425

By Place

Western Roman Empire

• October 23 — Valentinian III becomes Western Roman Emperor.
• Aëtius leads an army into Italy to support the self-proclaimed emperor Joannes.

Eastern Roman Empire

• The Sanhedrin is disbanded by the Roman Empire.

By Topic

Arts and Sciences

• Last known usage of Demotic.

Religion

• Buddhism begins to spread to Southeast Asia.

Births

• Zu Chongzhi, Chinese mathematician

Deaths

• October 10 — Atticus, Patriarch of Constantinople
• Joannes, usurper in the Western Roman Empire
• Flavius Castinus, Roman politician
• Gamliel VI, the last nasi (head of the Sanhedrin)
• Helian Bobo