Aurelius Augustinus, commonly known as Saint Augustine, was a prominent early Christian theologian and philosopher born in 354 AD in Thagaste, 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 groundwork for much of Western Christianity and philosophy. Augustine served as the Bishop of Hippo from 396 AD until his death in 430 AD. His writings addressed various issues, such as the relationship between faith and reason, the problem of evil, and the importance of divine grace. His ideas continue to shape Christian doctrine and Western thought today.