Museo della Forma Urbis

The Museo della Forma Urbis is one of Rome's newest museums, opened in January 2024 on the Caelian Hill just steps from the Colosseum. It houses something genuinely extraordinary: the surviving fragments of a colossal marble map of ancient Rome, carved between AD 203 and 211 under Emperor Septimius Severus. The original map measured roughly 18 by 13 metres and was mounted on the wall of the Templum Pacis — only about a tenth of it survives, but even these fragments provide an unparalleled window into the urban fabric of ancient Rome. The museum's design is clever: the marble fragments are laid out on the floor over a reproduction of Giovanni Battista Nolli's famous 1748 map of Rome, letting you see ancient and 18th-century Rome superimposed. The building itself, a repurposed Fascist-era gymnasium on the Caelian Hill, sits within the new Parco Archeologico del Celio, which includes archaeological remains from Republican through medieval Rome. This is a specialist museum — not a blockbuster destination. But for anyone interested in Roman urbanism, cartography, or archaeology, it's a remarkable place. It's also blissfully uncrowded compared to its neighbour down the hill.