Explore the most impressive ones of many underground buildings of Rome and literally "get in touch" with the unique architectural stratification of this city. Only at San Clemente is it possible to see first-hand the layers of almost 20 centuries of history in the ground itself. The monument is the result of three superimposed buildings, erected one on top of the other: 11 meters underground lie two Roman buildings dating from the 1st century A.D., subsequently transformed into a Mithraic temple; above it, an early Christian basilica was built in the 4th c. A.D.; and then the Medieval church, still in use today, was erected in 1108. Our tour continues with the complex of a Roman house below the church of S.S.Giovanni e Paolo. The patrician house, dated back to the 3rd and 4th centuries A.D., consisted in many rooms and an indoor garden. Recently restored and open to the public, the house offers a fascinating tour through the depth of an ancient city. Please note: dress code to enter churches requires covered shoulders and knees. Not on Sunday morning (St.Clement's excavations closed), not on Tue nor Wed (Houses of S.S. John and Paul closed). The tour price doesn't include transport nor entrance tickets (St. Clement's entrance fee is EU 5 per person, the Houses of S.S. John and Paul's entrance fee is EU 6 per person).