Probably born in Rome, c.304;died there, 384. His election, 366, was disputed by the anti-pope Ursicinus but Valentinian recognized him as the legitimate pontiff. As pope he opposed Arianism, and condemned Apollinarianism and Macedonianism. At his suggestion Saint Jerome completed the Vulgate. He successfully maintained the primacy of the Apostolic See, and welcomed the edict of Theodosius I, which made Catholism the religion of the Roman state. His interest in the martyrs led him to restore the catacombs, and to compose many beautiful epitaphs and inscriptions on their tombs. Feast, December 11,.