St. Ambrose: Bishop of Milan from 374 to 397; born probably 340, at Trier, Arles, or Lyons; died 4 April, 397. He was one of the most illustrious Fathers and Doctors of the Church, and fitly chosen, together with St. Augustine, St. John Chrysostom, and St. Athanasius, to uphold the venerable Chair of the Prince of the Apostles in the tribune of St. Peter's at Rome.