UNDERWRITING AGREEMENT

SIMON PROPERTY GROUP, L.P.
(a Delaware limited partnership)

$600,000,000 5.00% Notes due 2012

$650,000,000 5.25% Notes due 2016

UNDERWRITING AGREEMENT

December 5, 2006

UBS SECURITIES LLC
GREENWICH CAPITAL MARKETS, INC.
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
WACHOVIA CAPITAL MARKETS, LLC

as Representatives of the several Underwriters

c/o UBS Securities LLC
677 Washington Blvd.
Stamford, CT 06901

Ladies and Gentlemen:

Simon Property Group, L.P., a Delaware limited partnership (the “Operating Partnership”), confirms its agreement with UBS Securities LLC (“UBS”), Greenwich Capital Markets, Inc. (“RBS Greenwich”), Merrill Lynch, Pierce, Fenner & Smith Incorporated (“Merrill Lynch”) and Wachovia Capital Markets, LLC (“Wachovia”) and each of the Underwriters named in Schedule 1 hereto (collectively, the “Underwriters,” which term shall also include any Underwriter substituted as hereinafter provided in Section 10 hereof), for whom the Underwriters are acting as Representatives (in such capacity, the “Representatives”), with respect to the issue and sale by the Operating Partnership and the purchase by the Underwriters, acting severally and not jointly, of the respective principal amounts set forth in said Schedule 1 of $600,000,000 aggregate principal amount of its 5.00% senior unsecured notes due 2012 (the “2012 Notes”) and $650,000,000 aggregate principal amount of its 5.25% senior unsecured notes due 2016 (the “2016 Notes” and, together with the 2012 Notes, the “Notes”).

The Notes shall be issued under an indenture, dated as of November 26, 1996 (the “Original Indenture”), between the Operating Partnership and The Bank of New York (successor to The Chase Manhattan Bank), as trustee (the “Trustee”).  The title, aggregate principal amount, rank, interest rate or formula and timing of payments thereof, stated maturity date, redemption and/or repayment provisions, sinking fund requirements and any other variable terms of the Notes shall be established by or pursuant to a seventeenth supplemental indenture to the Original Indenture (as so supplemented, and as the same may be amended or further supplemented from time to time, the “Indenture”) to be entered into between the Operating Partnership and the Trustee on or prior to the Closing Time (as defined in Section 2(b)).  Notes issued in book-entry form shall be issued to Cede & Co. as nominee of The Depository Trust Company (“DTC”) pursuant to a letter agreement, to be dated as of the Closing Time (the “DTC Agreement”), among the Operating Partnership, the Trustee and DTC.

The Operating Partnership understands that the Underwriters propose to make a public offering of the Notes on the terms and in the manner set forth herein and as soon as the Representatives deem advisable after this Agreement has been executed and delivered and the Indenture has been qualified under the Trust Indenture Act of 1939, as amended (the “1939 Act”).

The Operating Partnership and Simon Property Group, Inc. a Delaware corporation and the sole general partner of the Operating Partnership (the “Company”) have jointly prepared and filed with the Securities and Exchange Commission (the “Commission”) an automatic shelf registration statement on Form S-3 (No. 333-132513 and 333-132513-01), including the related preliminary prospectus or prospectuses, which registration statement became effective upon filing under Rule 462(e) of the rules and regulations of the Commission (the “1933 Act Regulations”) under the Securities Act of 1933, as amended (the “1933 Act”).  Such registration statement covers the registration of the Notes under the 1933 Act.

Promptly after execution and delivery of this Agreement, the Operating Partnership will prepare and file with the Commission a prospectus supplement in accordance with the provisions of Rule 430B (“Rule 430B”) of the 1933 Act Regulations and paragraph (b) of Rule 424 (“Rule 424(b)”) of the 1933 Act Regulations, and deliver such prospectus to the Underwriters, for use by the Underwriters in connection with their solicitation of purchases of, or offering of, the Notes.  Any information included in such prospectus supplement that was omitted from such registration statement at the time it became effective but that is deemed to be part of and included in such registration statement pursuant to Rule 430B is referred to as “Rule 430B Information.”  Each prospectus supplement used in connection with the offering of the Notes that omitted Rule 430B Information is herein called a “preliminary prospectus supplement.”  Such registration statement, at any given time, including the amendments thereto to such time, the exhibits and any schedules thereto at such time, the documents incorporated by reference therein pursuant to Item 12 of Form S-3 under the 1933 Act at such time and the documents otherwise deemed to be a part thereof or included therein by the 1933 Act Regulations, is herein called the “Registration Statement.”  The Registration Statement at the time it originally became effective is herein called the “Original Registration Statement.”  The final prospectus supplement in the form first furnished to the Underwriters for use in connection with the offering of the Notes, including the documents incorporated by reference therein pursuant to Item 12 of Form S-3 under the 1933 Act at the time of the execution of this Agreement and any prospectus supplement that forms a part thereof, is herein called the “Prospectus Supplement.”  For purposes of this Agreement, all references to the Registration Statement, any preliminary prospectus supplement, the Prospectus Supplement or any amendment or supplement to any of the foregoing shall be deemed to include the copy filed with the Commission pursuant to its Electronic Data Gathering, Analysis and Retrieval (“EDGAR”) system.  Capitalized terms used but not otherwise defined shall have the meanings given to those terms in the Prospectus Supplement.

All references in this Agreement to financial statements and schedules and other information which is “contained,” “included” or “stated” in the Registration Statement, any preliminary prospectus supplement or the Prospectus Supplement (or other references of like import) shall be deemed to mean and include all such financial statements and schedules and other information which is incorporated by reference in or otherwise deemed by the 1933 Act Regulations to be a part of or included in the Registration Statement, any preliminary prospectus supplement or the Prospectus Supplement, as the case may be; and all references in this Agreement to amendments or supplements to the Registration Statement, any preliminary prospectus or the Prospectus shall be deemed to mean and include the filing of any document under the Securities Exchange Act of 1934, as amended (the “1934 Act”) which is incorporated by reference in or otherwise deemed by the 1933 Act Regulations to be a part of or included in the Registration Statement, such preliminary prospectus supplement or the Prospectus Supplement, as the case may be.

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The term “subsidiary” means a corporation, partnership or other entity, a majority of the outstanding voting stock, partnership interests or other equity interests, as the case may be, of which is owned or controlled, directly or indirectly, by the Operating Partnership and/or the Company, or by one or more other subsidiaries of the Operating Partnership and/or the Company.

SECTION 1.           Representations and Warranties .

(a)           Representations and Warranties by the Operating Partnership.  The Operating Partnership represents and warrants to each Underwriter, as of the date hereof, as of the Applicable Time (as defined below) and as of the Closing Time (in each case, a “Representation Date”), and agrees with each Underwriter, as follows:

(1)           Status as a Well-Known Seasoned Issuer. (A) At the time of filing the Original Registration Statement, (B) at the time of the most recent amendment thereto for the purposes of complying with Section 10(a)(3) of the 1933 Act (whether such amendment was by post-effective amendment, incorporated report filed pursuant to Section 13 or 15(d) of the 1934 Act or form of prospectus), (C) at the time the Company or the Operating Partnership or any person acting on their behalf (within the meaning, for this clause only, of Rule 163(c) of the 1933 Act Regulations) made any offer relating to the Notes in reliance on the exemption of Rule 163 of the 1933 Act Regulations and (D) at the date hereof, each of the Company and the Operating Partnership was and is a “well-known seasoned issuer” as defined in Rule 405 of the 1933 Act Regulations (“Rule 405”), including not having been and not being an “ineligible issuer” as defined in Rule 405.   The Registration Statement is an “automatic shelf registration statement,” as defined in Rule 405, and the Notes, since their registration on the Registration Statement, have been and remain eligible for registration by the Operating Partnership on a Rule 405 “automatic shelf registration statement.”  Neither the Company nor the Operating Partnership has received from the Commission any notice pursuant to Rule 401(g)(2) of the 1933 Act Regulations objecting to the use of the automatic shelf registration statement form.

At the time of filing the Original Registration Statement, at the earliest time thereafter that the Company or the Operating Partnership or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) of the 1933 Act Regulations) of the Notes and at the date hereof, each of the Company and the Operating Partnership was not and is not an “ineligible issuer,” as defined in Rule 405.

(2)           The Registration Statement .  The Original Registration Statement became effective upon filing under Rule 462(e) of the 1933 Act Regulations (“Rule 462(e)”) on March 17, 2006, and any post-effective amendment thereto also became effective upon filing under Rule 462(e).  No stop order suspending the effectiveness of the Registration Statement has been issued under the 1933 Act and no proceedings for that purpose have been instituted or are pending or, to the knowledge of the Company or the Operating Partnership, are contemplated by the Commission, and any request on the part of the Commission for additional information has been complied with.

Any offer that is a written communication relating to the Notes made prior to the filing of the Original Registration Statement by the Company or the Operating Partnership or any person acting on their behalf (within the meaning, for this paragraph only, of Rule 163(c) of the 1933 Act Regulations) has been filed with the Commission in accordance with the exemption provided by Rule 163 of the 1933 Act Regulations (“Rule 163”) and otherwise complied with the requirements of Rule 163, including without limitation the legending requirement, to qualify such offer for the exemption from Section 5(c) of the 1933 Act provided by Rule 163.

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At the respective times the Original Registration Statement and each amendment thereto became effective, at each deemed effective date with respect to the Underwriters pursuant to Rule 430B(f)(2) of the 1933 Act Regulations and at the Closing Time, the Registration Statement complied and will comply in all material respects with the requirements of the 1933 Act and the 1933 Act Regulations and the 1939 Act and the rules and regulations of the Commission under the 1939 Act (the “1939 Act Regulations”), and did not and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided , that this representation, warranty and agreement shall not apply to statements in or omissions from the Registration Statement made in reliance upon and in conformity with information furnished to the Operating Partnership in writing by any Underwriter through UBS expressly for use in the Registration Statement.

(3)           The Prospectus Supplement .  The Prospectus Supplement and any amendments or supplements thereto, at the time the Prospectus Supplement or any such amendment or supplement was issued, do not, and at the Closing Time shall not, include an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided , that this representation, warranty and agreement shall not apply to statements in or omissions from the Prospectus Supplement or any amendments or supplements thereto made in reliance upon and in conformity with information furnished to the Operating Partnership in writing by any Underwriter through UBS expressly for use in such Prospectus Supplement or any amendments or supplements thereto.

Each preliminary prospectus supplement (including the prospectus or prospectuses filed as part of the Original Registration Statement or any amendment thereto, the Prospectus Supplement) or any amendment or supplement thereto complied when so filed in all material respects with the 1933 Act Regulations and each preliminary prospectus supplement and the Prospectus Supplement delivered to the Underwriters for use in connection with this offering was identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

(4)           Disclosure at Time of Sale.  As of the Applicable Time, neither (x) the Issuer General Use Free Writing Prospectus(es) (as defined below) issued at or prior to the Applicable Time or the Statutory Prospectus (as defined below), considered together (collectively, the “General Disclosure Package”), nor (y) any individual Issuer Limited Use Free Writing Prospectus, when considered together with the General Disclosure Package, included any untrue statement of a material fact or omitted to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading.  The preceding sentence does not apply to statements in or omissions from the General Disclosure Package or any Issuer Limited Use Free Writing Prospectus based upon or in conformity with written information furnished to the Operating Partnership by any Underwriter through UBS specifically for use therein.

As of the time of the filing of the Final Term Sheet (as defined in Section 3(e)), the General Disclosure Package, when considered together with the Final Term Sheet, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. The preceding sentence does not apply to statements in or omissions from the General Disclosure Package based upon or in conformity with written information furnished to the Operating Partnership by any Underwriter through the Representatives specifically for use therein.

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Each Issuer Free Writing Prospectus, as of its issue date and at all subsequent times through the completion of the public offer and sale of the Notes or until any earlier date that the Operating Partnership notified or notifies UBS as described in Section 3(d), did not, does not and will not include any information that conflicted, conflicts or will conflict with the information contained in the Registration Statement or the Prospectus Supplement, including any document incorporated by reference therein and any preliminary or other prospectus supplement deemed to be a part thereof that has not been superseded or modified. The preceding sentence does not apply to statements in or omissions from any Issuer Free Writing Prospectus based upon or in conformity with written information furnished to the Operating Partnership by any Underwriter through the Representatives specifically for use therein.

The representations and warranties in this subsection shall not apply to statements in or omissions from any Issuer Free Writing Prospectus made in reliance upon and in conformity with written information furnished to the Operating Partnership by any Underwriter through UBS expressly for use therein.

As used in this subsection and elsewhere in this Agreement:

“Applicable Time” means 3:15 p.m. (Eastern Time) on December 5, 2006 or such other time as agreed by the Operating Partnership and UBS.

“Issuer Free Writing Prospectus” means any “issuer free writing prospectus,” as defined in Rule 433 of the 1933 Act Regulations (“Rule 433”), relating to the Notes that (i) is required to be filed with the Commission by the Operating Partnership, (ii) is a “road show that is a written communication” within the meaning of Rule 433(d)(8)(i), whether or not required to be filed with the Commission or (iii) is exempt from filing pursuant to Rule 433(d)(5)(i) because it contains a description of the Notes or of the offering that does not reflect the final terms, in each case in the form filed or required to be filed with the Commission or, if not required to be filed, in the form retained in the Operating Partnership’s records pursuant to Rule 433(g).

“Issuer General Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is intended for general distribution to prospective investors, as evidenced by its being specified in Schedule 2 hereto.

“Issuer Limited Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is not an Issuer General Use Free Writing Prospectus.

“Statutory Prospectus” as of any time means the prospectus relating to the Notes that is included in the Registration Statement immediately prior to that time, including any document incorporated by reference therein and any preliminary or other prospectus deemed to be a part thereof.

(5)           Incorporated Documents.   The Prospectus Supplement shall incorporate by reference the most recent Annual Report of the Company and the Operating Partnership on Form 10-K, as amended, filed with the Commission and each Quarterly Report of the Company and the Operating Partnership on Form 10-Q and each Current Report of the Company and the Operating Partnership on Form 8-K filed with the Commission since the filing of the Annual Report.  The documents incorporated or deemed to be incorporated by reference in the preliminary prospectus supplement or the Prospectus Supplement, at the time they were or hereafter are filed with the Commission, complied and shall comply in all material respects with the requirements of the 1934 Act and the rules and regulations of the Commission thereunder (the

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“1934 Act Regulations”) and, when read together with the other information in the Prospectus Supplement, at (a) the time the Original Registration Statement became effective, (b) the earlier of the time the preliminary prospectus supplement or the Prospectus Supplement was first used and the date and time of the first contract of sale of Notes in this offering, and (c) the Closing Time, did not and shall not include an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading.

(6)           Pending Proceedings and Examinations.   The Registration Statement is not the subject of a pending proceeding or examination under Section 8(d) or 8(e) of the 1933 Act, and the Operating Partnership is not the subject of a pending proceeding under Section 8A of the 1933 Act in connection with the offering of the Notes.

(7)           Independent Accountants .  The accountants who certified the financial statements and supporting schedules included, or incorporated by reference, in the Prospectus Supplement were independent registered public accountants with respect to the Company and its subsidiaries and the Operating Partnership and its subsidiaries, and the current accountants of the Company and the Operating Partnership are independent registered public accountants with respect to the Company and its subsidiaries and the Operating Partnership and its subsidiaries, in each case, as required by the 1933 Act and the rules and regulations promulgated by the Commission thereunder.

(8)           Financial Statements .  The financial statements included, or incorporated by reference, in the Registration Statement, General Disclosure Package and the Prospectus Supplement, together with the related schedules and notes, as well as those financial statements, schedules and notes of any other entity included therein, present fairly the financial position of the respective entity or entities or group presented therein at the respective dates indicated and the statement of operations, stockholders’ equity and cash flows of such entity, as the case may be, for the periods specified.  Such financial statements have been prepared in conformity with United States generally accepted accounting principles (“GAAP”) applied on a consistent basis throughout the periods involved.  The supporting schedules, if any, included, or incorporated by reference, in the Prospectus Supplement present fairly, in accordance with GAAP, the information stated therein.  The selected financial data, the summary financial information and other financial information and data included, or incorporated by reference, in the Prospectus Supplement present fairly the information shown therein and have been compiled on a basis consistent with that of the audited financial statements included, or incorporated by reference, in the Prospectus Supplement.  In addition, any pro forma financial information and the related notes thereto, if any, included, or incorporated by reference in the Registration Statement, General Disclosure Package or the Prospectus Supplement, as applicable, present fairly the information shown therein, have been prepared in accordance with the Commission’s rules and guidelines and the guidelines of the American Institute of Certified Public Accountants (“AICPA”) and the Public Company Accounting Oversight Board with respect to pro forma information and have been properly compiled on the bases described therein, and the assumptions used in the preparation thereof are reasonable and the adjustments used therein are appropriate to give effect to the transactions and circumstances referred to therein.  All disclosures contained in the Registration Statement, the General Disclosure Package or the Prospectus regarding “non-GAAP financial measures” (as such term is defined by the rules and regulations of the Commission) comply with Regulation G under the 1934 Act and Item 10 of Regulation S-K of the 1933 Act Regulations, to the extent applicable.

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(9)           Internal Accounting Controls.   The Company and the Operating Partnership each maintain a system of internal accounting controls sufficient to provide reasonable assurance that:  (a) transactions are properly authorized; (b) assets are safeguarded against unauthorized or improper use; (c) transactions are properly recorded and reported as necessary to permit preparation of its financial statements in conformity with GAAP and to maintain accountability for assets; and (d) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

(10)         Controls and Procedures.   The Company and the Operating Partnership have established and maintain disclosure controls and procedures (as such term is defined in Rule 13a-14 and 15d-14 under the Exchange Act); such disclosure controls and procedures are designed to ensure that material information relating to the Company and the Operating Partnership, including their consolidated subsidiaries, is recorded, processed, summarized and reported, within the time periods specified in the Commission’s rules and forms and is made known to the Company’s Chief Executive Officer and its Chief Financial Officer by others within those entities, as appropriate, to allow timely decisions regarding disclosure, and such disclosure controls and procedures are effective to perform the functions for which they were established; the Company’s and the Operating Partnership’s auditors and the Audit Committee of the Board of Directors of the Company have been advised of:  (i) any significant deficiencies in the design or operation of internal controls which could have a material effect on the Company’s and the Operating Partnership’s ability to record, process, summarize, and report financial data; and (ii) any fraud, whether or not material, that involves management or other employees who have a role in the Company’s and the Operating Partnership’s internal controls; any material weaknesses in internal control over financial reporting (whether or not remedied) have been disclosed to the Company’s and the Operating Partnership’s auditors; and since the date of the most recent evaluation of such disclosure controls and procedures, there have been no changes in internal control  over financial reporting or in other factors that has materially affected, or is reasonably likely to materially affect, internal control over financial reporting, including any corrective actions with regard to significant deficiencies and material weaknesses.

(11)         No Material Adverse Change in Business .  Since the respective dates as of which information is given in the Registration Statement, General Disclosure Package or Prospectus Supplement, except as otherwise stated therein, (a) there has been no material adverse change in the condition, financial or otherwise, or in the earnings, assets, business affairs or business prospects of the Company, any subsidiary of the Company, the Operating Partnership, any subsidiary of the Operating Partnership (other than any Property Partnership (as defined below)) (the Company, the Operating Partnership and such subsidiaries being sometimes hereinafter collectively referred to as the “Simon Entities” and individually as a “Simon Entity”), or of any entity which owns any Property (as such term is defined in the Prospectus Supplement) or any direct interest in any Property (the “Property Partnerships”) whether or not arising in the ordinary course of business, which, taken as a whole, would be material to the Company, the Operating Partnership and the other Simon Entities, taken as a whole (anything which, taken as a whole, would be material to the Company, the Operating Partnership and the other Simon Entities taken as a whole, being hereinafter referred to as “Material;” and such a material adverse change, a “Material Adverse Effect”), (b) no casualty loss or condemnation or other adverse event with respect to the Properties (as such term is defined in the Prospectus Supplement) has occurred which would be Material, (c) there have been no transactions or acquisitions entered into by the Simon Entities, other than those in the ordinary course of business, which would be Material, (d) except for distributions in amounts per unit that are consistent with past practices, there has been no distribution of any kind declared, paid or made by the Operating Partnership on any of its respective general, limited and/or preferred partnership interests, (e) there has been no change in

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the capital stock of the corporate Simon Entities or in the partnership interests of the Operating Partnership or any Property Partnership, and (f) there has been no increase in the indebtedness of the Simon Entities, the Property Partnerships or the Properties which would be Material.

(12)         Good Standing of the Company .  The Company has been duly organized and is validly existing as a corporation in good standing under the laws of the State of Delaware and has corporate power and authority to own, lease and operate its properties and to conduct its business as described in the Prospectus Supplement.  The Company is duly qualified as a foreign corporation to transact business and is in good standing in each other jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure to so qualify or be in good standing would not result in a Material Adverse Effect.

(13)         Good Standing of the Operating Partnership .  The Operating Partnership is duly organized and validly existing as a limited partnership in good standing under the laws of the State of Delaware, with the requisite power and authority to own, lease and operate its properties, to conduct the business in which it is engaged and proposes to engage as described in the Prospectus Supplement and to enter into and perform its obligations under this Agreement.  The Operating Partnership is duly qualified or registered as a foreign partnership and is in good standing in each jurisdiction in which such qualification or registration is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure to so qualify or register would not have a Material Adverse Effect.  The Company is the sole general partner of the Operating Partnership.  The amended and restated agreement of limited partnership of the Operating Partnership (the “OP Partnership Agreement”) is in full force and effect in the form in which it was filed as an exhibit to the Operating Partnership’s Annual Report on Form 10-K for the year ended December 31, 2000, as amended by the Amended and Restated Supplement dated as of October 14, 2004 and except for subsequent amendments relating to the admission of new partners to the Operating Partnership.

(14)         Good Standing of Simon Entities .  Each of the Simon Entities other than the Company and the Operating Partnership has been duly organized and is validly existing as a corporation, limited partnership, limited liability company or other entity, as the case may be, in good standing under the laws of the state of its jurisdiction of incorporation or organization, as the case may be, with the requisite power and authority to own, lease and operate its properties, and to conduct the business in which it is engaged or proposes to engage as described in the Prospectus Supplement.  Each such entity is duly qualified or registered as a foreign corporation, limited partnership or limited liability company or other entity, as the case may be, to transact business and is in good standing in each jurisdiction in which such qualification or registration is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure to so qualify or register would not have a Material Adverse Effect.  Except as otherwise stated in the Prospectus Supplement, all of the issued and outstanding capital stock or other equity interests of each such entity have been duly authorized and validly issued and are fully paid and non-assessable, have been offered and sold in compliance with all applicable laws (including without limitation, federal or state securities laws) and are owned by the Company or the Operating Partnership, directly or through subsidiaries, in each case free and clear of any security interest, mortgage, pledge, lien, encumbrance, claim or equity (collectively, “Liens”).  No shares of capital stock or other equity interests of such entities are reserved for any purpose, and there are no outstanding securities convertible into or exchangeable for any capital stock or other equity interests of such entities and no outstanding options, rights (preemptive or otherwise) or warrants to purchase or to subscribe for shares of such capital stock or any other securities of such entities, except as disclosed in the Prospectus Supplement.  No such shares of

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capital stock or other equity interests of such entities were issued in violation of preemptive or other similar rights arising by operation of law, under the charter or by-laws of such entity or under any agreement to which any Simon Entity is a party.

(15)         Capitalization .  The issued and outstanding units of general, limited and/or preferred partner interests of the Operating Partnership are as set forth in the Operating Partnership’s Quarterly Report on Form 10-Q filed on November 13, 2006 (except for subsequent issuances thereof, if any, contemplated under this Agreement or referred to in the Prospectus Supplement).

(16)         Authorization of Underwriting Agreement .  This Agreement has been duly authorized, executed and delivered by the Company and the Operating Partnership and, assuming due authorization, execution and delivery by or on behalf of the Underwriters, shall constitute a valid and legally binding agreement of the Company and the Operating Partnership, enforceable against the Company and the Operating Partnership in accordance with its terms except (a) to the extent that enforceability thereof may be limited by (i) bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance or other similar laws now or hereafter in effect relating to creditors’ rights generally and (ii) general principles of equity (regardless of whether considered at law or in equity); and (b) to the extent that rights to indemnification and contribution contained in this Agreement may be limited by state or federal securities laws or public policy.

(17)         Authorization of the Indenture .  For the Notes being sold pursuant to this Agreement, the Indenture has been, or prior to the issuance of the Notes thereunder shall have been, duly authorized, executed and delivered by the Operating Partnership and, upon such authorization, execution and delivery, shall constitute a valid and legally binding agreement of the Operating Partnership, enforceable against the Operating Partnership, in accordance with its terms, except as the enforcement thereof may be limited by (a) bankruptcy, insolvency, reorganization, moratorium or other similar laws relating to or affecting creditors’ rights generally, (b) general equitable principles (regardless of whether enforcement is considered in a proceeding in equity or at law), (c) requirements that a claim with respect to any Notes issued under the Indenture that are payable in a foreign or composite currency (or a foreign or composite currency judgment in respect of such claim) be converted into U.S. dollars at a rate of exchange prevailing on a date determined pursuant to applicable law, or (d) governmental authority to limit, delay or prohibit the making of payments outside the United States.  The Indenture has been duly qualified under the 1939 Act and conforms, in all material respects, to the descriptions thereof contained in the Prospectus Supplement.

(18)         Authorization of the Notes .  The Notes being sold pursuant to this Agreement have been duly authorized by the Operating Partnership for issuance and sale pursuant to this Agreement, and, at the Closing Time, will have been duly executed by Operating Partnership.  Such Notes, when issued and authenticated in the manner provided for in the applicable Indenture and delivered by the Operating Partnership pursuant to this Agreement against payment of the consideration therefor specified in this Agreement, shall constitute valid and legally binding, unsecured obligations of the Operating Partnership, enforceable against the Operating Partnership, in accordance with their terms, except as the enforcement thereof may be limited by bankruptcy, insolvency, reorganization, moratorium or other similar laws relating to or affecting creditors’ rights generally or by general equitable principles, and except further as enforcement thereof may be limited by (a) requirements that a claim with respect to any Notes denominated other than in U.S. dollars (or a foreign or composite currency judgment in respect of such claim) be converted into U.S. dollars at a rate of exchange prevailing on a date determined pursuant to applicable law or (b) governmental authority to limit, delay or prohibit the making of

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payments outside the United States.  Such Notes shall be in the form contemplated by, and each registered holder thereof shall be entitled to the benefits of, the applicable Indenture.  Such Notes rank and shall rank equally with all unsecured indebtedness (other than subordinated indebtedness) of the Operating Partnership that is outstanding on a Reporting Date (as such term is defined in the Prospectus Supplement) or that may be incurred thereafter and senior to all subordinated indebtedness that is outstanding on a Reporting Date or that may be incurred thereafter, except that such Notes shall be effectively subordinate to the prior claims of each secured mortgage lender to any specific Property which secures such lender’s mortgage and any claims of creditors of entities wholly or partly owned, directly or indirectly, by the Operating Partnership.

(19)         Descriptions of the Notes and the Indenture .  The Notes being sold pursuant to this Agreement and the Indenture shall conform in all material respects to the statements relating thereto contained in the Prospectus Supplement and shall be in substantially the respective forms previously delivered to the Underwriters.

(20)         Absence of Defaults and Conflicts .  None of the Simon Entities or any Property Partnership is in violation of its charter, by-laws, certificate of limited partnership or partnership agreement or other organizational document, as the case may be, or in default in the performance or observance of any obligation, agreement, covenant or condition contained in any contract, indenture, mortgage, deed of trust, loan or credit agreement, note, lease or other agreement or instrument to which each entity is a party or by which or any of them may be bound, or to which any of its property or assets or any Property may be bound or subject (collectively, “Agreements and Instruments”), except for such violations (other than with respect to the charter, by-laws, partnership agreement, or other organizational document of such entities) or defaults that would not result in a Material Adverse Effect.  The execution, delivery and performance of this Agreement, the Notes, the Indenture and any other agreement or instrument entered into or issued or to be entered into or issued by the Company or the Operating Partnership in connection with the transactions contemplated hereby or thereby or in the Prospectus Supplement and the consummation of the transactions contemplated herein and in the Prospectus Supplement (including the issuance and sale of the Notes and the use of the proceeds from the sale of the Notes as described under the caption “Use of Proceeds”) and compliance by each of the Company and the Operating Partnership with its obligations hereunder and thereunder have been duly authorized by all necessary action, and do not and shall not, whether with or without the giving of notice or passage of time or both, conflict with or constitute a breach of, or default or Repayment Event (as defined below) under, or result in the creation or imposition of any lien, charge or encumbrance upon any assets, properties or operations of the Operating Partnership or any other Simon Entity or any Property Partnership pursuant to, any Agreements and Instruments, except for such conflicts, breaches, defaults, Repayment Events or liens, charges or encumbrances that, singly or in the aggregate, would not result in a Material Adverse Effect, nor shall such action result in any violation of the provisions of the OP Partnership Agreement or certificate of limited partnership of the Operating Partnership or the organizational documents of any other Simon Entity or any applicable law, statute, rule, regulation, judgment, order, writ or decree of any government, government instrumentality or court, domestic or foreign, having jurisdiction over the Operating Partnership, any other Simon Entity or any Property Partnership or any of their assets, properties or operations, except for such violations (other than with respect to the charter, by-laws, partnership agreement, or other organizational document of such entities) that would not have a Material Adverse Effect.  As used herein, a “Repayment Event” means any event or condition which gives the holder of any note, debenture or other evidence of indebtedness (or any person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a material portion of such indebtedness by the Operating Partnership, any other Simon Entity or any Property Partnership.

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(21)         Absence of Proceedings .  Except as described in the Prospectus Supplement, there is no action, suit, proceeding, inquiry or investigation before or by any court or governmental agency or body, domestic or foreign, now pending, or to the knowledge of the Operating Partnership threatened against or affecting the Operating Partnership, any other Simon Entity, or any Property Partnership or any officer or director of the Operating Partnership, except such as would not reasonably be expected to result in a Material Adverse Effect, or which might reasonably be expected to materially and adversely affect the assets, properties or operations thereof or the consummation of this Agreement, the Indenture or the transactions contemplated herein or therein or the performance by the Operating Partnership of its obligations hereunder.  The aggregate of all pending legal or governmental proceedings to which the Operating Partnership or any other Simon Entity, or any Property Partnership is a party or of which any of their respective assets, properties or operations is the subject which are not described in the Prospectus Supplement including ordinary routine litigation incidental to the business, could not reasonably be expected to result in a Material Adverse Effect.

(22)         REIT Qualification .  At all times since January 1, 1973, the Company (including as Corporate Property Investors, a Massachusetts business trust) has been, and upon the sale of the applicable Notes, the Company shall continue to be, organized and operated in conformity with the requirements for qualification and taxation as a real estate investment trust under the Code, and its current and proposed methods of operation shall enable it to continue to meet the requirements for qualification and taxation as a real estate investment trust under the Code.

(23)         Investment Company Act .  Each of the Operating Partnership, the other Simon Entities and the Property Partnerships is not, and upon the issuance and sale of the Notes as herein contemplated and the application of the net proceeds therefrom as described in the Prospectus Supplement shall not be, an “investment company” within the meaning of the Investment Company Act of 1940, as amended (the “1940 Act”).

(24)         Absence of Further Requirements .  No filing with, or authorization, approval, consent, license, order, registration, qualification or decree of, any court or governmental authority or agency or any other entity or person is necessary or required for the performance by the Operating Partnership of its obligations under this Agreement, the Indenture or in connection with the transactions contemplated under this Agreement or the Indenture, except such as have been already obtained under the 1933 Act or the 1933 Act Regulations or as may be required under state securities laws or under the by-laws and rules of the National Association of Securities Dealers, Inc. (the “NASD”).

(25)         Possession of Licenses and Permits .  The Operating Partnership and the other Simon Entities and each Property Partnership possess such permits, licenses, approvals, consents and other authorizations (collectively, “Governmental Licenses”) issued by the appropriate federal, state, local or foreign regulatory agencies or bodies necessary to conduct the business now operated by them except for such Governmental Licenses the failure to obtain would not, singly or in the aggregate, result in a Material Adverse Effect.  The Operating Partnership and the other Simon Entities and each Property Partnership are in compliance with the terms and conditions of all such Governmental Licenses, except where the failure so to comply would not, singly or in the aggregate, result in a Material Adverse Effect.  All of the Governmental Licenses are valid and in full force and effect, except where the invalidity of such Governmental Licenses or the failure of such Governmental Licenses to be in full force and effect would not result in a

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Material Adverse Effect.  None of the Operating Partnership, any of the other Simon Entities or any Property Partnership has received any notice of proceedings relating to the revocation or modification of any such Governmental Licenses which, singly or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would result in a Material Adverse Effect.

(26)         Title to Property .  The Operating Partnership, the other Simon Entities and the Property Partnerships have good and marketable title to the Properties free and clear of Liens, except (a) as otherwise stated in the Prospectus Supplement, or referred to in any title policy for such Property, or (b) those which do not, singly or in the aggregate, Materially (i) affect the value of such property or (ii) interfere with the use made and proposed to be made of such property by the Operating Partnership, any other Simon Entity or any Property Partnership.  All leases and subleases under which the Operating Partnership, any other Simon Entity or any Property Partnerships hold properties are in full force and effect, except for such which would not have a Material Adverse Effect.  None of the Operating Partnership, the other Simon Entities or the Property Partnerships has received any notice of any Material claim of any sort that has been asserted by anyone adverse to the rights of the Operating Partnership, any other Simon Entity or the Property Partnerships under any material leases or subleases, or affecting or questioning the rights of the Operating Partnership, such other Simon Entity or the Property Partnerships of the continued possession of the leased or subleased premises under any such lease or sublease, other than claims that would not have a Material Adverse Effect.  All liens, charges, encumbrances, claims or restrictions on or affecting any of the Properties and the assets of any Simon Entity or any Property Partnership which are required to be disclosed in the Prospectus Supplement are disclosed therein.  None of the Simon Entities, the Property Partnerships or any tenant of any of the Properties is in default under any of the ground leases (as lessee) or space leases (as lessor or lessee, as the case may be) relating to, or any of the mortgages or other security documents or other agreements encumbering or otherwise recorded against, the Properties, and the Operating Partnership knows of no event which, but for the passage of time or the giving of notice, or both, would constitute a default under any of such documents or agreements, in each case, other than such defaults that would not have a Material Adverse Effect.  No tenant under any of the leases, pursuant to which the Operating Partnership or any Property Partnership, as lessor, leases its Property, has an option or right of first refusal to purchase the premises demised under such lease, the exercise of which would have a Material Adverse Effect.  Each of the Properties complies with all applicable codes, laws and regulations (including, without limitation, building and zoning codes, laws and regulations and laws relating to access to the Properties), except for such failures to comply that would not in the aggregate have a Material Adverse Effect.  The Operating Partnership has no knowledge of any pending or threatened condemnation proceeding, zoning change, or other proceeding or action that will in any manner affect the size of, use of, improvements on, construction on or access to, the Properties, except such proceedings or actions that would not have a Material Adverse Effect.

(27)         Environmental Laws .  Except as otherwise stated in the Prospectus Supplement and except such violations as would not, singly or in the aggregate, result in a Material Adverse Effect, (a) none of the Operating Partnership, the other Simon Entities or any Property Partnership is in violation of any federal, state, local or foreign statute, law, rule, regulation, ordinance, code, policy or rule of common law and any judicial or administrative interpretation thereof including any judicial or administrative order, consent, decree of judgment, relating to pollution or protection of human health, the environment (including, without limitation, ambient air, surface water, groundwater, land surface or subsurface strata) including, without limitation, laws and regulations relating to the release or threatened release of chemicals, pollutants, contaminants, wastes, toxic substances, hazardous substances, petroleum or petroleum products (collectively, “Hazardous Materials”) or to the manufacture, processing, distribution, use,

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treatment, storage, disposal, transport or handling of Hazardous Materials (collectively, “Environmental Laws”), (b) the Operating Partnership, the other Simon Entities and the Property Partnerships have all permits, authorizations and approvals required under any applicable Environmental Laws and are each in compliance with their requirements, (c) there are no pending or threatened administrative, regulatory or judicial actions, suits, demands, demand letters, claims, liens, notices of noncompliance or violation, investigation or proceedings relating to any Environmental Law against the Operating Partnership, any of the other Simon Entities or the Property Partnerships and (d) there are no events or circumstances that might reasonably be expected to form the basis of an order for clean-up or remediation, or an action, suit or proceeding by any private party or governmental body or agency, against or affecting the Operating Partnership, any of the other Simon Entities or any Property Partnership relating to any Hazardous Materials or the violation of any Environmental Laws.

(28)         Insurance .  Each of the Operating Partnership, the Company and the Property Partnerships maintains insurance covering its properties, assets, operations, personnel and businesses, and such insurance is of such type and in such amounts in accordance with customary industry practice to protect it and its business.

(29)         Reporting Company .  Each of the Operating Partnership and the Company is subject to the reporting requirements of Section 13 or Section 15(d) of the 1934 Act.

(30)         Investment-Grade Rating .  The Notes shall have an investment-grade rating from one or more nationally recognized statistical rating organizations at each applicable Reporting Date, as set forth in the Final Term Sheet.

(31)         Statistical Data and Forward-Looking Statements .  The statistical and market-related data and forward-looking statements (within the meaning of Section 27A of the Act and Section 21E of the 1934 Act) included in the Prospectus Supplement are based on or derived from sources that the Operating Partnership believes to be reliable and accurate in all material respects and represent its good faith estimates that are made on the basis of data derived from such sources.

(32)         Price Manipulation and Market Stabilization .  Neither the Simon Entities nor any of their respective directors, officers, affiliates or controlling persons has taken, directly or indirectly, any action designed, or which has constituted or might reasonably be expected to cause or result in, under the Exchange Act or otherwise, the stabilization or manipulation of the price of any security of the Operating Partnership to facilitate the sale or resale of the Notes.

(33)         Foreign Corrupt Practices Act .  Neither the Operating Partnership nor, to its knowledge, any other Simon Entity or any Property Partnership, nor any director, officer, agent, employee or other person associated with or acting on behalf of the Operating Partnership or any other Simon Entity or any Property Partnership, has used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; made any direct or indirect unlawful payment to any foreign or domestic government official or employee from corporate funds; violated or is in violation of any provision of the Foreign Corrupt Practices Act of 1977; or made any bribe, rebate, payoff, influence payment, kickback or other unlawful payment.

(b)           Officers’ Certificates.   Any certificate signed by any officer of the Operating Partnership or any authorized representative of the Company delivered to the Representatives or to counsel for the Underwriters in connection with the offering of the Notes shall be deemed a representation and warranty

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by such entity or person, as the case may be, to each Underwriter as to the matters covered thereby on the date of such certificate and, unless subsequently amended or supplemented, at each Representation Date subsequent thereto.

SECTION 2.           Sale and Delivery to the Underwriters; Closing .

(a)           Notes.   On the basis of the representations and warranties contained herein and subject to the terms and conditions herein set forth, the Operating Partnership agrees to sell to each Underwriter, severally and not jointly, and each Underwriter, severally and not jointly, agrees to purchase from the Operating Partnership, at the price of 99.254% for the 2012 Notes and 98.757% for the 2016 Notes, the aggregate principal amount of Notes set forth in Schedule 1 opposite the name of such Underwriter, plus any additional principal amount of Notes which such Underwriter may become obligated to purchase pursuant to the provisions of Section 11 hereof.

(b)           Payment.   Payment of the purchase price for, and delivery of, the Notes shall be made at the office of Clifford Chance US LLP, 31 West 52 nd  Street, New York, New York 10019, or at such other place as shall be agreed upon by the Representatives and the Operating Partnership, at 10:00 A.M. (Eastern time) on the fifth business day after the date hereof (unless postponed in accordance with the provisions of Section 11), or such other time not later than ten business days after such date as shall be agreed upon by the Representatives and the Operating Partnership (such time and date of payment and delivery being herein called the “Closing Time”).

Payment shall be made to the Operating Partnership by wire transfer of same day funds payable to the order of the Operating Partnership,