→Nicene era (325-451)
*325 [[First Ecumenical Council]] held in Nicea, condemning [[Arianism]], setting the [[Paschalion]], and issuing the first version of the [[Nicene Creed]].
*326 Discovery of the [[True Cross]] by the Empress St. [[Helen]]a.
*328 [[Athanasius the Great]] becomes bishop of Alexandria.
*329 St. [[Athanasius of Alexandria|Athanasius]] ordains St. [[Frumentius]] (Abba Selama) to the [[priest]]hood and commissions him to apostolic work in Ethiopia.
*330 Amoun and [[Macarius the Great]] found monasteries in the Egyptian desert.
*340 Conversion of [[Wulfila]] to [[Arianism]], subsequently missionizing the Goths with his heretical doctrine.
*348 Death of St. [[Pachomius the Great]].