The remains of this 2nd-century Roman temple are incorporated into a modern building.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

A sculpture serving as an homage to Pope John Paul II.

This ancient market is often referred to as the oldest shopping mall in the world.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

This ancient Roman arch misled treasure hunters for centuries.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

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

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

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.

The mystic whose incorrupt corpse still attracts the faithful.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

If you want to talk to the Pope you will have to stare down this surreal vision of Jesus rising from a nuclear hell.

An unremarkable wooden wheel built into the side of one of Rome's oldest hospitals was part of a policy to reduce infant exposure.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

The Italian revolutionary's legendary wife is portrayed on horseback waving a gun and holding her child in this memorial on the Janiculum.