Ambrose was born in Trier (now in Germany) between 337 and 340, to a Roman family: his father was praetorian prefect of Gaul. Ambrose was educated at Rome and embarked on the standard cursus honorum of Roman advocates and administrators, at Sirmium, the capital of Illyria. Ambrose was a key figure in the conversion of St Augustine to Catholicism, impressing Augustine (hitherto unimpressed by the Catholics he had met) by his intelligence and scholarship. He died on Holy Saturday, 4 April 397.