From Wikipedia:

Aurelius Ambrosius, better known in English as Saint Ambrose (c. 340 – 4 April 397), was a bishop of Milan who became one of the most influential ecclesiastical figures of the 4th century. He was consular prefect of Liguria and Emilia, headquartered in Milan, before being made bishop of Milan by popular acclamation in 374. Ambrose was a staunch opponent of Arianism, and has been accused of fostering persecutions of Arians, Jews, and pagans.

Traditionally, Ambrose is credited with promoting "antiphonal chant", a style of chanting in which one side of the choir responds alternately to the other, as well as with composing Veni redemptor gentium, a Christmas hymn.

Ambrose was one of the four original doctors of the Church, and is the patron saint of Milan. He is notable for his influence on St. Augustine.

Early life

Ambrose was born into a Roman Christian family about 340 AD and was raised in Trier. His father was Aurelius Ambrosius, the praetorian prefect of Gaul;[1][page needed] his mother was a woman of intellect and piety. Ambrose's siblings, Satyrus (who is the subject of Ambrose's De excessu fratris Satyri) and Marcellina, are also venerated as saints. There is a legend that as an infant, a swarm of bees settled on his face while he lay in his cradle, leaving behind a drop of honey. His father considered this a sign of his future eloquence and honeyed tongue. For this reason, bees and beehives often appear in the saint's symbology.

After the early death of his father, Ambrose followed his father's career. He was educated in Rome, studying literature, law, and rhetoric. Praetorian prefect Probus first gave him a place in the council and then in about 372 made him consular prefect or "Governor" of Liguria and Emilia, with headquarters at Milan, which was then (beside Rome) the second capital in Italy.

Ambrose was the Governor of Aemilia-Liguria in northern Italy until 374 when he became the Bishop of Milan. He was a very popular political figure, and since he was the Governor in the effective capital in the Roman West, he was a recognizable figure in the court of the Emperor Valentinian I. Ambrose never married.