Exhibit 24.1

                               POWER OF ATTORNEY



      Know all by these presents, that the undersigned hereby constitutes and
appoints each of, Stephen S. Yoder and Darlene Deptula-Hicks of Pieris
Pharmaceuticals, Inc. and Anne Leland, Brenda Meyette, Jacquelyn Cannata, Marc
Mantell and Caroline Gammill of Mintz, Levin, Cohn, Ferris, Glovsky and Popeo,
P.C. signing singly, with full power of substitution, the undersigned's true
and lawful attorney-in-fact to:

      (1) execute for and on behalf of the undersigned, forms and authentication
          documents for EDGAR Filing Access;

      (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 forms and authentication documents;

      (3) execute for and on behalf of the undersigned, in the
          undersigned's capacity as an officer, director and/or 10% shareholder
          of the Company, Forms 3, 4 and 5 in accordance with Section 16(a) of
          the Securities Exchange Act of 1934 and the rules thereunder;

      (4) 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 Form 3, 4 or 5 and timely file such form with the
          United States Securities and Exchange Commission and any stock
          exchange or similar authority; and

      (5) 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 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 full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper 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 such attorney-in-fact, or 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 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 16 of the Securities Exchange Act of 1934.

     This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 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.

     IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed this 21st day of November, 2016.


                    /s/ Claude Knopf
                    -----------------------------------
                    Claude Knopf