Events

• November 20 - Diocletian becomes Emperor of Rome
• Patriarch Rufinus I succeeds Patriarch Dometius as Patriarch of Constantinople
• Year 1 of the Coptic calendar (or 285)
• The Bagaudae revolt against the Roman Empire in Gaul.

Births

Deaths

• November - Numerian, Roman emperor
• Diophantus, Greek mathematician (approximate date)