Definition
Saint Ambrose (c. 340-397 AD) was a prominent bishop of Milan, theologian, and one of the four original Doctors of the Church. He was a key figure in the 4th-century church. Ambrose is known for his influential writings, hymns, and role in converting Saint Augustine to Christianity. He stood up to imperial power and defended the church's independence. His feast day is celebrated on December 7th. He remains an important figure in Christian history.