412

Year 412 was a leap year starting on Monday of the Julian calendar. At the time, it was known in Europe as the Year of the Consulship of Honorius and Theodosius. The denomination 412 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

The Visigoths, led by King Ataulf, move into the south of Gaul. He establishes his residence at Narbonne, and makes an alliance with Emperor Honorius, against the usurper Jovinus.
Emperor Jovinus elevates his brother Sebastianus as co-emperor and takes control of Gaul.
Heraclianus, governor, revolts against Honorius and proclaims himself Augustus. He interrupts the grain supply to [the city of Rome|grain supply to Rome]. Honorius condemns him and his supporters to death with an edict at Ravenna.
The Theodosian Walls are constructed at Constantinople during the reign of emperor Theodosius II. The work is carried out under supervision of Anthemius, notable praetorian prefect of the East.
Winter - Olympiodorus, historical writer, is sent on an embassy by Honorius, and sails in stormy weather around Greece up the Black Sea, to meet the Huns who are located on the middle Danube.

The forts on the west bank of the Danube, which were destroyed by the Huns, are rebuilt, and a new Danubian fleet is launched.

An edict of Honorius outlaws Donatism.
Cyril of Alexandria becomes Patriarch of Alexandria.
Lazarus, bishop of Aix-en-Provence, and Heros, bishop of Arles, are expelled from their sees on a charge of Manichaeism.
Fa-Hien, Chinese Buddhist monk, spends 2 years in Ceylon and is more than 200 days at sea as storms drive his ship off its course, but returns with sacred Buddhist texts back to China.