AMENDED AND RESTATED
                                    AGREEMENT

     THIS AGREEMENT is entered into as of the 8th day of December, 2000 by and
between Barbara Yamarick ("Executive") and Brandywine Realty Trust (the
"Company") and amends and restates in its entirety the Agreement dated as of May
12, 1999 (the "Prior Agreement") between Executive and the Company.

     WHEREAS, Executive is currently employed by the Company and/or a Subsidiary
(as defined below) of the Company;

     WHEREAS, in order to encourage Executive to remain an employee of the
Company and/or a Subsidiary, the Company is entering into this Agreement with
Executive.

     NOW, THEREFORE, the parties hereto, intending to be legally bound, hereby
agree as follows:

     1. Payment Obligation. The Company agrees that if (i) a Change of Control
(as defined below) of the Company occurs at a time when Executive is then an
employee of the Company and/or a Subsidiary of the Company and (ii) within one
year of the occurrence of the Change of Control either (a) the Company or the
purchaser or successor thereto (the "Purchaser") terminates the employment of
Executive other than for Cause (as defined below) or (b) Executive resigns for
Good Reason (as defined below), then the Company or Purchaser will be obligated
to (i) continue to pay to Executive an amount equal to her base salary as in
effect at the time of the Change of Control for a period expiring 547 days after
the effective date of Executive's termination of employment and (ii) during the
period referenced in the preceding clause (i), pay to Executive, in equal
monthly installments, an amount equal to her bonus, if any, for the year
preceding the termination or resignation.

     2. No Right to Employment. This Agreement shall not confer upon Executive
any right to remain an employee of the Company or a Subsidiary of the Company,
and shall only entitle Executive to the salary continuation payments in the
limited circumstances set forth in Paragraph 1 above.

     3. Certain Definitions. As used herein: (i) the terms "Change of Control"
and "Subsidiary" shall have the respective meanings assigned to them in the
Company's 1997 Long-Term Incentive Plan, as amended (the "Plan"), (ii) the term
"Cause" shall have the meaning assigned to it in the Plan (except that
references in such Plan definition to "Company" shall be interpreted to mean the
Company or Purchaser, as applicable) and (iii) the term "Good Reason" shall mean
any of (a) a reduction in Executive's base salary as in effect at the time of
the Change of Control, (b) a significant adverse alteration in the nature or
status of Executive's responsibilities from those in effect at the time of the
Change of Control or (c) relocation of the place where Executive performs her
day-to-day responsibilities at the time of the Change of Control by more than 30
miles.



     4. Tax Witholding, etc. All compensation payable under this Agreement shall
be subject to customary withholding taxes and other employment taxes as required
with respect to compensation paid by an employer to an employee and the amount
of compensation payable hereunder shall be reduced appropriately to reflect the
amount of any required withholding. The Company shall have no obligation to make
any payments to the Executive or make the Executive whole for the amount of any
required taxes.

     5. Miscellaneous.

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

          2. Entire Agreement. This Agreement contains the entire understanding
     among the parties hereto with respect to the subject matter hereof and
     supersedes all prior agreements and understandings, inducements or
     conditions, express or implied, oral or written, except as herein
     contained. This Agreement may not be modified or amended other than by an
     agreement in writing.

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

          4. Prior Agreement. The Prior Agreement is hereby amended and restated
     in its entirety.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the day and year first above written.

                                       BRANDYWINE REALTY TRUST

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


                                           /s/ Barbara Yamerick
                                           -------------------------------------
                                           Barbara Yamarick