Augustinus, also 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, morality, and the nature of God. Augustine's thoughts laid the groundwork for much of Western Christianity and philosophy. Augustine's life was marked by a profound spiritual journey, transitioning from a life of indulgence to one of devout faith. He became the Bishop of Hippo and played a crucial role in shaping Christian doctrine, particularly regarding original sin and divine grace. His ideas continue to resonate in theological discussions today.