Hippo Regius was an ancient city located in present-day Algeria, near the Mediterranean coast. It was founded by the Phoenicians and later became an important center for Roman trade and culture. The city is best known for its association with Saint Augustine, a prominent Christian theologian who served as its bishop in the 4th and 5th centuries. Today, the ruins of Hippo Regius can be explored, showcasing remnants of its Roman past, including a basilica, baths, and a theater. The site is significant for understanding the history of early Christianity and the influence of the Roman Empire in North Africa.