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

A massive marble foot is tucked away in a small alley near the Pantheon.

A fortified medieval basilica on the Caelian Hill preserves extraordinary frescoes and one of Rome's most beautiful hidden cloisters.

Rome's first modern graffito is all that is left of a peaceful protest from the 1970s.

Roman politician Herodes Atticus built this nymphaeum to honor his wife, whom he may have murdered.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

Its interior is adorned with some of the best examples of early Christian mosaics.

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

The ruins of an abbey believed to have been founded by Charlemagne in the 9th century.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

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

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

The first Russian Orthodox church in the Catholic city of Rome in almost a thousand years.

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

A burial vault located under Tiber Island in the middle of the Italian capital.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.