Ambrose (338-397)

"Ambrose of Milan (born Aurelius Ambrosius; c. 340 – 397), venerated as Saint Ambrose,[a] was the Bishop of Milan, a theologian, and one of the most influential ecclesiastical figures of the 4th century.

Ambrose was serving as the Roman governor of Aemilia-Liguria in Milan when he was unexpectedly made Bishop of Milan in 374 by popular acclamation. As bishop, he took a firm position against Arianism and attempted to mediate the conflict between the emperor Theodosius I and the usurper Magnus Maximus. Tradition credits Ambrose 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, an Advent hymn. He also had notable influence on Augustine of Hippo (354-430)." - (en.wikipedia.org 20.06.2021)