331

Year 331 was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Bassus and Ablabius. The denomination 331 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Events

Emperor Constantine the Great vigorously promotes Christianity, confiscating the property and valuables of a number of pagan temples throughout the Roman Empire.
Constantine I dedicates the Church of the Holy Apostles in Constantinople.
Constantine I promulgates a law against divorce.
Asia
Gogugwon becomes ruler of the Korean kingdom of Goguryeo.
By topic

Eusebius of Caesarea writes the Onomasticon.
Religion
The Fifty Bibles of Constantine are commissioned for use in Constantinople.
Gregory the Illuminator withdraws to a small sanctuary in the Daranali province.