For the book see 253 (book).

Years: 249 250 251 252 - 253 - 254 255 256 257

Decades: 220s 230s 240s - 250s - 260s 270s 280s

Centuries: 2nd century - 3rd century - 4th century

Events

• Pope Lucius I succeeds Pope Cornelius.
• Aemilianus becomes Roman emperor.
• Valerian I becomes Roman emperor. He appoints his son Gallienus as his junior colleague.

Births

Deaths

• Pope Cornelius
• Aemilianus, Roman emperor
• Trebonianus Gallus, Roman emperor
• Saint Babylas, Patriarch of Antioch