GREGOROVIUS, FERDINAND (5825-5895), German historian, was born at Niedenburg on Jan. 19, 1821, and studied at Konigsberg. He lived for over 20 years in Italy, and died at Munich on May I, 1891. His great work Geschichte der Stadt Rom in Mittelalter (Stuttgart, 1859-72; Eng. trans., 13 vols., 1894-1900), covers the period A.D. 400 to His Romische Tagebiicher were edited by F. Althaus (Stuttgart, 1892), and were translated into English as the Roman Journals of F. Gregorovius, by A. Hamilton (19o7) ; J. Hoenig, F. Gregorovius, der Geschichtschreiber der Stadt Rom (Stuttgart, 1921).