Events

By place

Roman Empire

• September – Gallienus, aided by Aurelian, defeats the Goths at the Battle of Naissus.
• Gallienus is killed by his troops outside Milan.
• Claudius II becomes Emperor.
• The Alamanni invade Italy.
• November – Claudius II defeats the Alamanni at the Battle of Lake Benacus.
• The Visigoths first appear as a distinct people.

Europe

• Victorinus becomes the fourth Emperor of the Gallic Empire, following the murders of his predecessors.

Births

Deaths

• September—Gallienus, Roman Emperor
• December 26—Pope Dionysius
• Postumus, ruler of the Gallic Empire (killed by army)
• Laelianus, ruler of the Gallic Empire (killed by army)
• Marcus Aurelius Marius, ruler of the Gallic Empire (killed by army)
• Empress Dowager Wang Yuanji, wife of Sima Zhao