Basilica of San Clemente

Basilica di San Clemente al Laterano

Stairs down to a medieval church, Roman street, Mithraeum

⚠ Book the underground online

Hours

Mon–Sat 09:00–12:30 and 14:00–18:00; Sun and holidays 12:00–18:00

Tickets

Excavations €10, students €5, upper church free

Address

Via Labicana 95, a few minutes from the Colosseum

The upper church dates to the 12th century. Take the stairs down and you reach a 4th-century church, and further down a Roman alley and building walls. In the dark room at the bottom stands a Mithraic altar, still intact. Every level is another era, and somewhere the sound of running water never stops. The upper church is free; only the excavations need a ticket. There are lots of stairs and low light, which matters if you dislike tight spaces.