EXHIBIT 23.3 ERNST & YOUNG [LOGO] Reid Hall Phone: (441) 295-7000 3 Reid Street Fax: (441) 295-5193 Hamilton HM 11, Bermuda www.ey.com/bermuda P.O. Box HM 463 Hamilton HM BX, Bermuda CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the reference to our firm under the caption "Experts" in the Registration Statement of RenaissanceRe Holdings Ltd. for the registration of $250,000,000 of securities and to the incorporation by reference therein of our reports dated January 30, 2004, with respect to the consolidated financial statements and schedules of RenaissanceRe Holdings Ltd. included in its Annual Report (Form 10-K) for the year ended December 31, 2003, filed with the Securities and Exchange Commission. /s/ Ernst & Young Hamilton, Bermuda July 8, 2004