• June 15 - Licinius issues his own Edict of Toleration, ending persecution of Christians in his own part of the Roman Empire.
• Maxentius reconquers the African provinces from Domitius Alexander[?].
• Luoyang, the Han Dynasty capital of China, was sacked by barbarians.

Births

Deaths

• Jin Huai Di[?], emperor of China
• In May, Galerius, Roman emperor

For the band, see 311 (band).