Augustine of Hippo, also known as Augustine, St. Augustine, St. Austin, St. Augoustinos, Blessed Augustine, or St. Augustine the Blessed, was Bishop of Hippo Regius (present-day Annaba, Algeria). He was a Latin-speaking philosopher and theologian who lived in the Roman Africa Province. His writings were very influential in the development of Western Christianity.
According to his contemporary, Jerome, Augustine �established anew the ancient Faith.� In his early years he was heavily influenced by Manichaeism and afterward by the Neo-Platonism of Plotinus.
This classic work, On Christian Doctrine, was translated into several languages and played an important role in the spreading of the ideals of Eastern and Western Christianity.