Events

• July 25 - Constantine I proclaimed Roman Emperor by his troops.
• October 28 - Maxentius, son of the former Roman Emperor Maximian proclaimed Emperor.
• Flavius Valerius Severus is proclaimed Augustus.
• The Council of Elvira declares killing through a spell a sin and the work of the devil.
• Santa Maria Maior de Lisboa is built in Lisbon.
• The Tomb of Galerius is built in Thessaloniki.
• The War of the Eight Princes ends in China.
• Saint Metrophanes becomes bishop of Byzantium.

Births

• Ephrem the Syrian, Christian saint and prolific hymn writer, in Nisibis, Mesopotamia (approximate date)

Deaths

• Constantius Chlorus, the father of Constantine I, in York