LIMITED POWER OF ATTORNEY

       The undersigned hereby constitutes and appoints each of Thomas N.
Keltner, Jr., Jonathan A. Kotler, Heather M. Lawson, and Yoel Kranz, signing
singly, and with full power of substitution, the undersigned's true and lawful
attorney-in-fact to:

       (1)    complete and execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer, director and/or ten percent (10%)
shareholder of Empire State Realty Trust, Inc. (the "Company") any and all
instruments, certificates and documents required to be executed on behalf of the
undersigned as an individual or on behalf of the undersigned's company or
partnership, as the case may be, pursuant to Section 13 and Section 16 of the
Securities Exchange Act of 1934, as amended (the "Exchange Act") or the rules
and regulations thereunder;

       (2)    do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete and execute any such
instruments, cert ificates or documents required to be filed pursuant to Section
13 and Section 16 of the Exchange Act or the rules or regulations thereunder,
and timely file such form(s) with the Securities and Exchange Commission and any
securities exchange, stock exchange or similar authority; and

       (3)    take any other action of any type whatsoever in connection with
the foregoing which, in the opinion of such attorney-in-fact, may be of
benefit to, in the best interest of, or legally required by, the undersigned, it
being understood that the documents executed by any such attorney-in-fact on
behalf of the undersigned pursuant to this Power of Attorney shall be in such
form and shall contain such terms and conditions as such attorney-in-fact may
approve in such attorney-in-fact's discretion.

       The undersigned hereby grants to each such attorney-in-fact, acting
singly, full power and authority to do and perform any and every act which is
necessary, proper or desirable to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that any such
attorney-in-fact, or any such attorney-in-fact's substitute or substitutes,
shall lawfully do or cause to be done by virtue of this power of attorney and
the rights and powers herein granted. The undersigned acknowledges that each of
the foregoing attorneys-in-fact, in serving in such capacity at the request of
the undersigned, is not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 13 or Section 16 of the
Exchange Act. The undersigned hereby agrees to indemnify the attorneys-in-fact
and the Company from and against any demand, damage, loss, cost or expense
arising from any false or misleading information provided by the undersigned to
the attorneys-in-fact.

       This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file any instruments, certificates and
documents pursuant to Section 13 and Section 16 of the Exchange Act or the rules
or regulations thereunder with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier revoked by the
undersigned in a signed writing delivered to the foregoing attorneys-in-fact c/o
Empire State Realty Trust, Inc., 111 West 33rd Street, 12th Floor, New York, New
York 10120. This Power of Attorney supersedes any prior power of attorney in
connection with the undersigned's capacity as an officer and/or director of the
Company. This Power of Attorney shall expire as to any individual attorney-in-
fact if such attorney-in-fact ceases to be an executive officer of, or legal
counsel to, the Company.

       IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of May 7, 2020.

       /s/ Christina Chiu                Christina Chiu