Inside this building is another country within Rome, a sovereign entity without a physical territory.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

Rome’s legendary peephole vista is also a former Crusader stronghold.

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

The yawning maw of this pagan visage is said to bite off the hands of liars.

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

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

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

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

A 15th-century monumental Latin inscription on this house celebrates Lorenzo Manilio's love for Rome.

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

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

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

A rare example of a medieval house in Rome adorned with a melancholic inscription.

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

This ancient Roman arch misled treasure hunters for centuries.

This medieval church in Rome was almost destroyed following a terrorist attack in 1993.

Rome is now home to a stunning food museum and library.

An enigmatic modern marker left next to a historic Roman site.

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

This small Roman arch was transformed into a dwelling by the founder of the Trinitarian Order.

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