312
| Years: 308 309 310 311 – 312 – 313 314 315 316 | |
| Decades: 280s 290s 300s – 310s – 320s 330s 340s | |
| Centuries: 3rd century – 4th century – 5th century | |
Events
- October 28 – Battle of Milvian Bridge: Constantine defeats Maxentius in the fight to become emperor of Rome. He also is converted to Christianity.
- Arch of Constantine built in Rome
Births
Deaths
- October 28 – Maxentius, Roman Emperor slain in battle
Categories: 312