Religion April 4 – Ambrose, Archbishop of Milan, dies in his diocese after 23 years in office, during which he dominated the political life of the Roman Empire. August 28 – Council of Carthage: The biblical canon is definitely declared. September 7 – First Council of Toledo: Hispanic bishops, including Lampius, condemn Priscillianism. November 13 – John Chrysostom is appointed Archbishop of Constantinople. Mor Gabriel Monastery is founded and located on the Tur Abdin plateau near Midyat (Turkey). Sulpicius Severus writes the earliest biography of Martin of Tours, the first known "life of a saint" ever written. Augustine of Hippo begins his Confessions, an autobiography that recounts his intellectual and spiritual development. Scottish missionary Ninian establishes a church (Candida Casa) at Whithorn, and begins his work among the Picts.
Religion April 4 – Ambrose, Archbishop of Milan, dies in his diocese after 23 years in office during which he dominated the political life of the Roman Empire. August 28 – Council of Carthage: The biblical canon is definitely declared. September 7 – First Council of Toledo: Hispanic bishops, including Lampius, condemn Priscillianism. November 13 – John Chrysostom is appointed Archbishop of Constantinople. Mor Gabriel Monastery is founded and located on the Tur Abdin plateau near Midyat (Turkey). Sulpicius Severus writes the earliest biography of Martin of Tours, the first known "life of a saint" ever writt,en. Augustine of Hippo begins his Confessions, an autobiography that recounts his intellectual and spiritual development. Scottish missionary Ninian establishes a church (Candida Casa) at Whithorn, and begins his work among the Picts.