Exhibit 32.1

                                    CERTIFICATION PURSUANT TO
                                     18 U.S.C. SECTION 1350,
                                     AS ADOPTED PURSUANT TO
                         SECTION 906 OF THTE SARBANES-OXLEY ACT OF 2002


     In connection with the Annual Report of AmBase  Corporation  (the "Issuer")
on Form  10-K  for the  period  ending  December  31,  2004 as  filed  with  the
Securities and Exchange Commission on the date hereof (the "Report"), I, Richard
A. Bianco, Chief Executive Officer of the Issuer, certify, pursuant to 18 U.S.C.
Section 1350, as adopted  pursuant to Section 906 of the  Sarbanes-Oxley  Act of
2002, that:

     (1) The Report fully  complies  with the  requirements  of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

     (2)  The  information  contained  in the  Report  fairly  presents,  in all
material  respects,  the  financial  condition  and result of  operations of the
Issuer.



/s/ Richard A. Bianco
Richard A. Bianco
Chairman, President and Chief Executive Officer
AmBase Corporation
March 30, 2005