Arch of Constantine

The Arch of Constantine stands beside the Colosseum, its three broad bays framed by columns and rich marble cladding. The Senate ordered it in 312 after Constantine’s victory at the Milvian Bridge, and it was finished three years later. Brick and concrete form the core, then covered with panels and statues taken from earlier monuments. Much of the sculptural decoration comes from arches of Trajan, Hadrian and Marcus Aurelius, their portrait heads recarved to show Constantine. Art historians still debate whether the arch was newly built or adapted from an earlier structure. The mixture of styles—some panels smooth and classical, others stiff and late Roman—makes it a key example of fourth-century change. Visitors find a massive archway crossing the ancient triumphal route. The central passage is tall enough for a full procession, while side bays frame distant views of the Palatine Hill. The marble surfaces catch light at different times of day, and the reused reliefs show emperors hunting, sacrificing and addressing crowds.