St. Augustine, one of the Christian thinkers after St. Paul was born November 13, 354 and was the bishop of Hippo from 396 to 430. His Christian teaching created a theological system of great power and lasting influence. He had numerous written works, the most important of which are Confessions (c. 400) and The City of God (c. 413–426). In Roman Catholicism he is formally recognized as a doctor of the church.