[nelox]

One memorable site is the Church of Saint Clement (Basilica San Clemente). What makes it remarkable are excavations which have revealed so much more than the 12th century church on ground level. Below it is another church from the 4th century. Below that, Roman buildings from the 1st century. So much history on one small site, descending through various stages human settlement below. Giving a taste of what has been repeated over much of the city for millennia.