Events relating to athens
Constantine's new churches in Rome introduce an important element in church architecture, the transept
Constantine convenes a council of 200 bishops at Nicaea to discuss the beliefs of Arius, which are deemed to be heresy
Helena, mother of the emperor Constantine, discovers in Jerusalem the cross on which Christ died - or so it is later claimed

Constantine's new Christian city on the site of Byzantium is inaugurated, as Constantinople

Constantine is at last baptized a Christian in Nicomedia, just a few days before his death
Frumentius, brought to Ethiopia as a slave, becomes the kingdom's first Christian bishop
Greece begins to find a new and influential role in a Christian context, through the Byzantine empire
The Christian missionary Ulfilas devises an alphabet for the language of the Goths, so that he can translate the Bible into Gothic
St Martin founds the first monastery in western Europe, at Ligugé near Poitiers
Julian, the new emperor in Constantinople, plans to reinstate the pagan cult of the ancient Roman empire
An apocryphal story states that Julian the Apostate, dying at Tarsus, acknowledges the victory of the Galilean, Jesus Christ
A document is distributed by the bishop of Alexandria, formally establishing the contents of the New Testament
Kalidasa, the most distinguished of India's authors in classical Sanskrit, is at the Gupta court in Patna
The Codex Sinaiticus, the earliest surviving manuscript of the complete New Testament, is copied out - probably in Egypt
St Jerome settles in Bethlehem, where his holy women organize a monastery for his residence and a nearby convent for themselves
St Ambrose asserts the authority of the church, refusing communion to the emperor Theodosius in Milan until he does penance for a massacre
St Augustine reveals that as a young man, studying and teaching in Carthage, he often prayed for 'chastity and continence, but not yet'
St Jerome, in Bethlehem, completes the Latin translation of the Bible which later becomes known as the Vulgate
The Burgundians cross the Rhine and settle round Worms, before moving south to the Savoy region
Prompted by the fall of Rome to the Visigoths, St Augustine undertakes a great work of Christian philosophy, the City of God
A council is convened at Ephesus to consider the theology of Nestorius, which is judged to be heretical
Gaiseric captures Carthage and makes it his base for Vandal raids across the Mediterranean
St Patrick creates a strong tradition of Celtic Christianity in Ireland, from his base in Armagh
Attila and the Huns invade Gaul but are defeated, somewhere near Troyes, by a Roman army supported by Visigoths and Burgundians

The Syrian desert is full of hermits living on pillars, following the example of St Simeon Stylites