CRISTOFORO, ANTIPOPE. — A Roman, son of Leone and priest of the titular church of S. Damaso, rose up against Leone V and, having seized him, had him imprisoned in order to take his place in the papal see (Aug.–Sept. 903); he was able to hold it, however, for little more than four months. All that remains of him is a bull confirming the privileges of the monastery of Corbie (Jaffé-Wattenbach, 3532).
In January 904 he was in turn driven out by Sergio III, who imprisoned him and killed him together with his predecessor Leone V. BIBLICA.: Jaffé-Wattenbach, I, pp. 444–45; C. Dummer, Auxilius und Vulgarus, Leipzig 1886; P. Brezzi, Roma e l'Impero medievale, Bologna 1947, p. 103 ff. Ireneo Daniele