This classic work, On The Trinity, was translated into several languages and played an important role in the spreading of the ideals of Eastern and Western Christianity. Augustine of Hippo, also known as Augustine, Saint 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. In the Catholic Church and the Anglican Communion, he is a saint and pre-eminent Doctor of the Church, and the patron of the Augustinian religious order; his memorial is celebrated 28 August, the day of his death. He is the patron saint of brewers, printers, theologians, the alleviation of sore eyes, and a number of cities and dioceses. Many Protestants, especially Calvinists, consider him to be one of the theological fathers of Reformation due to his teaching on salvation and divine grace. In the Eastern Orthodox Church he is blessed, and his feast day is celebrated on June 15th. Among the Orthodox, he is called “Blessed Augustine”, or “St. Augustine the Blessed.”