St. Ambrose
St. Ambrose (340-397) was born at Treves in Gaul, a territory which embraced modern France, Britain, Spain, and part of Africa. He studied in Rome and later became governor of Liguria and Aemelia with residence at Milan. While supervising the election of a new bishop of Milan in 374, he himself was suddenly acclaimed the bishop. He was only a catechumen at the time and was ordained a priest and consecrated a bishop on December 7. He wrote much on the Scriptures and Fathers, preached a homily every Sunday, resisted the interference of the secular powers with the rights of the Church, opposed the heretics, and was instrumental in bringing about the conversion of St. Augustine. He composed many hymns, promoted sacred chant, and took a great interest in the Liturgy.