Underground Rome: Case Romane Del Celio

According to tradition, the site was the residence of the fourth-century martyrs John and Paul who were buried in their house following their execution. The complex features the remains of several Roman houses of different periods, including an insula, or apartment block, and a wealthy domus later converted into an early Christian church. 
Many of the rooms are decorated with frescoes and the site also includes a state-of-the-art museum room containing Roman amphorae, pots and ancient Roman bricks complete with their imprinted stamps.

The museum, which opened in 2002, is located on Clivo di Scauro, an arched street between the Basilica di S. Gregorio and Villa Celimontana, not far from the Colosseum.

It is open every day except Tuesday and Thursday and can be visited from 10.00-16.00. For details see website.