Basilica of Maxentius built
312 CE.
Shown on the map at 41.892°, 12.488°.
The Basilica of Maxentius (Italian: Basilica di Massenzio), sometimes known by its original Latin name, Basilica Nova or, less commonly, the Basilica of Constantine (Italian: Basilica Constantini), was a civic basilica in the Roman Forum. At the time of its construction, it was the largest building in the Forum, and the last Roman basilica built in the city.
Text from the Wikipedia article Basilica of Maxentius, licensed CC BY-SA 4.0.