Document:

<PAGE>
                                                                     EXHIBIT 4.1

                               FIRST AMENDMENT TO
                           THIRD AMENDED AND RESTATED
                        AGREEMENT OF LIMITED PARTNERSHIP
                      OF EOP OPERATING LIMITED PARTNERSHIP

          THIS FIRST AMENDMENT TO THIRD AMENDED AND RESTATED AGREEMENT OF
LIMITED PARTNERSHIP OF EOP OPERATING LIMITED PARTNERSHIP (this "AMENDMENT") is
entered into on July 29, 2002, by EQUITY OFFICE PROPERTIES TRUST, a Maryland
real estate investment trust (the "COMPANY"), as the general partner (the
"GENERAL PARTNER") of EOP Operating Limited Partnership, a Delaware limited
partnership (the "PARTNERSHIP").

          WHEREAS, on July 29, 2002, the Company issued and sold 8,500,000
cumulative redeemable series G preferred shares (the "Series G Preferred
Shares") pursuant to an underwritten public offering made pursuant to the
Company's registration statement on Form S-3 dated July 22, 1998, its prospectus
dated July 22, 1998, and its related prospectus supplement dated July 1, 2002;
and

          WHEREAS, pursuant to Section 4.2.A. of the Partnership Agreement, the
General Partner has determined that, in connection with the issuance of the
Series G Preferred Shares, it is necessary and desirable to amend the
Partnership Agreement to create additional Partnership Units having
designations, preferences and other rights which are substantially the same as
the economic rights of the Series G Preferred Shares;

          NOW, THEREFORE, in consideration of the premises set forth above and
for other good and valuable consideration, the receipt and sufficiency of which
hereby are acknowledged, the General Partner hereby amends the Partnership
Agreement and agrees to issue additional Partnership Units as follows:

          1. AMENDMENT OF ARTICLE I. Article I of the Partnership Agreement
hereby is amended to insert the following definition:

          "Series G Preferred Units" means the series of Partnership Units
          representing units of Limited Partnership Interest designated as the
          7.75% Series G Cumulative Redeemable Preferred Units, with the
          designations, preferences and other rights set forth in Attachment G
          hereto.

          2. ESTABLISHMENT OF SERIES G PREFERRED UNITS. In accordance with
Section 4.2.A of the Partnership Agreement, the Series G Preferred Units are
hereby established and issued to the Company in consideration of the Company's
Capital Contribution to the Partnership (as calculated pursuant to Section
4.2.B. of the Partnership Agreement) in connection with the Company's issuance
and sale of the Series G Preferred Shares. Attachment G hereto, which sets forth
the terms and conditions of the Series G Preferred Units hereby established, is
hereby made part of the Partnership Agreement and shall be included in its
entirety as Attachment G to the Partnership Agreement.

<PAGE>

          3. DEFINED TERMS. All capitalized terms used in this Amendment and not
otherwise defined shall have the meanings assigned to them in the Partnership
Agreement.

          4. EFFECTIVE DATE. This Amendment is effective as of July 29, 2002.

          IN WITNESS WHEREOF, the undersigned has executed this Amendment as of
the date first set forth above.

                                        EQUITY OFFICE PROPERTIES TRUST, a
                                        Maryland real estate investment trust,
                                        the General Partner of EOP Operating
                                        Limited Partnership

                                        By:  /s/ Richard R. Kincaid
                                           ------------------------

                                           Richard D. Kincaid,
                                           Executive Vice President, Chief
                                           Operating Officer, and Chief
                                           Financial Officer

<PAGE>

                                  ATTACHMENT G

                           (SERIES G PREFERRED UNITS)

          In accordance with Section 4.2.A of the Agreement, set forth below are
the terms and conditions of the Series G Preferred Units established and issued
by the Partnership on July 29, 2002, in connection with issuance of 8,500,000
cumulative redeemable series G preferred shares (the "Series G Preferred
Shares") by the General Partner. Capitalized terms used herein and not otherwise
defined shall have the meanings given to them in the Agreement.

          A. Designation and Number. A series of Partnership Units, designated
as 7.75% Series G Cumulative Redeemable Preferred Units (the "Series G Preferred
Units") hereby is established. The number of Series G Preferred Units shall be
8,500,000.

          B. Rank. The Series G Preferred Units shall, with respect to
distribution rights and rights upon liquidation, dissolution or winding up of
the Partnership, rank (a) senior to the Class A Units, Class B Units and all
Partnership Interests ranking junior to the Series G Preferred Units; (b) on a
parity with the Series A Preferred Units, the Series B Preferred Units, the
Series C Preferred Units, the Series E Preferred Units, and the Series F
Preferred Units, and (c) junior to all Partnership Interests issued by the
Partnership the terms of which specifically provide that such Partnership
Interests rank senior to the Series G Preferred Units.

          C. Distributions.

          (i) Pursuant to Section 5.1 of the Agreement, holders of Series G
Preferred Units shall be entitled to receive, out of Available Cash, cumulative
preferential distributions of Available Cash at the rate of 7.75% of the $25.00
liquidation preference per annum (equivalent to a fixed annual amount of $1.9375
per unit). Such distributions shall accumulate on a daily basis and be
cumulative from July 29, 2002 and shall be payable quarterly in equal amounts in
arrears on the 15th day of March, June, September and December of each year, or,
if not a business day, the next succeeding business day, commencing September
16, 2002 (each a "Series G Preferred Unit Distribution Payment Date"). Any
distribution payable on the Series G Preferred Units for any partial
distribution period shall be computed on the basis of a 360-day year consisting
of twelve 30-day months.

          (ii) Notwithstanding anything to the contrary contained herein,
distributions on the Series G Preferred Units shall accumulate whether or not
there is sufficient Available Cash for such distributions, whether or not there
are funds legally available for the payment of such distributions and whether or
not such distributions are authorized. Accumulated but unpaid distributions on
the Series G Preferred Units will accumulate as of the Series G Preferred Unit
Distribution Payment Date on which they first become payable or on the date of
redemption, as the case may be.

<PAGE>

          (iii) When distributions are not paid in full (or a sum sufficient for
such full payment is not so set apart) upon the Series G Preferred Units and any
other Partnership Interests ranking on a parity as to distributions with the
Series G Preferred Units, all distributions authorized upon the Series G
Preferred Units and any other Partnership Interests ranking on a parity as to
distributions with the Series G Preferred Units shall be authorized pro rata so
that the amount of distributions authorized per Partnership Unit of Series G
Preferred Units and such other Partnership Interests shall in all cases bear to
each other the same ratio that accumulated distributions per Partnership Unit on
the Series G Preferred Units and such other Partnership Interests (which shall
not include any accumulation in respect of unpaid distributions for prior
distribution periods if such other Partnership Interests do not have a
cumulative distribution) bear to each other. No interest, or sum of money in
lieu of interest, shall be payable in respect of any distribution payment or
payments on Series G Preferred Units which may be in arrears.

          (iv) Except as provided in Section C.(iii) of this Attachment G,
unless full cumulative distributions on the Series G Preferred Units have been
or contemporaneously are authorized and paid or authorized and a sum sufficient
for the payment thereof is set apart for payment for all past distribution
periods and the then current distribution period, no distributions (other than
in Partnership Interests ranking junior to the Series G Preferred Units as to
distributions and upon liquidation) shall be authorized or paid or set aside for
payment nor shall any other distribution be authorized or made upon the Class A
Units, the Class B Units, or any other Partnership Interests ranking junior to
or on a parity with the Series G Preferred Units as to distributions or upon
liquidation, nor shall any Class A Units, Class B Units, or any other
Partnership Interests ranking junior to or on a parity with the Series G
Preferred Shares as to distributions or upon liquidation be redeemed, purchased
or otherwise acquired for any consideration (or any moneys be paid to or made
available for a sinking fund for the redemption of any such units or other
Partnership Interests) by the Partnership (except by conversion into or exchange
for Partnership Interests ranking junior to the Series G Preferred Units as to
distributions and upon liquidation).

          (v) Holders of the Series G Preferred Units shall not be entitled to
any distribution, whether payable in cash, property or Partnership Units in
excess of full cumulative distributions on the Series G Preferred Units as
described above. Any distribution payment made on the Series G Preferred Units
shall first be credited against the earliest accumulated but unpaid distribution
due with respect to such Series G Preferred Units which remains payable.

          D. Allocations.

          Allocations of the Partnership's items of income, gain, loss and
deduction shall be allocated among holders of Series G Preferred Units in
accordance with Article VI of the Agreement.

                                 Attachment G-2
<PAGE>

          E. Liquidation Preference.

          (i) Upon any voluntary or involuntary liquidation, dissolution or
winding up of the affairs of the Partnership, the holders of Series G Preferred
Units then outstanding are entitled to be paid out of the assets of the
Partnership available for distribution to the Partners pursuant to Section
13.2.A of the Agreement a liquidation preference of $25.00 per Series G
Preferred Unit, plus an amount equal to any accumulated and unpaid distributions
to but excluding the date of payment, before any distribution of assets is made
to holders of Class A Units, Class B Units or any other Partnership Interests
that rank junior to the Series G Preferred Units as to liquidation rights.

          (ii) In the event that, upon any such voluntary or involuntary
liquidation, dissolution or winding up, the available assets of the Partnership
are insufficient to pay the amount of the liquidating distributions on all
outstanding Series G Preferred Units and the corresponding amounts payable on
all other Partnership Interests ranking on a parity with the Series G Preferred
Units in the distribution of assets, then such assets shall be allocated among
the Series G Preferred Units, as a class, and each class or series of such other
such Partnership Interests, as a class, in proportion to the full liquidating
distributions to which they would otherwise be respectively entitled.

          (iii) After payment of the full amount of the liquidating
distributions to which they are entitled, the holders of Series G Preferred
Units will have no right or claim to any of the remaining assets of the
Partnership.

          (iv) The consolidation or merger of the Partnership with or into any
other partnership, corporation, trust or entity or of any other partnership,
corporation, trust or other entity with or into the Partnership or the sale,
lease or conveyance of all or substantially all of, the property or business of
the Partnership, shall not be deemed to constitute a liquidation, dissolution or
winding up of the Partnership for purposes of this Section E.

          F. Redemption.

          In connection with a redemption by the General Partner of any or all
of the Series G Preferred Shares, the Partnership shall provide cash to the
General Partner for such purpose which shall be equal to redemption price of the
Series G Preferred Shares to be redeemed and one Series G Preferred Unit shall
be canceled with respect to each Series G Preferred Share so redeemed. From and
after the date in which the Series G Preferred Shares are redeemed, the Series G
Preferred Units so canceled shall no longer be outstanding and all rights
hereunder, to distributions or otherwise, with respect to such Series G
Preferred Units shall cease.

                                 Attachment G-3<PAGE>
                                                                    EXHIBIT 10.1

         This ASSUMPTION AND AMENDMENT TO CHANGE IN CONTROL AGREEMENT is entered
into effective as of May 22, 2002, by and among EQUITY OFFICE PROPERTIES
MANAGEMENT CORP., a Delaware corporation ("EOPMC"); EQUITY OFFICE PROPERTIES
TRUST, a Maryland real estate investment trust (the "Trust"); EOP OPERATING
LIMITED PARTNERSHIP, a Delaware limited partnership ("EOP Partnership"); and
RICHARD D. KINCAID (the "Executive").

                                    RECITALS

         Reference is made to a certain Change in Control Agreement dated as of
September 1, 2001, by and among EOPMC, the Trust and Executive (the "Change In
Control Agreement").

         The parties wish to amend the Change in Control Agreement as
hereinafter described.

                             Statement of Agreement

         Therefore, for value received, the receipt and sufficiency of which are
hereby acknowledged, the parties hereto do hereby enter into this Assumption and
Amendment to Change in Control Agreement providing as follows:

1. EOP Partnership, being both the sole shareholder of EOPMC and the current
employer of Executive, does hereby expressly assume, from and after January 1,
2002, all obligations of Employer set forth in the Change in Control Agreement
as if it were named therein as the Employer for the period from and after such
date. In consideration for such assumption, EOPMC is hereby released from any
and all future liability under or pursuant to the Change in Control Agreement.

                                       48
<PAGE>
2. Section 2.5(e) of the Change in Control Agreement shall be modified to read
as follows:

         (e)      The appointment after May 22, 2002 of a new Chief Executive
                  Officer for the Trust.

   and the paragraph currently identified as Section 2.5(e) shall be re-numbered
   as Section 2.5(f)

3. Except as aforesaid, the original terms and conditions of the Change in
Control Agreement are hereby re-affirmed and agreed to continue in full force
and effect.

                                      EQUITY OFFICE PROPERTIES MANAGEMENT CORP

                                      By:  /s/ STANLEY M. STEVENS
                                         ----------------------------
                                      Its: Executive Vice President
                                           --------------------------

                                      EQUITY OFFICE PROPERTIES TRUST

                                      By: /s/ SAMUEL ZELL
                                         ----------------------------
                                          Samuel Zell
                                          President and Chief Executive Officer

                                      EOP OPERATING LIMITED PARTNERSHIP

                                      By: Equity Office Properties Trust,
                                      Its General Partner

                                      By: /s/ SAMUEL ZELL
                                         ----------------------------
                                          Samuel Zell
                                          President and Chief Executive Officer

                                      /s/ RICHARD D. KINCAID
                                      -------------------------------
                                      Richard D. Kincaid

                                       49

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00045-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00045-of-00352.parquet"}]]