List of 312 Major News Events in History, Most Important Historical Events in 312
| Date | Event |
|---|---|
| October 27, 312 | Constantine is said to have received his famous Vision of the Cross. |
| October 28, 312 | Constantine I defeats Maxentius, becoming the sole Roman emperor in the West. |
| October 29, 312 | Constantine the Great enters Rome after his victory at the Battle of the Milvian Bridge, stages a grand adventus in the city, and is met with popular jubilation. Maxentius' body is fished out of the Tiber and beheaded. |