This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

A small cell adjacent to this church was once the bedroom for a renowned saint.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This small church was constructed over the ruins of three temples dating to the Roman Republic.

This is the oldest Roman-made bridge in the city still existing in its original state.

This curious, round temple is the oldest still-standing marble building in Rome.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.