ARTICLES SUPPLEMENTARY RELATING STRATEGIC HOTEL CAPITAL, INC

Exhibit 3.1

8.50% Series A Cumulative Redeemable Preferred Stock

ARTICLES SUPPLEMENTARY

STRATEGIC HOTEL CAPITAL, INC.

Articles Supplementary Classifying

and Designating a Series of Preferred Stock as

8.50% Series A Cumulative Redeemable Preferred Stock

and Fixing Dividend and Other Preferences and Rights of Such Series

Dated as of March 15, 2005

STRATEGIC HOTEL CAPITAL, INC.

Articles Supplementary Classifying

and Designating a Series of Preferred Stock as

8.50% Series A Cumulative Redeemable Preferred Stock

and Fixing Dividend and Other Preferences and Rights of Such Series

Strategic Hotel Capital, Inc., a Maryland corporation (the “ Corporation ”), hereby certifies to the State Department of Assessments and Taxation of Maryland pursuant to section 2-208 of the Maryland General Corporation Law ( the “ MGCL ”) that:

FIRST: Pursuant to the authority granted and vested in the Board of Directors of the Corporation (the “ Board of Directors ”) by Article VI, Sections 6.3 and 6.4 of the Articles of Amendment and Restatement dated June 22, 2004 (as amended or supplemented from time to time, the “ Articles ”), the Board of Directors, by duly adopted resolutions, has classified 4,600,000 unissued shares of Preferred Stock (as defined in the Articles) of the Corporation as 8.50% Series A Cumulative Redeemable Preferred Stock, $0.01 par value per share (the “ Series A Preferred Shares ”).

SECOND: The following is a description of the Series A Preferred Shares, including the preferences, conversion or other rights, voting powers, restrictions, limitations as to dividends, qualifications, and terms and conditions of redemption thereof which, upon any restatement of the Articles, shall become part of Article VI thereof, with any necessary or appropriate renumbering or relettering of the sections or subsections thereof:

8.50% Series A Cumulative Redeemable Preferred Stock

Section 1. Number of Shares and Designation . This class of Preferred Stock shall be designated as 8.50% Series A Cumulative Redeemable Preferred Stock (the “ Series A Preferred Shares ”) and the number of shares which shall constitute such series shall be 4,600,000, $0.01 par value per share.

Section 2. Definitions . For purposes of the Series A Preferred Shares, the following terms shall have the meanings indicated:

“ Board of Directors ” shall mean the Board of Directors of the Corporation or any committee authorized by such Board of Directors to perform any of its responsibilities with respect to the Series A Preferred Shares.

“ Business Day ” shall mean any day other than a Saturday, Sunday or a day on which state or federally chartered banking institutions in New York City, New York are not required to be open.

“ Call Date ” shall mean the date fixed for redemption of the Series A Preferred Shares and specified in the notice to holders required under subparagraph (d) of Section 5 as the Call Date.

“ Common Shares ” shall mean the shares of Common Stock of the Corporation, par value $0.01 per share.

“ Dividend Payment Date ” shall mean the last calendar day of March, June, September and December in each year, commencing on June 30, 2005; provided , however , that if any Dividend Payment Date falls on any day other than a Business Day, the dividend payment due on such Dividend Payment Date shall be paid on the Business Day immediately following such Dividend Payment Date and no interest or other sum shall accumulate or be paid on the amount so payable for the period after such Dividend Payment Date to such next Business Day.

“ Dividend Periods ” shall mean quarterly dividend periods commencing on January 1, April 1, July 1 and October 1 of each year and ending on and including the day preceding the first day of the next succeeding Dividend Period (other than the initial Dividend Period, which shall commence on the Issue Date and end on and include June 30, 2005, and other than the Dividend Period during which any Series A Preferred Shares shall be redeemed pursuant to Section 5, which shall end on and include the Call Date with respect to the Series A Preferred Shares being redeemed).

“ Fully Junior Shares ” shall mean the Common Shares and any other class or series of shares of stock of the Corporation now or hereafter issued and outstanding over which the Series A Preferred Shares have preference or priority in both (i) the payment of dividends and (ii) the distribution of assets on any liquidation, dissolution or winding up of the Corporation.

“ Issue Date ” shall mean March 16, 2005.

“ Junior Shares ” shall mean the Common Shares and any other class or series of shares of stock of the Corporation now or hereafter issued and outstanding over which the Series A Preferred Shares have preference or priority in the payment of dividends or in the distribution of assets on any liquidation, dissolution or winding up of the Corporation and, unless the context clearly indicates otherwise, shall include Fully Junior Shares.

“ Parity Shares ” shall have the meaning set forth in paragraph (b) of Section 7.

“ Person ” shall mean any individual, firm, partnership, limited liability company, corporation or other entity, and shall include any successor (by merger or otherwise) of such entity.

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“ Series A Preferred Shares ” shall have the meaning set forth in Section 1 hereof.

“ set apart for payment ” shall be deemed to include, without any action other than the following: the recording by the Corporation in its accounting ledgers of any accounting or bookkeeping entry which indicates, pursuant to an authorization by the Board of Directors and a declaration of dividends or other distribution by the Corporation, the allocation of funds to be so paid on any series or class of shares of stock of the Corporation; provided , however , that if any funds for any class or series of Junior Shares or any class or series of shares of stock ranking on a parity with the Series A Preferred Shares as to the payment of dividends are placed in a separate account of the Corporation or delivered to a disbursing, paying or other similar agent, then “set apart for payment” with respect to the Series A Preferred Shares shall mean placing such funds in a separate account or delivering such funds to a disbursing, paying or other similar agent.

“ Transfer Agent ” means LaSalle Bank, N.A., Chicago, Illinois, or such other agent or agents of the Corporation as may be designated by the Board of Directors or their designee as the transfer agent, registrar and dividend disbursing agent for the Series A Preferred Shares.

“ Voting Preferred Shares ” shall have the meaning set forth in Section 8 hereof.

Section 3. Dividends .

(a) The holders of Series A Preferred Shares shall be entitled to receive, when, as and if authorized by the Board of Directors and declared by the Corporation out of funds legally available for that purpose, dividends payable in cash in an amount per share equal to 8.50% of the liquidation preference per annum (equivalent to $2.125 per share annum), except as provided in Section 3(b). Such dividends shall begin to accrue and shall be fully cumulative from the Issue Date, whether or not in any Dividend Period or Periods there shall be funds of the Corporation legally available for the payment of such dividends, and shall be payable quarterly, when, as and if authorized by the Board of Directors and declared by the Corporation, in arrears on Dividend Payment Dates, commencing on the first Dividend Payment Date after the Issue Date. Each such dividend shall be payable in arrears to the holders of record of Series A Preferred Shares, as they appear on the stock records of the Corporation at the close of business on such record dates, not less than 10 nor more than 50 days preceding such Dividend Payment Dates thereof, as shall be fixed by the Board of Directors. Accrued and unpaid dividends on the Series A Preferred Shares for any past Dividend Periods may be declared and paid at any time and for such interim periods, without reference to any regular Dividend Payment Date, to holders of record on such date, not less than 10 nor more than 50 days preceding the payment date thereof, as may be fixed by the Board of Directors.

(b) The amount of dividends payable for each full Dividend Period for the Series A Preferred Shares shall be computed by dividing the annual dividend rate by four. The amount of dividends payable for the initial Dividend Period, or any other period shorter or longer than a full Dividend Period, on the Series A Preferred Shares shall be

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computed on the basis of twelve 30-day months and a 360-day year. Holders of Series A Preferred Shares shall not be entitled to any dividends, whether payable in cash, property or stock, in excess of cumulative dividends, as herein provided, on the Series A Preferred Shares. No interest, or sum of money in lieu of interest, shall be payable in respect of any dividend payment or payments on the Series A Preferred Shares that may be in arrears.

(c) So long as any Series A Preferred Shares are outstanding, no full dividends, except as described in the immediately following sentence, shall be declared or paid or set apart for payment on any class or series of Parity Shares, as to dividends, for any period unless full cumulative dividends have been or contemporaneously are declared and paid or declared and a sum sufficient for the payment thereof set apart for such payment on the Series A Preferred Shares for all past Dividend Periods terminating on or prior to the dividend payment date on such class or series of Parity Shares. When dividends are not paid in full (or a sum sufficient for such full payment is not so set apart), as aforesaid, all dividends declared upon the Series A Preferred Shares and all dividends declared upon any other class or series of Parity Shares, as to dividends, shall be declared ratably in proportion to the respective amounts of dividends accumulated and unpaid on the Series A Preferred Shares and accumulated and unpaid on such Parity Shares.

(d) So long as any Series A Preferred Shares are outstanding, no dividends (other than dividends or distributions paid solely in shares of, or options, warrants or rights to subscribe for or purchase shares of, Fully Junior Shares) shall be declared or paid or set apart for payment or other distribution declared or made upon Junior Shares, as to dividends, nor shall any Junior Shares, as to dividends, 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 Junior Shares, as to dividends) by the Corporation, directly or indirectly (except by conversion into or exchange for Fully Junior Shares), unless in each case (i) the full cumulative dividends on all outstanding Series A Preferred Shares and any other Parity Shares, as to dividends, of the Corporation shall have been paid or declared and set apart for payment for all past Dividend Periods with respect to the Series A Preferred Shares and all past dividend periods with respect to such Parity Shares and (ii) sufficient funds shall have been paid or declared and set apart for the payment of the dividend for the current Dividend Period with respect to the Series A Preferred Shares and the current dividend period with respect to such Parity Shares. Any dividend payment on the Series A Preferred Shares shall first be credited against the earliest accrued but unpaid dividend due which remains payable.

(e) No distributions on Series A Preferred Shares shall be authorized by the Board of Directors of the Corporation or declared and paid or set apart for payment by the Corporation at such time as the terms and provisions of any agreement of the Corporation, including any agreement relating to its indebtedness for borrowed money, prohibits such declaration, payment or setting apart for payment or provides that such declaration, payment or setting apart for payment would constitute a breach thereof or a default thereunder, or if such declaration or payment shall be restricted or prohibited by law.

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(f) If, for any taxable year, the Board of Directors of the Corporation elects to designate as “capital gain dividends” (as defined in Section 857 of the Internal Revenue Code of 1986, as amended), any portion of the dividends (as determined for federal income tax purposes) paid or made available for the year to holders of all classes of shares of stock of the Corporation, then the portion of such designated amount that shall be allocable to the holders of Series A Preferred Shares shall be the amount that the total dividends (as determined for federal income tax purposes) paid or made available to the holders of the Series A Preferred Shares for the year bears to the total dividends paid or made available for the year to holders of all classes of shares of stock of the Corporation.

Section 4. Liquidation Preference .

(a) In the event of any liquidation, dissolution or winding up of the Corporation, whether voluntary or involuntary, before any payment or distribution of the assets of the Corporation (whether capital or surplus) shall be made to or set apart for the holders of Junior Shares, as to the distribution of assets on any liquidation, dissolution or winding up of the Corporation, the holders of the Series A Preferred Shares shall be entitled to receive Twenty-Five Dollars ($25.00) per Series A Preferred Share plus an amount equal to all dividends (whether or not earned or declared) accrued and unpaid thereon to the date of final distribution to such holders; but such holders shall not be entitled to any further payment. If, upon any liquidation, dissolution or winding up of the Corporation, the assets of the Corporation, or proceeds thereof, distributable among the holders of the Series A Preferred Shares shall be insufficient to pay in f