Saint 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 thoughts laid the foundation for much of Western Christianity and philosophy. He served as the Bishop of Hippo from 396 AD until his death in 430 AD. Augustine's teachings emphasized the importance of divine grace and the role of the Church in salvation. His ideas continue to be studied and debated in both religious and philosophical contexts today.