The tour will require 3 hours and it will start with the visit of the Basilica of San Clemente. The building, a three levels structure, is one of the most representative monuments of the history of Rome: the three different archaeological levels go down for 12 metres in a suggestive walk through the History. The first level of the hundergrounds houses a mithreum (roman temple of mithra) and the ruins of some insulae, Roman Houses. Over the centuries on this first layer rose up beautiful buildings, so you will able to admire an amazing medieval church as well. The highlights of this little underground basilica are the Ancient frescos with stories of Saint Clement. In the second part of the tour you will visit the remains of the roman houses of Caelian Hill and the little museum linked to them. An interesting tour for those who want to know about the habits of whealthy citizens of the Roman Empire.