Three layers of history stacked vertically: a 12th-century basilica, a 4th-century church below it and a 1st-century Roman house and Mithraic temple at the bottom, with running…
A fortified medieval convent with a quiet Cosmatesque cloister and the Oratory of San Silvestro, whose 1246 frescoes tell the Constantine legend. Tourists walk past it between…
A 5th-century circular church ringed with 16th-century frescoes of martyrdoms, graphic enough to be startling. It sits on a quiet street on the Celio away from the main circuits.
Roman houses under Santi Giovanni e Paolo; 40 min if open.
Some 20 rooms of Roman houses under the Basilica of Santi Giovanni e Paolo, with painted walls from the 2nd to 4th centuries. It is less known than the Colosseum 5 minutes away.
