The Arch of Constantine (Italian: Arco di Costantino) is a triumphal arch in Rome, situated between the Colosseum and the Palatine Hill. It was erected to commemorate Constantine I‘s victory over Maxentius at the Battle of Milvian Bridge on October 28, 312. Dedicated in 315, it is the latest of the existing triumphal arches in Rome, from which it differs by spolia, the extensive re-use of parts of earlier buildings.
The Capitoline Hill (pronounced /ˈkæpɨtəlaɪn/ or /kəˈpɪtɵlaɪn/; Latin: Collis Capitōlīnus), between the Forum and the Campus Martius, is one of the seven hills of Rome. By the 16th century, Capitolinus had become Campidoglio in Italian. The English word capitol derives from Capitoline. The Capitoline contains few ancient ground-level ruins, as they are almost entirely covered up by Medieval and Renaissance palaces (now housing the Capitoline Museums) that surround a piazza, a significant urban plan designed by Michelangelo.