The Catacombs of Rome are comprised of 40 separate underground areas spread through a large vicinity across the area of Rome. To the surprise of many people, the catacombs were not only used for the Christian religion but for all residents during Ancient times going back to Etruscan times. During the Roman imperial time, it became "fashionable" to follow the earlier Etruscan traditions and bury the dead rather than continue with creminations of earlier Roman people. The Christian catacombs are an extremely important area in terms for art history as they contain paintings from 400 AD.

This small Basilica of Rome located behind the Colosseum uniquely has 2 underground levels, the lowest dating back to the Republican era of 509-27BC and the middle level is believed to be from 392. The Basilica dedicated to Pope Clement first is a real history filled gem of modern day Rome.