Basilica dei Santi Cosma e Damiano
- Via dei Fori Imperiali, 1
The basilica is of the first churches built atop ancient buildings, in this case the Forum of Vespasian and the Temple of Romulus, both still visible. The apse contains an important 6th-century mosaic depicting Saints Peter and Paul Presenting Cosmas, Damian, Theodorus, and Pope Felix IV to Christ, while the apostles are portrayed as sheep. The 18th-century Nativity, which sets the scene in Rome, is worth a look.