delay on the part of Lender in exercising any right, power
or privilege hereunder shall operate as a waiver thereof, and no single or
partial exercise of any right, power or privilege hereunder shall preclude other
or further exercise thereof, or be deemed to establish a custom or course of
dealing or performance between the parties hereto, or preclude the exercise of
any other right, power or privilege.

     11.7 MODIFICATION OF LOAN DOCUMENTS.  No modification or waiver of any
provision of any of the Loan Documents shall be effective unless the same shall
be in writing, and then such waiver or consent shall be effective only in the
specific instance and for the purpose for which given.  No notice to or demand
on Borrower in any case shall entitle Borrower to any other or further notice or
demand in the same, similar or other circumstances.

     11.8 CAPTIONS.  The headings in this Loan Agreement are for purposes of
reference only and shall not limit or otherwise affect the meaning hereof.

     11.9 SALE OF INTEREST.  Borrower may not sell, assign or transfer this Loan
Agreement or any portion thereof, including, without limitation, Borrower's
right, title, interest, remedies, powers, and/or duties hereunder or thereunder.
Borrower hereby consents to Lender's sale, assignment, transfer or other
disposition of this Loan Agreement or of any portion hereof or thereof, at any
time or times after an Event of Default has occurred, including, without
limitation, Lender's right, title, interest, remedies, powers, and/or duties
hereunder or thereunder.  Borrower hereby consents to Lender's participation of
this Loan Agreement at any time prior to an Event of Default so long as Lender
retains at least a 50% participating interest in this Loan Agreement.  Borrower
acknowledges and agrees that any and all such assignees or participants may be
provided with information concerning Borrower, its operations, business and
financial condition and this Loan Agreement which have been or would be provided
to Lender.

     11.10 SUCCESSORS AND ASSIGNS.  This Loan Agreement shall be binding upon
and inure to the benefit of and be enforceable by the parties hereto and their
respective successors and assigns.

     11.11 REMEDIES CUMULATIVE.  All rights and remedies of Lender pursuant to
this Loan Agreement, any other Loan Documents or otherwise, shall be cumulative
and non-exclusive, and may be exercised singularly or concurrently.  One or more
successive actions may be brought against Borrower as often as Lender deems
advisable, until all of Borrower's Obligations are paid and performed in full.

     11.12 ENTIRE AGREEMENT.  This Loan Agreement and the other Loan Documents
executed prior or pursuant hereto constitute the entire agreement between the
parties hereto with respect to the transactions contemplated hereby or thereby
and supersede any prior agreements, whether written or oral, relating to the
subject matter hereof.

     11.13 APPLICABLE LAW.  THE LOAN DOCUMENTS SHALL BE CONSTRUED IN ACCORDANCE
WITH AND GOVERNED BY THE LAWS AND

                                       28

<PAGE>

DECISIONS OF THE STATE OF ILLINOIS (OTHER THAN CHOICE OF LAW PROVISIONS), 
UNLESS OTHERWISE PROVIDED THEREIN.

     11.14 JURISDICTION AND VENUE.  BORROWER HEREBY AGREES THAT ALL ACTIONS OR
PROCEEDINGS INITIATED BY BORROWER AND ARISING DIRECTLY OR INDIRECTLY OUT OF THE
LOAN DOCUMENTS SHALL BE LITIGATED IN THE CIRCUIT COURT OF COOK COUNTY, ILLINOIS,
OR THE UNITED STATES DISTRICT COURT FOR THE NORTHERN DISTRICT OF ILLINOIS OR, IF
LENDER INITIATES SUCH ACTION, ANY COURT IN WHICH LENDER SHALL INITIATE SUCH
ACTION, TO THE EXTENT SUCH COURT HAS JURISDICTION.  BORROWER HEREBY EXPRESSLY
SUBMITS AND CONSENTS IN ADVANCE TO SUCH JURISDICTION IN ANY ACTION OR PROCEEDING
COMMENCED BY LENDER IN ANY OF SUCH COURTS.  BORROWER WAIVES ANY CLAIM THAT
CHICAGO, ILLINOIS OR THE NORTHERN DISTRICT OF ILLINOIS IS AN INCONVENIENT FORUM
OR AN IMPROPER FORUM BASED ON LACK OF VENUE.  THE EXCLUSIVE CHOICE OF FORUM FOR
BORROWER SET FORTH IN THIS SECTION SHALL NOT BE DEEMED TO PRECLUDE THE
ENFORCEMENT, BY LENDER, OF ANY JUDGMENT OBTAINED IN ANY OTHER FORUM OR THE
TAKING, BY LENDER, OF ANY ACTION TO ENFORCE THE SAME IN ANY OTHER APPROPRIATE
JURISDICTION.

     11.15 WAIVER OF RIGHT TO JURY TRIAL.  LENDER AND BORROWER ACKNOWLEDGE AND
AGREE THAT ANY CONTROVERSY WHICH MAY ARISE UNDER ANY OF THE LOAN DOCUMENTS OR
WITH RESPECT TO THE TRANSACTIONS CONTEMPLATED THEREBY WOULD BE BASED UPON
DIFFICULT AND COMPLEX ISSUES AND THEREFORE, THE PARTIES AGREE THAT ANY COURT
PROCEEDING ARISING OUT OF ANY SUCH CONTROVERSY WILL BE TRIED IN A COURT OF
COMPETENT JURISDICTION BY A JUDGE SITTING WITHOUT A JURY.

     11.16 NON-RECOURSE.  Notwithstanding anything to the contrary contained
herein, Lender agrees that no limited partner, agent, director, officer or
employee of Borrower shall be personally liable to Lender for the payment of the
Loan or performance of any of Borrower's Obligations or any other obligations
hereunder, under the Note or under any of the other Loan Documents, or with
respect to the Loan, and recourse hereunder, under the Note and under any other
Loan Documents (including, without limitation, with respect to the
representations and warranties contained herein or therein) shall be limited to
the Collateral.  It is understood that the preceding sentence shall not (i) in
the event of any malfeasance, such as fraud, misappropriation of funds or
intentional misrepresentation, estop Lender from instituting or prosecuting a
legal action or proceeding or otherwise making a claim against the Person or
Persons committing such malfeasance, or (ii) constitute a waiver, release or
discharge of any of Borrower's Obligations, and the same shall continue until
paid or discharged in full.

        [BALANCE OF PAGE INTENTIONALLY LEFT BLANK; SIGNATURE PAGE FOLLOWS.]

                                       29

<PAGE>

     This Loan Agreement has been executed and delivered by each of the parties
hereto by a duly authorized officer of each such party on the date first set
forth above.

                         PRIME GROUP VI, L.P., an Illinois limited partnership

                         By:  PGLP, Inc., an Illinois corporation, as managing
                              general partner


                              By:      /s/ ROBERT J. RUDNIK
                                 ---------------------------------------------
                              Name:        ROBERT J. RUDNIK
                                   -------------------------------------------
                              Title:       VICE PRESIDENT
                                    ------------------------------------------



                         LASALLE NATIONAL BANK, a national banking association


                         By:           /s/ JOHN C. HEIN
                            --------------------------------------------------

                         Name:             JOHN C. HEIN
                              ------------------------------------------------

                         Title:      FIRST VICE PRESIDENT
                               -----------------------------------------------


<PAGE>

                                                                EXHIBIT A



                                   FORM OF GUARANTY

<PAGE>

                                                                EXHIBIT B



                                     FORM OF NOTE

<PAGE>

                                                                EXHIBIT C


                               FORM OF PLEDGE AGREEMENT


<PAGE>

          FIRST AMENDMENT TO LOAN DOCUMENTS, CONSENT AND LIMITED RELEASE 

     THIS FIRST AMENDMENT TO LOAN DOCUMENTS, CONSENT AND LIMITED RELEASE 
(this "Amendment") is dated as of January 29, 1999 and is by and between 
Prime Group VI, L.P., an Illinois limited partnership (the "Borrower"), and 
LaSalle National Bank (the "Lender").

                                W I T N E S S E T H:

     WHEREAS, the Borrower and the Lender entered into that certain Loan 
Agreement, dated as of December 18, 1998 (as amended, restated, modified or 
supplemented and in effect from time to time, the "Loan Agreement"), pursuant 
to which the Lender extended certain credit facilities to Borrower (all such 
extensions of credit collectively referred to herein as the "Loans"), upon 
the terms and subject to the conditions set forth therein (capitalized terms 
used herein without definition shall have the meanings ascribed to such terms 
in the Loan Agreement); and

     WHEREAS, as security for the Loans, Borrower executed and delivered that 
certain Pledge Agreement to the Lender, dated as of December 18, 1998 (as 
amended, restated, modified or supplemented and in effect from time to time, 
the "Pledge Agreement"); and

     WHEREAS, Borrower has requested that the Lender release the AIMCO Shares 
pledged as Collateral under the Pledge Agreement and consent to Borrower (i) 
selling the pledged AIMCO Shares and (ii) using the proceeds of the AIMCO 
Sale to purchase 256,572 Prime Group Realty Partnership Units (the 
"Additional Partnership Units") to be pledged to Lender in substitution for 
the pledged AIMCO Shares; and

     WHEREAS, the Lender is willing to release the pledged AIMCO Shares and 
consent to their sale, subject to Borrower (i) consummating the sale of the 
AIMCO Shares, (ii) purchasing the Additional Partnership Units, (iii) 
pledging the Additional Partnership Units, (iv) delivering unit certificates 
evidencing the Additional Partnership Units to Lender as Collateral for the 
Loans, and (v) amending Lender's existing Uniform Commercial Code financing 
statements covering the Collateral, on the terms and conditions contained 
herein;

     NOW, THEREFORE, for good and valuable consideration, the receipt and 
sufficiency of which are hereby acknowledged, the Borrower and Lender hereby 
agree as follows:

     1. The Lender hereby agrees to release its lien on the AIMCO Shares 
pledged to the Lender pursuant to the Pledge Agreement as Collateral for the 
Loans, and hereby consents to the sale of the AIMCO Shares, subject to the 
following conditions:

          a)   the Borrower shall sell the released AIMCO Shares (the "Released
          Shares") through an investment account with ABN AMRO Incorporated (the
          "ABN AMRO Account") for which the Borrower, the Lender and ABN AMRO 
          Incorporated have entered into a restricted account agreement to 
          evidence and perfect the 

                                       1

<PAGE>

          Lender's security interest in the Released Shares and all proceeds of,
          and substitutions for, the Released Shares;

          a)   all proceeds from the sale of the Released Shares shall be held
          in the ABN AMRO Account until the Borrower consummates the purchase of
          the Additional Partnership Units;

          a)   the Borrower shall direct the seller of the Additional
          Partnership Units to deliver the certificates evidencing the
          Additional Partnership Units to the ABN AMRO Account immediately upon
          consummation of the purchase of the Additional Partnership Units;

          a)   the Borrower shall direct ABN AMRO Incorporated to deliver the
          certificates evidencing the Additional Partnership Units to the Lender
          upon ABN AMRO Incorporated's receipt of the Additional Partnership
          Units; and

          a)   concurrently with the execution of this Amendment, the Borrower
          shall deliver to Lender an assignment separate from certificate
          executed in blank with respect to each certificate evidencing the
          Additional Partnership Units.

     2. The Loan Agreement is hereby amended by deleting Paragraph 5.15 and 
by deleting all reference elsewhere in the Loan Agreement to "Apartment 
Investment and Management Company," "AIMCO," and "AIMCO Shares."

     3. The Pledge Agreement is hereby amended as follows:

          a)   by deleting all reference to "Apartment Investment and Management
          Company," "AIMCO," and "AIMCO Stock"; and

          a)   by deleting Schedule 1 thereto in its entirety and, upon purchase
          of the Additional Partnership Units, replacing it with a new 
          "Schedule 1" substantially in the form attached hereto.

     4. The Prime Group, Inc., an Illinois corporation, hereby ratifies its
obligations under that certain Continuing Unconditional Guaranty, dated December
18, 1998, given by The Prime Group, Inc. in favor of the Lender.

     5. The Borrower hereby represents and warrants that its execution, delivery
and performance of this Amendment, the Pledge Agreement and the Loan Agreement
(both as amended hereby) are within its partnership powers and have been duly
authorized by all requisite partnership action on its part and that this
Amendment has been duly executed by Borrower and this Amendment, the Pledge
Agreement and the Loan Agreement (both as amended hereby) constitute valid and
binding obligations of the Borrower, enforceable in accordance with their
respective terms, except as such enforceability may be limited by applicable
bankruptcy, insolvency, moratorium, reorganization and other similar laws
affecting creditors' rights 

                                       2
<PAGE>

generally and by general principles of equity.

     6. The parties hereto hereby agree and acknowledge that nothing 
contained in this Amendment in any manner or respect limits or terminates any 
of the provisions of the Pledge Agreement or the Loan Agreement other than as 
expressly set forth herein and further agree and acknowledge that the Pledge 
Agreement and the Loan Agreement both remain and continue in full force and 
effect.

     7. This Amendment may be executed in one or more counterparts, each of 
which, when executed and delivered, shall be deemed to be an original and all 
of which counterparts, taken together, shall constitute but one and the same 
document with the same force and effect as if the signatures of all of the 
parties were on a single counterpart.

     8. This Amendment, taken with the Pledge Agreement and the Loan 
Agreement, embodies the entire agreement and understanding with respect to 
the subject matter hereof and supersedes all prior agreements and 
understandings relating to the subject matter hereof.  Any reference to the 
Pledge Agreement or the Loan Agreement (howsoever each may be called) 
contained in any notice, request, certificate or other document shall be 
deemed to refer to the Pledge Agreement and the Loan Agreement, respectively, 
as amended by this Amendment unless the context shall otherwise expressly 
specify.

     9. This Amendment shall be governed by and construed in accordance with 
the laws of the State of Illinois.

        [Balance of page intentionally left blank; signature page follows.]

                                       3

<PAGE>

     IN WITNESS WHEREOF, the parties hereto have executed this First 
Amendment to Loan Documents, Consent and Limited Release as of the date first 
written above.

                              PRIME GROUP VI, L.P.

                              By:  PGLP, Inc., an Illinois corporation, as
                                   managing general partner

                                   By:    /s/ ROBERT J. RUDNIK
                                      ----------------------------
                                   Name:      ROBERT J. RUDNIK
                                        --------------------------
                                   Title:      VICE PRESIDENT
                                         -------------------------



                              LASALLE NATIONAL BANK

                              By:     /s/ JOHN C. HEIN
                                 ---------------------------------
                              Name:       JOHN C. HEIN
                                   -------------------------------
                              Title:  FIRST VICE PRESIDENT
                                    ------------------------------



Agreed to and Accepted as of the
29th day of January, 1999:
- ----

THE PRIME GROUP, INC.

By:     /s/ ROBERT J. RUDNIK
   ------------------------------
Name:       ROBERT J. RUDNIK
     ----------------------------
Title:  EXECUTIVE VICE PRESIDENT
      ---------------------------

<PAGE>

                                     SCHEDULE I

                         DESCRIPTION OF PLEDGED COLLATERAL


A.   PLEDGED SHARES

<TABLE>
<CAPTION>

Issuer                              Certificate No.                     Shares
- ------                              --------------                      ------
<S>                                    <C>                            <C>
Brookdale Living Communities, Inc.      C0008                            137,000
                                        C0009                            137,000
                                        C0010                            137,000
                                        C0011                            137,000
                                        C0012                            137,000
                                        C0013                            137,000
                                        C0014                            137,000
                                        C0015                            137,000
                                        C0016                            137,000
                                        C0017                            137,000
                                        C0035                            300,000
                                        C0043                            673,327
                                        C0046                          1,233,606
                                                                       ---------
                                                                       3,576,933
</TABLE>

B.   PLEDGED UNITS

     104,632 aggregate units of limited partnership interests in Prime Retail,
     L.P., a Delaware limited partnership, as evidenced by certificates #0027
     for 43,000 units and #0028 for 61,632 units.

     304,097 units of limited partnership interests in Prime Group Realty, L.P.,
     a Delaware limited partnership, as evidenced by certificates ___________


<PAGE>

                                   PLEDGE AGREEMENT


          THIS PLEDGE AGREEMENT (this "AGREEMENT"), dated as of December 18, 
1998, is by and between PRIME GROUP VI, L.P., an Illinois limited partnership 
(the "PLEDGOR"), and LaSalle National Bank (the "PLEDGEE").

                                 W I T N E S S E T H

          WHEREAS, the Pledgor and the Pledgee are parties to that certain 
Loan Agreement, dated as of December 18, 1998, as it may be amended from time 
to time (the "LOAN AGREEMENT"), pursuant to which the Pledgee has agreed to 
extend loans and certain other financial accommodations to the Pledgor;

          WHEREAS, the Pledgor presently owns 115,000 shares of class A 
common stock, $0.01 par value per share ("AIMCO STOCK"), of Apartment 
Investment and Management Company, a Maryland corporation that qualifies as a 
real estate investment trust ("AIMCO"), 3,576,933 shares of common stock, 
$0.01 par value per share ("BROOKDALE STOCK"), of Brookdale Living 
Communities, Inc., a Delaware corporation ("BROOKDALE"), 104,632 Common Units 
of partnership interest ("PRIME RETAIL PARTNERSHIP UNITS") in Prime Retail, 
L.P., a Delaware limited partnership ("PRIME RETAIL OPERATING PARTNERSHIP") 
and 47,525 Common Units of partnership interest ("PRIME GROUP REALTY 
PARTNERSHIP UNITS") in Prime Group Realty, L.P., a Delaware limited 
partnership ("PRIME GROUP REALTY OPERATING PARTNERSHIP"). Collectively, the 
AIMCO Stock, the Brookdale Stock, the Prime Retail Partnership Units and the 
Prime Group Realty Partnership Units are referred to herein as the "PRIME 
SECURITIES";

          WHEREAS, pursuant to the Third Amended and Restated Agreement of 
Limited Partnership of the Prime Retail Operating Partnership dated as of 
October 15, 1998 (as amended, modified or restated from time to time, the 
"PRIME RETAIL PARTNERSHIP AGREEMENT"), the Prime Retail Partnership Units may 
be exchanged one share of Prime Retail Partnership Units for one share of 
common stock, par value $0.01 per share ("PRIME RETAIL STOCK"), of Prime 
Retail, Inc., a Maryland corporation that has qualified for treatment as a 
real estate investment trust ("PRIME RETAIL, INC.");

          WHEREAS, pursuant to the Amended and Restated Agreement of Limited 
Partnership of the Prime Group Realty Operating Partnership dated as of 
November 17, 1998 (as amended, modified or restated from time to time, the 
"PRIME GROUP REALTY PARTNERSHIP AGREEMENT"), the Prime Group Realty 
Partnership Units may be exchanged one unit of Prime Group Realty Partnership 
Units for one share of common stock, par value $0.01 per share ("PRIME GROUP 
REALTY STOCK"), of Prime Group Realty Trust, a Maryland corporation that has 
qualified for treatment as a real estate investment trust ("PGRT");

          WHEREAS, the Pledgor has agreed to grant the Pledgee a security 
interest in the AIMCO Stock and the Brookdale Stock (collectively, the 
"PLEDGED SHARES"), and the Prime Retail 

<PAGE>

Partnership Units and the Prime Group Realty Partnership Units (collectively, 
the "PLEDGED UNITS"), more fully described on Schedule I.

          NOW, THEREFORE, for good and valuable consideration, the receipt, 
sufficiency and adequacy of which are hereby acknowledged, the Pledgor hereby 
agrees as follows:

     1.   PLEDGE.  The Pledgor hereby pledges to the Pledgee, and grants to 
the Pledgee a security interest in, the following (the "PLEDGED COLLATERAL"):

          (a)  the Pledged Shares now owned by the Pledgor and the certificates,
     if any, representing such Pledged Shares, and all dividends, cash,
     securities, instruments, rights and other property from time to time
     received, receivable or otherwise distributed in respect of or in exchange
     for any or all of such Pledged Shares; 

          (b)  the Pledged Units now owned by the Pledgor and the certificates,
     if any, representing such Pledged Units, the Pledgor's interest in the
     capital, income, profits and distributions of the Prime Retail Operating
     Partnership and the Prime Group Realty Operating Partnership attributable
     to such Pledged Units, and all other cash, securities, instruments and
     other property from time to time received, receivable or otherwise
     distributed in respect of or in exchange for any or all of the Pledged
     Units;

          (c)  all additional shares of Prime Securities and other securities
     acquired by the Pledgor in any manner with respect to the Pledged Shares
     and the Pledged Units (including, but not limited to, Prime Retail Stock
     for which Prime Retail Partnership Units are exchanged, and Prime Group
     Realty Shares for which Prime Group Realty Partnership Units are
     exchanged), and the certificates, if any, representing such additional
     securities (any such additional securities shall constitute part of the
     Pledged Shares or the Pledged Units, as the case may be, under and as
     defined in this Agreement), and all dividends, cash, instruments,
     subscription warrants, securities and any other rights and options and
     other property from time to time received, receivable or otherwise
     distributed in respect of or in exchange for any or all of such securities;
     and

          (d)  all other property hereafter delivered to the Pledgee in
     substitution for, as proceeds of, or in addition to any of the foregoing
     and all certificates, instruments and documents representing or evidencing
     such property, and all cash, securities, interest, dividends, rights and
     other property at any time and from time to time received, receivable or
     otherwise distributed in respect of or in exchange for or upon conversion
     of any or all thereof.

     2.   SECURITY FOR OBLIGATIONS.  The Pledged Collateral secures the 
payment of all of the Pledgor's "Borrower's Obligations", as such term is 
defined in the Loan Agreement, to the Pledgee, whether for principal, 
interest, fees, expenses or otherwise, and all obligations of the Pledgor now 
or hereafter existing under this Agreement (such Borrower's Obligations under 
the Loan Agreement 

                                       2
<PAGE>

and all such obligations of the Pledgor now or hereafter existing under this 
Agreement being referred to herein as the "OBLIGATIONS").

   3.     DELIVERY OF PLEDGED COLLATERAL.

          (a)  All certificates, instruments or documents, if any, representing
     or evidencing the Pledged Collateral shall be delivered to and held by or
     on behalf of the Pledgee pursuant hereto and shall be in suitable form for
     transfer by delivery, shall be accompanied by duly executed instruments of
     transfer or assignment in blank, all in form and substance satisfactory to
     the Pledgee.  In the event any or all of the Pledged Collateral are
     evidenced by a book entry, Pledgor shall execute and deliver to Pledgee
     such documents as are required by Pledgee to create and perfect a security
     interest in such uncertificated Pledged Collateral.  In addition, the
     Pledgee shall have the right at any time to exchange certificates or
     instruments representing or evidencing Pledged Collateral for certificates
     or instruments of smaller or larger denominations.

          (b)  Pledgor shall, and shall cause other appropriate parties under
     Section 8-313 and 8-321 of the Uniform Commercial Code as in effect on the
     date hereof in the State of Illinois (the "CODE") to, mark it or their
     books and records with the numbers and face amounts of all uncertificated
     securities evidencing the Pledged Shares and/or the Pledged Units, as
     applicable, and all rollovers and replacements therefor to reflect the
     security interests granted pursuant to Section 2 hereof.  Pledgor shall
     provide Pledgee and shall cause other persons to provide Pledgee with
     written confirmation of the security interest in such uncertificated
     securities.  Pledgor shall take, and shall cause all other necessary
     persons to take, all action necessary or appropriate to create, perfect and
     maintain a first perfected priority lien in such uncertificated securities
     in favor of Pledgee.  In the event that subsequent to the date hereof, the
     Pledged Shares and/or Pledged Units, as applicable, are evidenced by
     certificates, Pledgor will promptly deliver such certificates to Pledgee,
     together with an assignment duly endorsed in blank for transfer.

     4.   REPRESENTATIONS AND WARRANTIES.  The Pledgor represents and warrants
as follows:

          (a)  The Brookdale Stock and the Pledged Units have been duly
     authorized and validly issued and are fully paid and nonassessable.  The
     Prime Retail Stock to be issued upon the conversion of the Prime Retail
     Partnership Units, and the Prime Group Realty Stock to be issued upon the
     conversion of the Prime Group Realty Partnership Units, has been duly
     authorized and will be, upon conversion, fully paid and nonassessable.

          (b)  The Pledgor is, or at the time of any future delivery, pledge,
     assignment or transfer will be, the legal and beneficial owner of the
     Pledged Collateral, free and clear of any lien, security interest, pledge,
     warrant, option, purchase agreement, shareholders' agreement, restriction,
     redemption agreement or other charge, encumbrance or restriction of any
     nature on the Pledged Collateral (except for the lien created by this
     Agreement, the restrictions imposed by the agreements listed on Schedule II
     hereto, completed copies of which have been delivered to Pledgor, and the
     liens permitted by the Loan Agreement), with 

                                       3

<PAGE>

     full right to deliver, pledge, assign and transfer the Pledged Collateral
     to the Pledgee as Pledged Collateral hereunder.

          (c)  The Brookdale Stock was acquired and fully paid for by an
     affiliate of the Pledgor on ________________, ____ in a transaction exempt
     from the registration provisions of the Securities Act of 1933, as amended
     (the "SECURITIES ACT").

          (d)  The AIMCO Stock was acquired and fully paid for by an affiliate
     of the Pledgor on ________________, ____ in a transaction exempt from the
     registration provisions of the Securities Act.

          (e)  Subject to compliance with the agreements listed on Schedule II
     hereto, the Pledged Units can be exchanged at any time at the rate of one
     unit of Prime Retail Partnership Unit for one share of Prime Retail Stock,
     and one unit of Prime Group Realty Partnership Unit for one share of Prime
     Group Realty Stock.

          (f)  Upon (i) filing of the UCC financing statements, forms of which
     are attached hereto as Exhibit A, with the Secretary of State of Illinois
     and the Secretary of State of Maryland, (ii) execution and delivery of the
     Acknowledgment and Consent, dated as of even date herewith, among Pledgor,
     Prime Retail Operating Partnership, Prime Retail, Inc. and Pledgee, (iii)
     execution and delivery of the Acknowledgment and Consent, dated as of even
     date herewith, among Pledgor, Prime Group Realty Operating Partnership,
     PGRT, Prudential Securities Incorporated and Pledgee, and (iv) possession
     by Pledgee of the certificates representing the Pledged Collateral, the
     pledge of the Pledged Collateral pursuant to this Agreement will create a
     valid, perfected and first security interest in the Pledged Collateral,
     securing the payment of the Obligations.  All other filings, registrations,
     recordings and other actions necessary or desirable to create, perfect and
     protect such security interest have been duly taken, and such security
     interests are entitled to all of the rights, priorities and benefits
     afforded by the Code or other relevant law as enacted in any relevant
     jurisdiction which relates to perfected security interests.

          (g)  Except as otherwise set forth in paragraph (g) above, no
     authorization, approval, or other action by, and no notice to or filing
     with, any governmental authority or regulatory body is required either 
     (i) for the pledge by the Pledgor of the Pledged Collateral pursuant to 
     this Agreement or for the execution, delivery or performance of this 
     Agreement by the Pledgor, or (ii) for the exercise by the Pledgee of the
     voting or other rights provided for in this Agreement or the remedies in
     respect of the Pledged Collateral pursuant to this Agreement (except as may
     be required in connection with a disposition of such Pledged Collateral by
     laws affecting the offering and sale of securities generally).

          (h)  The Pledgor has full power and authority to enter into this
     Agreement and has the right to pledge and grant a security interest in the
     Pledged Collateral as provided by this Agreement.

                                       4

<PAGE>

     5.   FURTHER ASSISTANCE.  The Pledgor agrees that at any time and from 
time to time, at the expense of the Pledgor, the Pledgor will promptly 
execute and deliver, or cause to be executed and delivered, all certificates, 
stock powers, proxies, assignments, instruments and documents; and will take 
all further action that may be reasonably necessary or desirable, or that the 
Pledgee may reasonably request, in order to perfect and protect any security 
interest granted or purported to be granted hereby or to enable the Pledgee 
to exercise and enforce its rights and remedies hereunder with respect to any 
Pledged Collateral and to carry out the provisions and purposes hereof.

     6.   VOTING RIGHTS; DIVIDENDS; ETC.

          (a)  Except as set forth below, so long as no Event of Default (as
     hereinafter defined):

               (i)   The Pledgor shall be entitled to exercise any and all
          voting and other consensual rights pertaining to the Pledged
          Collateral or any part thereof for any purpose not inconsistent with
          the terms of this Agreement or the Loan Agreement; PROVIDED, HOWEVER,
          that the Pledgor shall not exercise nor shall it refrain from
          exercising any such right if such action or inaction could have a
          material adverse effect on the value of the Pledged Collateral or upon
          the rights of the Pledgee to effectively realize upon the security
          afforded by such Pledged Collateral.

               (ii)  The Pledgor shall be entitled to receive and retain any and
          all dividends and interest paid in respect of the Pledged Shares and
          all distributions paid in respect of the Pledged Units, PROVIDED
          HOWEVER, that any and all

               (1)   dividends, interest and distributions paid or payable other
                     than in cash in respect of, and instruments and other
                     property received, receivable or otherwise distributed in
                     respect of, or in exchange for, any Pledged Collateral,

               (2)   dividends and other distributions paid or payable in cash
                     in respect of any Pledged Collateral in connection with a
                     partial or total liquidation or dissolution or in
                     connection with a reduction of capital, capital surplus or
                     paid-in-surplus resulting from a sale or refinancing of any
                     property, and

               (3)   cash paid, payable or otherwise distributed in redemption
                     of, or in exchange for, any Pledged Collateral,

          shall be Pledged Collateral, shall be forthwith delivered to the
          Pledgee to hold as Pledged Collateral and shall, if received by the
          Pledgor, be received in trust for the benefit of the Pledgee, be
          segregated from the other property or funds of the Pledgor, and be
          forthwith delivered to the Pledgee as Pledged Collateral in the same
          form as so received (with any necessary endorsement).

                                       5

<PAGE>

          (b)  Except as set forth below, upon the occurrence (and during the
     continuance) of an Event of Default (as hereinafter defined):

               (i)   All rights of the Pledgor to exercise the voting and other
          consensual rights which it would otherwise be entitled to exercise
          pursuant to Section 6(a)(i) (but only after an Event of Default) and
          to receive the dividends and interest payments and distributions which
          it would otherwise be authorized to receive and retain pursuant to
          Section 6(a)(ii) shall cease, and all such rights shall thereupon
          become vested in the Pledgee which shall thereupon have the sole right
          to exercise such voting and other consensual rights and to receive and
          hold as Pledged Collateral such dividends and interest payments and
          distributions;

               (ii)  All dividends and interest payments and distributions which
          are received by the Pledgor contrary to the provisions of paragraph
          (i) of this Section 6(b) shall be received in trust for the benefit of
          the Pledgee, shall be segregated from other funds of the Pledgor and
          shall be forthwith paid over to the Pledgee as Pledged Collateral in
          the same form as so received (with any necessary endorsements); and

               (iii) The Pledgor shall execute and deliver (or cause to be
          executed and delivered) to the Pledgee all such proxies and other
          instruments as the Pledgee may (reasonably) request for the purpose of
          enabling the Pledgee to exercise the voting and other rights which it
          is entitled to exercise pursuant to paragraph (i) above and to receive
          the dividends or interest payments or distribution which it is
          authorized to receive pursuant to paragraph (ii) above.

     7.   TRANSFERS AND OTHER LIENS; ADDITIONAL SHARES.  The Pledgor agrees 
that it will not (i) sell, assign, transfer, convey, exchange, pledge, 
hypothecate or otherwise dispose of, or grant any option, warrant, right, 
contract or commitment with respect to, any of the Pledged Collateral without 
the prior written consent of the Pledgee, or (ii) create or permit to exist 
any lien, security interest, pledge, proxy, purchase arrangement, 
restriction, redemption agreements, shareholders' agreement or other charge 
or encumbrance upon or with respect to any of the Pledged Collateral, except 
for the lien created by this Agreement, restrictions imposed by the 
agreements listed on Schedule II hereto and liens permitted by the Loan 
Agreement.

     8.   APPLICATION OF PROCEEDS OF SALE OR CASH HELD AS COLLATERAL.  All 
proceeds from the sale of Pledged Collateral sold pursuant to this Agreement 
and/or the cash held as Pledged Collateral hereunder shall be (a) retained by 
the Pledgee as cash collateral for the Obligations, or (b) at the election of 
the Pledgee, applied by the Pledgee as follows:

               FIRST:  to payment of the costs and expenses of such sale, 
including the out-of-pocket expenses of the Pledgee, including the reasonable 
fees and out-of-pocket expenses of counsel employed in connection therewith, 
and to the payment of all advances made by the Pledgee for the account of the 
Pledgor hereunder, and the payment of all costs and expenses incurred by the 
Pledgee in connection with the administration and enforcement of this 
Agreement, to the extent that such advances, costs and expenses shall not 
have been reimbursed to the Pledgee;

                                       6

<PAGE>

               SECOND:  to the payment of interest accrued and unpaid, if 
any, on any of the Obligations to and including the date of such application 
and then to the payment or prepayment of principal of any of the Obligations 
and then to the payment of the balance of the Obligations in such order as 
Pledgee may determine in its sole discretion; and

               THIRD:  the balance, if any, of such proceeds shall be paid to 
the Pledgor, or its successors or assigns, or as a court of competent 
jurisdiction may direct.

     9.   THE PLEDGEE APPOINTED ATTORNEY-IN-FACT.  The Pledgor hereby 
appoints the Pledgee as the Pledgor's attorney-in-fact, with full authority 
in the place and stead of the Pledgor and in the name of the Pledgor or 
otherwise, from time to time after giving notice to Pledgee in the Pledgee's 
discretion to take any action and to execute any instrument which the Pledgee 
may deem necessary or advisable to accomplish the purposes of this Agreement, 
including, without limitation, (i) to receive, endorse and collect all 
instruments made payable to the Pledgor representing any dividend, interest 
payment or other distribution in respect of the Pledged Collateral or any 
part thereof and to give full discharge for the same and (ii) to exercise all 
rights, including conversion rights, with respect to such Pledged Collateral.

     10.  THE PLEDGEE MAY PERFORM.  If the Pledgor fails to perform any 
agreement contained herein, the Pledgee may itself perform, or cause 
performance of, such agreement, and the reasonable expenses of the Pledgee 
incurred in connection therewith shall be payable by the Pledgor under 
Section 17.

     11.  REASONABLE CARE.  The Pledgee shall be deemed to have exercised 
reasonable care in the custody and preservation of the Pledged Collateral in 
its possession if the Pledged Collateral is accorded treatment substantially 
equal to that which the Pledgee accords its own property, it being understood 
that the Pledgee shall not have any responsibility for (i) ascertaining or 
taking action with respect to calls, conversions, exchanges, maturities, 
tenders or other matters relative to any Pledged Collateral, whether or not 
the Pledgee has or is deemed to have knowledge of such matters, or (ii) 
taking any necessary steps to preserve rights against any parties with 
respect to any Pledged Collateral; PROVIDED, HOWEVER, that upon the Pledgor's 
instruction, the Pledgee shall use reasonable efforts to take such action as 
the Pledgor directs the Pledgee to take with respect to calls, conversions, 
exchanges, maturities, tenders, rights against other parties or other similar 
matters relative to the Pledged Collateral, but failure of the Pledgee to 
comply with any such request shall not of itself be deemed a failure to 
exercise reasonable care, and no failure of the Pledgee to preserve or 
protect any rights with respect to the Pledged Collateral against prior 
parties, or to do any act with respect to preservation of the Pledged 
Collateral not so requested by the Pledgor, shall be deemed a failure to 
exercise reasonable care in the custody or preservation of the Pledged 
Collateral.

     12.  SUBSEQUENT CHANGES AFFECTING COLLATERAL.  The Pledgor represents to
the Pledgee that the Pledgor has made its own arrangements for keeping informed
of changes or potential changes affecting the Pledged Collateral (including, but
not limited to, rights to convert, rights to subscribe, payment of dividends or
distributions, reorganization or other exchanges, tender offers and voting
rights), and the Pledgor agrees that the Pledgee shall have no responsibility or
liability 

                                       7

<PAGE>

for informing the Pledgor of any such changes or potential changes or for 
taking any action or omitting to take any action with respect thereto.

     13.  EVENTS OF DEFAULT; REMEDIES UPON AN EVENT OF DEFAULT.

          (a)  The occurrence of any one or more of the following events shall
     constitute an "EVENT OF DEFAULT" by Pledgor under this Agreement:

               (i)   there occurs (and is continuing) an Event of Default under
          and as defined in the Loan Agreement;

               (ii)  the Pledged Shares and the Pledged Units shall not be
          exchangeable for shares of Prime Retail Stock or Prime Group Realty
          Stock as set forth in (and subject to the conditions in Section 4(e)
          hereof.

               (iii) the Pledgor fails to perform or observe any material term,
          covenant (after 5 day written notice) or agreement contained in this
          Agreement on its part to be performed or observed, or any
          representation or warranty made by the Pledgor in this Agreement shall
          be untrue or misleading in any material respect as of the date with
          respect to which such representation or warranty was made;

               (iv)  a notice of lien, levy or assessment is filed or recorded
          with respect to all or a substantial part of the Pledged Collateral,
          and such lien, levy or assessment is not released, discharged or
          removed within thirty (30) days from the date it is filed or recorded,
          except for a lien, levy or assessment which relates to current taxes
          not yet due and payable or a lien permitted by the Loan Agreement; and

               (v)   all or a substantial part of the Pledged Collateral is
          attached, seized, subjected to a writ or distress warrant, or is
          levied upon, or comes within the possession of any receiver, trustee,
          custodian or assignee for the benefit of creditors.

          (b)  If any Event of Default shall have occurred (and be continuing),
     the Pledgee shall have, in addition to all other rights given by law or by
     this Agreement, the Loan Agreement or otherwise, all of the rights and
     remedies with respect to the Pledged Collateral of a secured party under
     the Code in effect in the State of Illinois at that time, and the Pledgee
     may, without notice and at its option, transfer or register the Pledged
     Collateral or any part thereof on the books of the issuer thereof into the
     name of the Pledgee or the Pledgee's nominee(s), with or without any
     indication that such Pledged Collateral is subject to the security interest
     hereunder.  In addition, with respect to any Pledged Collateral which shall
     then be in or shall thereafter come into the possession or custody of the
     Pledgee, the Pledgee may sell or cause the same to be sold at any broker's
     board or at public or private sale, in one or more sales or lots, at such
     price or prices as the Pledgee may deem best, for cash or on credit or for
     future delivery, without assumption of any credit risk.  The purchaser of
     any or all Pledged Collateral so sold shall thereafter hold the same
     absolutely, free from any claim, encumbrance or right of any kind
     whatsoever, except for claims, encumbrances

                                       8
<PAGE>

     or rights that may arise without the knowledge or consent of the 
     Pledgor.  Unless any of the Pledged Collateral threatens to decline 
     speedily in value or is or becomes of a type sold on a recognized 
     market, the Pledgee will give the Pledgor reasonable notice of the time
     and place of any public sale thereof, or of the time after which any 
     private sale or other intended disposition is to be made.  Any sale 
     of the Pledged Collateral conducted in conformity with reasonable
     commercial practices of banks, insurance companies, commercial
     finance companies, or other financial institutions disposing of property
     similar to the Pledged Collateral shall be deemed to be commercially
     reasonable.  Any requirements of reasonable notice shall be met if such
     notice is mailed to the Pledgor as provided in Section 20 below, at least
     five (5) days before the time of the sale or disposition.  Any other
     requirement of notice, demand or advertisement for sale is, to the extent
     permitted by law, waived.  The Pledgee may, in its own name or in the name
     of a designee or nominee, buy any of the Pledged Collateral at any public
     sale and, if permitted by applicable law, at any private sale.  All
     expenses (including court costs and reasonable attorneys' fees and
     expenses) of, or incident to, the enforcement of any of the provisions
     hereof shall be recoverable from the proceeds of the sale or other
     disposition of Pledged Collateral.  In view of the fact that federal and
     state securities laws may impose certain restrictions on the method by
     which a sale of the Pledged Collateral may be effected after an Event of
     Default, the Pledgor agrees that upon the occurrence or existence of any
     Event of Default, the Pledgee may, from time to time, attempt to sell all
     or any part of the Pledged Collateral by means of a private placement,
     restricting the prospective purchasers to those who can make the
     representations and agreements required of purchasers of securities in
     private placements.  In so doing, the Pledgee may solicit offers to buy the
     Pledged Collateral, or any part of it, for cash, from a limited number of
     investors deemed by the Pledgee in its judgment, to be responsible parties
     who might be interested in purchasing the Pledged Collateral, and if the
     Pledgee solicits such offers from not less than three (3) such investors,
     then the acceptance by the Pledgee of the highest offer obtained therefrom
     shall be deemed to be a commercially reasonable method of disposition of
     the Pledged Collateral.

          In addition, upon the occurrence (and during the continuance) of an
     Event of Default, all rights of the Pledgor to exercise the voting and
     other rights which it would otherwise be entitled to exercise and to
     receive cash dividends and interest payments, shall cease, and all such
     rights shall thereupon become vested in the Pledgee as provided in Section
     6.

     14.  SECURITIES LAWS.  Pledgor hereby acknowledges and confirms that
Pledgee may be unable to effect a public sale of any or all of the Pledged
Shares and the Pledged Units by reason of certain prohibitions contained in the
Securities Act and applicable state securities laws and may be compelled to
resort to one or more private sales thereof to a restricted group of purchasers
who will be obligated to agree, among other things, to acquire any of the
Pledged Shares and Pledged Units for their own respective accounts for
investment and not with the view to the distribution or resale thereof.  Pledgor
further acknowledges and confirms that any such private sale may result in
prices or other terms less favorable to the seller than if such sale were a
public sale and, notwithstanding such circumstances, agrees that any such
private sale shall be deemed to have been made in a commercially reasonable
manner, and the Pledgee shall be under no obligation to take any steps in order
to permit the Pledged Shares and Pledged Units to be sold at a public sale.  The
Pledgee shall 

                                       9

<PAGE>

be under no obligation to delay a sale of any of the Pledged Shares and 
Pledged Units for any period of time necessary to permit any issuer thereof 
to register such Pledged Shares and Pledged Units for public sale under the 
Securities Act or under applicable state securities laws.

     15.  AUTHORITY OF THE PLEDGEE.  The Pledgee shall have and be entitled to
exercise all such powers hereunder as are specifically delegated to the Pledgee
by the terms hereof, together with such powers as are incidental thereto.  The
Pledgee may execute any of its duties hereunder by or through agents or
employees.  Neither the Pledgee, nor any director, officer, agent or employee of
the Pledgee, shall be liable for any action taken or omitted to be taken by it
or them hereunder or in connection herewith, except for its or their own gross
negligence or willful misconduct.  The Pledgor hereby agrees to indemnify and
hold harmless the Pledgee and/or any such director, officer, agent or employee
from and against any and all liability incurred by any of them, hereunder or in
connection herewith, unless such liability shall be due to its or their own
gross negligence or willful misconduct.

     16.  TERMINATION.  This Agreement shall terminate after the time when all
the Obligations have been fully paid and performed, at which time the Pledgee
shall reassign and redeliver (or cause to be reassigned and redelivered) to the
Pledgor, or to such person or persons as the Pledgor shall designate, against
receipt, such of the Pledged Collateral (if any) as shall not have been sold or
otherwise applied by the Pledgee pursuant to the terms hereof and shall still be
held by it hereunder, together with appropriate instruments of reassignment and
release.  Any such reassignment shall be without recourse upon or warranty by
the Pledgee and at the expense of the Pledgor.

     17.  EXPENSES.  The Pledgor agrees to reimburse the Pledgee promptly after
demand for any and all reasonable expenses, including the reasonable fees and
expenses of its counsel and of any experts and agents, which the Pledgee may
incur in connection with (i) the administration of this Agreement, (ii) the
custody or preservation of, or the registration of the Pledged Collateral, (iii)
the exercise or enforcement of any of the rights of the Pledgee hereunder, or
(iv) the failure by the Pledgor to perform or observe any of the provisions
hereof.

     18.  SECURITY INTEREST ABSOLUTE.  All rights of the Pledgee and security
interests hereunder, and all obligations of the Pledgor hereunder, shall be
absolute and unconditional irrespective of:

               (i)   any lack of validity or enforceability of the Loan
          Agreement or any other agreement or instrument relating thereto;

               (ii)  any change in the time, manner or place of payment of, or
          in any other term of, all or any of the Obligations, or any other
          amendment or waiver of or any consent to any departure from the Loan
          Agreement;

               (iii) any exchange, surrender, release or non-perfection of any
          other collateral, or any release or amendment or waiver of or consent
          to departure from any guaranty, for all or any of the Obligations; or

                                       10

<PAGE>

               (iv)  any other circumstance which might otherwise constitute a
          defense available to, or a discharge of, the Pledgor in respect of the
          Obligations or of this Agreement.

     19.  AMENDMENTS, WAIVERS AND CONSENTS.  No amendment or waiver of any
provision of this Agreement nor consent to any departure by the Pledgor
herefrom, shall in any event be effective unless the same shall be in writing
and signed by the Pledgee, and then such amendment, waiver or consent shall be
effective only in the specific instance and for the specific purpose for which
given.

     20.  NOTICES.  Any notice required or desired to be served, given or
delivered hereunder shall be in writing (including facsimile transmission), and
shall be deemed to have been validly served, given or delivered upon the earlier
of (a) personal delivery to the address set forth below (b) in the case of
mailed notice, two (2) days after deposit in the United States mails, with
proper postage for certified mail, return receipt requested, prepaid, or in the
case of notice by Federal Express or other reputable overnight courier service,
one (1) day after delivery to such courier service, and (c) in the case of
facsimile transmission, upon transmission with confirmation of receipt,
addressed to the party to be notified as follows:

     If to the Pledgor:  Prime Group VI, L.P.
                         c/o The Prime Group, Inc.
                         77 West Wacker Drive
                         Suite 3900 (Suite 4200 after February 1, 1999)
                         Attn: Michael W. Reschke 
                         Facsimile Number: (312)917-1511

     With a copies to:   Winston & Strawn
                         35 West Wacker Drive
                         Chicago, Illinois 60601
                         Attn: Wayne D. Boberg, Esq.
                         Facsimile Number: (312)558-5700

     And to:             The Prime Group, Inc.
                         77 West Wacker Drive
                         Suite 4200
                         Attn: Robert J. Rudnik, Esq.
                         Facsimile Number: (312)917-8442

     If to the Pledgee:  LaSalle National Bank 
                         135 South LaSalle Street 
                         Chicago, Illinois  60603 
                         Attention: John C. Hein
                         Facsimile Number:  (312) 904-6691

                                       11

<PAGE>

     With a copy to:     Schwartz, Cooper, Greenberger & Krauss, Chartered
                         180 North LaSalle Street, Suite 2700
                         Chicago, Illinois 60601
                         Attention: Robert A. Smoller, Esq.
                         Facsimile Number: (312) 782-8416

or to such other address as any of the parties may hereafter designate for
itself by written notice to the other parties in the manner herein prescribed.

     21.  CONTINUING SECURITY INTEREST.  This Agreement shall create a
continuing security interest in the Pledged Collateral and shall (i) be binding
upon the Pledgor, its successors and assigns, and (ii) inure to the benefit of
the Pledgee and its successors, transferees and assigns.

     22.  WAIVERS.  To the extent permitted by applicable law, the Pledgor
waives presentment and demand for payment of any of the Obligations, protest and
notice of dishonor or default with respect to any of the Obligations, and all
other notices to which the Pledgor might otherwise be entitled, except as
otherwise expressly provided herein or in the Loan Agreement.

     23.  WAIVER OF JURY TRIAL.  The Pledgor and the Pledgee each hereby waive
any right to a trial by jury in any action or proceeding to enforce or defend
any rights under this Agreement or any amendment, instrument, document or
agreement delivered or which may in the future be delivered in connection
herewith or arising from any banking relationship existing in connection with
this Agreement, and agrees that any such action or proceeding shall be tried
before a court and not before a jury.

     24.  GOVERNING LAW; TERMS.  This Agreement shall be governed by and
construed in accordance with the internal laws (as opposed to conflict of laws
provisions) and decisions of the State of Illinois.  Unless otherwise defined
herein, terms defined in Articles 3, 8 and 9 of the Code are used herein as
therein defined.  Whenever possible, each provision of this Agreement shall be
interpreted in such manner as to be effective and valid under applicable law,
but, if any provision of this Agreement shall be interpreted in such manner as
to be ineffective or invalid under applicable law, such provisions shall be
ineffective or invalid only to the extent of such prohibition or invalidity,
without invalidating the remainder of such provision or the remaining provisions
of this Agreement.

     25.  DEFINITIONS.  The singular shall include the plural and vice versa and
any gender shall include any other gender as the text shall indicate.

     26.  SECTION HEADINGS.  The section headings herein are for convenience of
reference only, and shall not affect in any way the interpretation of any of the
provisions hereof.

     27.  NON-RECOURSE.  The non-recourse provisions set forth in Section 11.5
of the Loan Agreement are incorporated in this Agreement by reference as if
fully set forth herein.

                                       12

<PAGE>

          [BALANCE OF PAGE INTENTIONALLY LEFT BLANK; SIGNATURE PAGE FOLLOWS.]

                                       13

<PAGE>

     IN WITNESS WHEREOF, the Pledgor and the Pledgee have each caused this
Pledge Agreement to be duly executed and delivered by its officer, if any,
thereunto duly authorized as of the date first above written.

                              PRIME GROUP VI, L.P., an Illinois limited
                              partnership

                              By:  PGLP, Inc., an Illinois corporation, as
                                   managing general partner


                                   By:  /s/ ROBERT J. RUDNIK
                                      ----------------------------------------
                                        Its: VICE PRESIDENT
                                            ----------------------------------

                              LASALLE NATIONAL BANK, a national banking
                              association


                              By:  /s/ JOHN C. HEIN
                                 ---------------------------------------------
                                   Its: FIRST VICE PRESIDENT
                                       ---------------------------------------

<PAGE>

                                      SCHEDULE I

                          DESCRIPTION OF PLEDGED COLLATERAL



A.   PLEDGED SHARES

<TABLE>
<CAPTION>

     Issuer                                  Certificate No.           Shares
     ------                                  --------------            ------
    <S>                                     <C>                      <C>
     Brookdale Living Communities, Inc.                               3,576,933


     Apartment Investment
       and Management Company                                           115,000
</TABLE>


B.   PLEDGED UNITS

     104,632 units of limited partnership interests in Prime Retail, L.P., a
     Delaware limited partnership, as evidenced by certificate number
     ____________

     47,525 units of limited partnership interests in Prime Group Realty, L.P.,
     a Delaware limited partnership, as evidenced by certificate number
     ___________

<PAGE>

                                     SCHEDULE II

                                  OTHER AGREEMENTS



     1.   Registration Rights Agreement dated as of November 17, 1997 by
          and among Prime Group Realty Trust, Prime Group Realty, L.P.,
          Prime Group Limited Partnership, Primestone Investment Partners
          L.P. and the other investors named therein.

     2.   Registration Rights Agreement dated as of June 15, 1998 by and
          among Prime Retail, Inc., Prime Retail, L.P. and the other
          investors named therein.

     3.   Prime Retail Partnership Agreement.

     4.   Prime Group Realty Partnership Agreement.

     5.   Lock-Up Agreement, dated November 11, 1997, from Prime Group Limited
          Partnership to Prudential Securities Incorporated, Friedman, Billings,
          Ramsey & Co., Inc., Smith Barney Inc. and Morgan Keegan & Company,
          Inc.



<PAGE>

                          CONTINUING UNCONDITIONAL GUARANTY


          WHEREAS, PRIME GROUP VI, L.P., an Illinois limited partnership 
("BORROWER") has entered into a Loan Agreement dated as of December 18, 1998, 
(the "LOAN AGREEMENT") with LASALLE NATIONAL BANK, a national banking 
association ("LENDER"), pursuant to which Lender has made or may, in its sole 
discretion, from time to time hereafter, make loans and advances to or extend 
other financial accommodations to Borrower;

          WHEREAS, The Prime Group, Inc., an Illinois corporation  
("GUARANTOR") is a limited partner of Borrower and is desirous of having 
Lender extend and/or continue the extension of credit to Borrower, and Lender 
has required that Guarantor execute and deliver this Guaranty to Lender as a 
condition to the extension and continuation of credit by Lender; and

          WHEREAS, the extension and/or continued extension of credit, as 
aforesaid, by Lender is necessary and desirable to the conduct and operation 
of the business of Borrower and will inure to the personal and financial 
benefit of Guarantor;

     1.   NOW, THEREFORE, for value received and in consideration of the 
Loans made or to be made by Lender to Borrower pursuant to the Loan 
Agreement, the Guarantor hereby unconditionally guaranties (i) the full and 
prompt payment when due, whether at maturity or earlier, by reason of 
acceleration or otherwise, and at all times thereafter, of all of the 
indebtedness, liabilities and obligations of every kind and nature of 
Borrower to Lender or any parent, affiliate or subsidiary of Lender (the term 
"LENDER" as used hereinafter shall include such parents, affiliates and 
subsidiaries under the Loan Agreement), howsoever created, arising or 
evidenced, whether direct or indirect, absolute or contingent, joint or 
several, now or hereafter existing, or due or to become due, and howsoever 
owned, held or acquired by Lender, whether through discount, overdraft, 
purchase, direct loan or as collateral or otherwise, under the Loan Agreement 
and (ii) the prompt, full and faithful discharge by Borrower of each and 
every term, condition, agreement, representation and warranty now or 
hereafter made by Borrower to Lender under the Loan Agreement (all such 
indebtedness, liabilities and obligations being hereinafter referred to as 
the "BORROWER'S OBLIGATIONS").  Guarantor further agrees to pay all costs and 
expenses, including, without limitation, all court costs and reasonable 
attorneys' and paralegals' fees paid or incurred by Lender in endeavoring to 
collect all or any part of Borrower's Obligations from, or in prosecuting any 
action against, Guarantor or any other guarantor of all or any part of 
Borrower's Obligations.  All amounts payable by Guarantor under this Guaranty 
shall be payable upon demand by Lender.

     2.   Notwithstanding any provision of this Guaranty to the contrary, it 
is intended that this Guaranty, and any liens and security interests granted 
by Guarantor to secure this Guaranty, not constitute a "Fraudulent 
Conveyance" (as defined below).  Consequently, Guarantor agrees that if the 
Guaranty, or any liens or security interests securing this Guaranty, would, 
but for the application of this sentence, constitute a Fraudulent Conveyance, 
this Guaranty and each such lien and security interest shall be valid and 
enforceable only to the maximum extent that would not cause this Guaranty or 
such lien or security interest to constitute a Fraudulent Conveyance, and 
this Guaranty 

<PAGE>

shall automatically be deemed to have been amended accordingly at all 
relevant times. For purposes hereof, "FRAUDULENT CONVEYANCE" means a 
fraudulent conveyance under Section 548 of the "Bankruptcy Code" (as 
hereinafter defined) or a fraudulent conveyance or fraudulent transfer under 
the provisions of any applicable fraudulent conveyance or fraudulent transfer 
law or similar law of any state, nation or other governmental unit, as in 
effect from time to time.

     3.   Guarantor hereby agrees that, except as hereinafter provided, its 
obligations under this Guaranty shall be unconditional, irrespective of (i) 
the validity or enforceability of Borrower's Obligations or any part thereof, 
or of any promissory note or other document evidencing all or any part of 
Borrower's Obligations, (ii) the absence of any attempt to collect Borrower's 
Obligations from Borrower or any other guarantor or other action to enforce 
the same, (iii) the waiver or consent by Lender with respect to any provision 
of any instrument evidencing Borrower's Obligations, or any part thereof, or 
any other agreement heretofore, now or hereafter executed by Borrower and 
delivered to Lender, (iv) failure by Lender to take any steps to perfect and 
maintain its security interest in, or to preserve its rights to, any security 
or collateral for Borrower's Obligations, (v) the institution of any 
proceeding under Chapter 11 of Title 11 of the United States Code (11 U.S.C. 
Section 101 et seq.), as amended (the "BANKRUPTCY CODE"), or any similar 
proceeding, by or against Borrower, or Lender's election in any such 
proceeding of the application of Section 1111(b)(2) of the Bankruptcy Code, 
(vi) any borrowing or grant of a security interest by Borrower as 
debtor-in-possession, under Section 364 of the Bankruptcy Code, (vii) the 
disallowance, under Section 502 of the Bankruptcy Code, of all or any portion 
of Lender's claim(s) for repayment of Borrower's Obligations, or (viii) any 
other circumstance which might otherwise constitute a legal or equitable 
discharge or defense of a guarantor other than if the Borrower's Obligations 
have been paid in full and discharged and the Loan Agreement is terminated.

     4.   If bankruptcy or reorganization proceedings at any time are 
instituted by or against the Borrower under the Bankruptcy Code, and if in 
the one year period ending on the date such proceedings are instituted, the 
Borrower has granted a security interest or made a non-cash transfer in favor 
of the Lender at a time when the aggregate value of the collateral securing 
the Loan (as defined in the Loan Agreement) was less than the aggregate 
amount of all the guaranteed indebtedness, and Guarantor: (a) is an "insider" 
as defined in Section 101(28) of said Code, now existing or hereafter 
amended; and (b) is an "insider-guarantor" under Section 547(b) of the Code, 
now existing or hereafter amended, then in any such event, the Guarantor as 
such "insider-guarantor" agrees not to seek recourse (by subrogation or 
otherwise) against or in any manner become a creditor of the Borrower if 
called upon to make payment to the Lender hereunder.

     5.   Guarantor hereby waives, to the extent permitted by applicable law 
and except as otherwise provided herein or in the Loan Agreement, diligence, 
presentment, demand of payment, filing of claims with a court in the event of 
receivership or bankruptcy of Borrower, protest or notice with respect to 
Borrower's Obligations and all demands whatsoever, and covenants that this 
Guaranty will not be discharged, except by complete performance of the 
obligations and liabilities contained herein.  Upon any Event of Default by 
Borrower as provided in any instrument or document evidencing all or any part 
of Borrower's Obligations, including without limitation the Loan Agreement, 
Lender may, at its sole election, proceed directly and at once, without 
notice, against Guarantor to collect and recover the full amount or any 
portion of Borrower's Obligations, 

                                     2
<PAGE>

without first proceeding against Borrower, or any other person, firm, or 
corporation, or against any security or collateral for Borrower's Obligations.

     6.   Lender is hereby authorized, without notice or demand and without 
affecting the liability of Guarantor hereunder, to at any time and from time 
to time (i) renew, extend, accelerate or otherwise change the time for 
payment of, or other terms relating to, Borrower's Obligations or otherwise 
modify, amend or change the terms of any promissory note or other agreement, 
document or instrument now or hereafter executed by Borrower and delivered to 
Lender; (ii) accept partial payments on Borrower's Obligations; (iii) take 
and hold security or collateral for the payment of Borrower's Obligations 
guaranteed hereby, or for the payment of this Guaranty, or for the payment of 
any other guaranties of Borrower's Obligations or other liabilities of 
Borrower, and exchange, enforce, waive and release any such security or 
collateral; (iv) apply such security or collateral and direct the order or 
manner of sale thereof as in its sole discretion it may determine; and (v) 
settle, release, compromise, collect or otherwise liquidate Borrower's 
Obligations and any security or collateral therefor in any manner, without 
affecting or impairing the obligations of Guarantor hereunder.  Lender shall 
have the exclusive right to determine the time and manner of application of 
any payments or credits, whether received from Borrower or any other source, 
and such determination shall be binding on Guarantor.  All such payments and 
credits may be applied, reversed and reapplied, in whole or in part, to any 
of Borrower's Obligations as Lender shall determine in its sole discretion 
without affecting the validity or enforceability of this Guaranty.

     7.   The Guarantor will at all times maintain on a consolidated and 
combined basis the ratio of Operating Income to Debt Service at the end of 
each month of not less than 2.0 to 1.0.  For purposes of this paragraph:

     "NET INCOME" means, with reference to any quarter, the net income (or 
net deficit) of Guarantor on a consolidated and combined basis for such 
quarter on a modified cash basis (i.e., cash receipts less cash disbursements 
and accrued expenses), and without limiting the foregoing, after deduction 
from gross income of all expenses and reserves, including reserves for all 
taxes on or measured by income, but excluding any extraordinary profits and 
also excluding any taxes on such profits.

     "OPERATING INCOME" means, with reference to any quarter, Net Income for 
such period plus all amounts deducted in arriving at such Net Income amount 
in respect of (i) Debt Service for such quarter, (ii) federal, state and 
local income taxes for such quarter, and (iii) non-cash items such as 
depreciation and amortization of intangibles.

     "DEBT SERVICE" means, with reference to any quarter, the sum of all 
interest paid, accrued or capitalized and any required principal amortization 
of the Guarantor on a combined and consolidated basis for such quarter 
determined in accordance with GAAP.

On or before the 20th day after the end of each calendar quarter, Guarantor 
shall provide Lender with a compliance certificate in a form reasonably 
satisfactory to Lender stating whether Guarantor is in compliance with the 
covenant set forth in this paragraph.

                                       3
<PAGE>

     8.   To secure the payment and performance of Guarantor's obligations 
and liabilities contained herein, Guarantor grants to Lender a security 
interest in all property of Guarantor delivered concurrently herewith, if 
any, or which is now, or at any time hereafter in transit to, or in the 
possession, custody or control of Lender, and all proceeds of all such 
property.  Guarantor agrees that Lender shall have the rights and remedies of 
a secured party under the Uniform Commercial Code of Illinois, as now 
existing or hereafter amended, with respect to all of the aforesaid property, 
including without limitation thereof, the right to sell or otherwise dispose 
of any or all of such property and apply the proceeds of such sale to the 
payment of Borrower's Obligations.  In addition, at any time after maturity 
of Borrower's Obligations by reason of acceleration or otherwise, Lender may, 
in its sole discretion, without notice to Guarantor and regardless of the 
acceptance of any security or collateral for the payment hereof, appropriate 
and apply toward the payment of Borrower's Obligations (i) any indebtedness 
due or to become due from Lender to Guarantor, and (ii) any moneys, credits 
or other property belonging to Guarantor, at any time held by or coming into 
the possession of Lender whether for deposit or otherwise.

     9.   Guarantor hereby assumes responsibility for keeping itself informed 
of the financial condition of Borrower, and any and all endorsers and/or 
other guarantors of any instrument or document evidencing all or any part of 
Borrower's Obligations and of all other circumstances bearing upon the risk 
of nonpayment of Borrower's Obligations or any part thereof that diligent 
inquiry would reveal and Guarantor hereby agrees that Lender shall have no 
duty to advise Guarantor of information known to Lender regarding such 
condition or any such circumstances or to undertake any investigation not a 
part of its regular business routine.  If Lender, in its sole discretion, 
undertakes at any time or from time to time to provide any such information 
to any Guarantor, Lender shall be under no obligation to update any such 
information or to provide any such information to Guarantor on any subsequent 
occasion.

     10.  The Guarantor hereby represents and warrants unto the Lender that: 
(i) the Guarantor is a corporation validly organized and existing and in good 
standing under the laws of the State of Illinois, is duly qualified to do 
business and is in good standing as a foreign corporation in each 
jurisdiction where the nature of its business requires such qualification 
(unless the failure to so qualify would not be reasonably likely to 
materially and adversely affect the Guarantor), and has full power and 
authority to own its property and to conduct its business presently conducted 
by it; (ii) the execution, delivery and performance by the Guarantor of this 
Guaranty, are within the Guarantor's corporate powers, have been duly 
authorized by all necessary corporate action, and do not contravene the 
Guarantor's articles of incorporation or by-laws or any contractual 
restriction, law or governmental regulation or court decree or order binding 
on or affecting the Guarantor (the effect of which contravention would be 
reasonably likely to have a material adverse effect upon the Guarantor) or 
result in, or require the creation or imposition of, any Lien on any of the 
Guarantor's properties; (iii) this Guaranty constitutes a legal, valid and 
binding obligation of the Guarantor enforceable in accordance with its terms, 
except as enforceability may be limited by bankruptcy, insolvency or similar 
laws affecting the enforcement of creditors' rights generally; (iv) the 
consolidated balance sheets of the Guarantor and its subsidiaries as at 
December 31, 1997 and the related statements of earnings of the Guarantor and 
its subsidiaries, copies of which have been furnished to the Lender, have 
been prepared in accordance with generally accepted accounting principles 
consistently applied, and present fairly the consolidated financial condition 
of the 

                                       4

<PAGE>

Guarantor covered thereby as at the dates thereof and the results of their 
operations for the periods then ended, and since December 31, 1997, there has 
been no material adverse change in the financial condition, operations, 
assets, business or properties of the Guarantor.

     11.  Guarantor consents and agrees that Lender shall be under no 
obligation to marshall any assets in favor of Guarantor or against or in 
payment of any or all of Borrower's Obligations. Guarantor further agrees 
that, to the extent that Borrower makes a payment or payments to Lender, or 
Lender receives any proceeds of collateral, which payment or payments or any 
part thereof are subsequently invalidated, declared to be fraudulent or 
preferential, set aside and/or required to be repaid to Borrower, its estate, 
trustee, receiver or any other party, including, without limitation, 
Guarantor, under any bankruptcy law, state or federal law, common law or 
equitable theory, then to the extent of such payment or repayment, Borrower's 
Obligations or the part thereof which has been paid, reduced or satisfied by 
such amount, and Guarantor's obligations hereunder with respect to such 
portion of Borrower's Obligations, shall be reinstated and continued in full 
force and effect as of the date such initial payment, reduction or 
satisfaction occurred.

     12.  Guarantor agrees that any and all claims of Guarantor against 
Borrower, any endorser or any other guarantor of all or any part of 
Borrower's Obligations, or against any of Borrower's properties, whether 
arising by reason of any payment by Guarantor to Lender pursuant to the 
provisions hereof, or otherwise, shall be subordinate and subject in right of 
payment to the prior payment, in full, of all of Borrower's Obligations; 
provided, however, that this provision shall not apply to distributions made 
or to be made by Borrower under Borrower's partnership agreement to Guarantor 
prior to any Event of Default (as defined in the Loan Agreement) by Borrower 
as provided in any instrument or document evidencing all or any part of 
Borrower's Obligations, including, without limitation, the Loan Agreement.

     13.  Subject to the terms of the Loan Agreement, Lender may, without 
notice to anyone, sell or assign Borrower's Obligations or any part thereof, 
or grant participations therein, and in any such event each and every 
immediate or remote assignee or holder of, or participant in, all or any of 
Borrower's Obligations shall have the right to enforce this Guaranty, by suit 
or otherwise for the benefit of such assignee, holder, or participant, as 
fully as if herein by name specifically given such right, but Lender shall 
have an unimpaired right, prior and superior to that of any such assignee, 
holder or participant, to enforce this Guaranty for the benefit of Lender, as 
to any part of Borrower's Obligations retained by Lender.

     14.  This Guaranty shall be binding upon Guarantor and upon the 
successors (including without limitation, any receiver, trustee or debtor in 
possession of or for Guarantor) of Guarantor and shall inure to the benefit 
of Lender and its successors and assigns.  If there is more than one 
signatory hereto, all references to Guarantor herein shall include each and 
every Guarantor and each and every obligation of Guarantor hereunder shall be 
the joint and several obligation of each Guarantor.  Each Guarantor that is a 
corporation or a partnership hereby represents and warrants that it has all 
necessary corporate or partnership authority, as the case may be, to execute 
and deliver this Guaranty and to perform its obligations hereunder.

                                      5

<PAGE>


     15.  This Guaranty shall continue in full force and effect, and Lender 
shall be entitled to make loans and advances and extend financial 
accommodations to Borrower under the Loan Agreement on the faith hereof until 
such time as Lender has, in writing, notified Guarantor that all of 
Borrower's Obligations have been paid in full and discharged and the Loan 
Agreement has been terminated or until Lender has actually received written 
notice from any Guarantor of the discontinuance of this Guaranty as to that 
Guarantor, or written notice of the death, incompetency or dissolution of any 
Guarantor.  In case of any discontinuance by, or death, incompetency or 
dissolution of, any Guarantor (collectively, a "TERMINATION EVENT"), this 
Guaranty and the obligations of such Guarantor and his or its heirs, legal 
representatives, successors or assigns, as the case may be, shall remain in 
full force and effect with respect to all of Borrower's Obligations incurred 
prior to the receipt by Lender of written notice of the Termination Event.  
The occurrence of a Termination Event with respect to one Guarantor shall not 
affect or impair the obligations of any other Guarantor hereunder.

     16.  Anything in this Guaranty to the contrary notwithstanding, it is 
expressly agreed that neither the Lender, nor its successors or assigns, 
shall have any recourse of any kind whatsoever for or with regard to any 
indebtedness, liability or obligation under this Guaranty whether or not so 
provided herein, against any of the following persons personally or against 
any of the separate property or estate of any of the following persons (as 
distinguished from the property of the Guarantor) and the Lender, and each of 
its successors and assigns waives and does hereby waive any such personal 
liability:  any present or future director or shareholder or employee of the 
Guarantor, any present or future partner in any partnership which is or 
becomes a shareholder of the Guarantor, any person or entity that, directly 
or indirectly, through one or more partnerships, is a partner in any 
partnership which is or becomes a shareholder of the Guarantor,  or any 
shareholder, officer, director, employee, trustee, beneficiary, member or 
agent of any corporation or other entity which is or becomes a shareholder of 
the Guarantor.  The foregoing shall not impair the ability of the Lender to 
enforce the terms of this Guaranty against the Guarantor.

     17.  Wherever possible each provision of this Guaranty shall be 
interpreted in such manner as to be effective and valid under applicable law, 
but if any provision of this Guaranty shall be prohibited by or invalid under 
such law, such provision shall be ineffective to the extent of such 
prohibition or i-nvalidity without invalidating the remainder of such 
provision or the remaining provisions of this Guaranty.

     18.  All notices to be sent under this Guaranty shall be sent by any 
method of delivery described in the Loan Agreement, and to the Lender at the 
addresses described in the Loan Agreement, and to Guarantor at the following 
addresses:

     To Guarantor:       The Prime Group, Inc.
                         77 West Wacker Drive
                         Suite 3900 (Suite 4200 from and after February 1, 1999)
                         Chicago, Illinois 60601
                         Attn: Michael W. Reschke 
                         Facsimile: (312)917-1511

                                       6

<PAGE>

     With a copies to:   Winston & Strawn
                         35 West Wacker Drive
                         Chicago, Illinois 60601
                         Attn: Wayne D. Boberg, Esq.
                         Facsimile: (312)558-5700

                         The Prime Group, Inc.
                         77 West Wacker Drive
                         Suite 4200
                         Chicago, Illinois 60601
                         Attn: Robert J. Rudnik, Esq.
                         Facsimile: (312)917-8442

or to such other addresses as Guarantor or Lender shall designate in a written
notice to the other.

     19.  THIS GUARANTY SHALL BE GOVERNED AND CONTROLLED BY THE INTERNAL LAWS 
OF THE STATE OF ILLINOIS.

     20.  Guarantor irrevocably agrees that, subject to Lender's sole and 
absolute election, ALL ACTIONS OR PROCEEDINGS IN ANY WAY, MANNER OR RESPECT, 
ARISING OUT OF OR FROM OR RELATED TO THIS GUARANTY SHALL BE LITIGATED IN 
COURTS HAVING SITUS WITHIN THE CITY OF CHICAGO, STATE OF ILLINOIS.  GUARANTOR 
HEREBY CONSENTS AND SUBMITS TO THE JURISDICTION OF ANY LOCAL, STATE OR 
FEDERAL COURTS LOCATED WITHIN SAID CITY AND STATE. GUARANTOR HEREBY WAIVES 
ANY RIGHT IT MAY HAVE TO TRANSFER OR CHANGE THE VENUE OF ANY LITIGATION 
BROUGHT AGAINST GUARANTOR BY LENDER IN ACCORDANCE WITH THIS PARAGRAPH.  
SERVICE OF LEGAL PROCESS MAY BE MADE ON THE GUARANTOR BY ANY METHOD OF 
DELIVERY, AND TO THE ADDRESSES, FOR SENDING NOTICES HEREUNDER, AS DESCRIBED 
IN PARAGRAPH 17 ABOVE.

     21.  GUARANTOR AND LENDER HEREBY WAIVE ALL RIGHTS TO TRIAL BY JURY IN 
ANY ACTION OR PROCEEDING WHICH PERTAINS DIRECTLY OR INDIRECTLY TO THIS 
GUARANTY.

        [BALANCE OF PAGE INTENTIONALLY LEFT BLANK; SIGNATURE PAGE FOLLOWS.]

                                       7

<PAGE>

          IN WITNESS WHEREOF, this Guaranty has been duly executed by the
undersigned as of the above-mentioned date.



                                   THE PRIME GROUP, INC., an Illinois
                                   corporation


                                   By:   /s/ ROBERT J. RUDNIK
                                       --------------------------------------
                                        Its: EXECUTIVE VICE PRESIDENT
                                             --------------------------------




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