Rome is a city of historical layers. On top you have the grand and ornate Baroque Rome interspersed with the soft and tranquil Renaissance Rome (with some modern and Fascist architecture sprinkled throughout). These top layers sit above the Medieval layer, which sits on top of Rome’s ancient core. Each passing millennia was built on the foundations of the previous. You will notice in Rome that the older the building, the more recessed it is on the ground.