Ambrose, † Holy Saturday, 397; born in Trier of noble parents; classically educated; while still a catechumen chosen by popular acclaim as bishop of Milan and consecrated 7 December 374; his allegorical exegesis and rhetorical skill made him a compelling preacher; defender of orthodoxy against Arianism; brought Theodosius to public penance; composed several liturgical hymns; baptized Augustine; along with Sts. Jerome, Augustine, and Gregory I, declared one of the four great doctors of the Latin Church (by Pope Boniface VIII, 1298).