Next to the Flavian amphitheatre, this monument to Constantine's triumph over the unpopular
Maxentius at the Battle of Milvian Bridge in AD 312 was slapped together using remnants of
earlier buildings within three years.

The inscription reads:
"To the Emperor Caesar Flavius Constantinus, the greatest, pious, and blessed Augustus:
because he, inspired by the divine, and by the greatness of his mind, has delivered the
state from the tyrant and all of his followers at the same time, with his army and just force
of arms, the Senate and People of Rome have dedicated this arch, decorated with triumphs."