Construction began on the northern side of the forum under the emperor Maxentius in 308 AD, and was completed in 312 by Constantine I after his defeat of Maxentius at the Battle of the Milvian Bridge.
The construction of the northern section of the forum started during the reign of Emperor Maxentius in 308 AD. It was completed two years later, in 312, under the rule of Constantine I after he emerged victorious from his conflict with Maxentius at the Battle of the Milvian Bridge.