Saint Ambrose, Latin Ambrosius (born ad 339, Augusta Treverorum, Belgica, Gaul—died 397, Milan; feast day December 7), bishop of Milan, biblical critic, and initiator of ideas that provided a model for medieval conceptions of church–state relations. His literary works have been acclaimed as masterpieces of Latin eloquence, and his musical accomplishments are remembered in his hymns. Ambrose is also remembered as the teacher who converted and baptized St. Augustine of Hippo, the great Christian theologian, and as a model bishop who viewed the church as rising above the ruins of the Roman Empire.