St. Augustine of Hippo was a Christian theologian and philosopher born in 354 AD in present-day Algeria. He is best known for his influential works, including Confessions and The City of God, which explore themes of faith, grace, and the nature of God. Augustine's ideas helped shape Western Christianity and philosophy. Augustine served as the Bishop of Hippo from 396 AD until his death in 430 AD. His teachings emphasized the importance of divine grace and the role of the Church in salvation. He is recognized as a Doctor of the Church and is celebrated as a saint in both the Roman Catholic and Eastern Orthodox traditions.