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. 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 for salvation and the role of the Church in guiding believers. His thoughts on original sin and free will continue to be discussed in theological circles today.