According to tradition, the apostles John and Paul lived in these subterranean houses beneath the Basilica di SS Giovanni e Paolo before they were beheaded by the emperor Julian. There's actually no direct evidence for this, although research has revealed that the houses were used for Christian worship. There are more than 20 rooms, many of them richly decorated.
Entry is to the side of the basilica on the Clivo di Scauro.
