Aurelius Augustinus , Augustine of Hippo , or Saint Augustine ( November 13 , 354 A.D. â `` August 28 , 430 A.D. ) was a philosopher , theologian , and was bishop of the North African city of Hippo Regius for the last part of his life . Augustine is one of the most important figures in the development of Western Christianity , and is considered to be one of the church fathers . Augustine of Hippo ( November 13 , 354 â `` August 28 , 430 ) , 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 ) .