Augustinism

Augustine of Hippo
Bishop of Hippo Regius
Painting by Justus van Gent, circa 1474
Diocese	Hippo Regius
Appointed	395
Installed	396
Term ended	430
Orders
Ordination	391
Consecration	395
Personal details
Birth name	Aurelius Augustinus
Born	(354-11-13)13 November 354 Thagaste, Numidia (modern-day Souk Ahras, Algeria)
Died	28 August 430(430-08-28) (aged 75) Hippo Regius, Numidia (within modern-day Annaba, Algeria)
Buried	San Pietro in Ciel d'Oro, Pavia, Italy
Denomination	Nicene Christianity
Sainthood
Feast day	28 August (Western) 15 June (Eastern) 4 November (Assyrian)
Venerated in	All Christian denominations which venerate saints
Title as Saint	Bishop, philosopher, theologian, Doctor of the Church (Doctor of Grace), and Church Father
Canonized	Pre-Congregation
Attributes	Child; dove; pen; shell, pierced heart, holding book with a small church, bishop's staff, miter
Patronage	Brewers; printers; theologians; Bridgeport, Connecticut; Cagayan de Oro, Philippines; San Agustin, Isabela
Shrines	San Pietro in Ciel d'Oro, Pavia, Italy

Augustine of Hippo (/ɔːˈɡʌstᵻn/; 13 November 354 – 28 August 430) was an early Christian theologian and philosopher whose writings influenced the development of Western Christianity and Western philosophy. He was the bishop of Hippo Regius (within modern-day Annaba, Algeria), located in Numidia (Roman province of Africa). Augustine is viewed as one of the most important Church Fathers in Western Christianity for his writings in the Patristic Era. Among his most important works are The City of God and Confessions.

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. After his baptism and conversion to Christianity in 386, Augustine developed his own approach to philosophy and theology, accommodating a variety of methods and perspectives. Believing that the grace of Christ was indispensable to human freedom, he helped formulate the doctrine of original sin and made seminal contributions to the development of just war theory. When the Western Roman Empire began to disintegrate, Augustine developed the concept of the Church as a spiritual City of God, distinct from the material Earthly City. His thoughts profoundly influenced the medieval worldview. The segment of the Church that adhered to the concept of the Trinity as defined by the Council of Nicaea and the Council of Constantinople closely identified with Augustine's On the Trinity.