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

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

For more than a century, this hole-in-the-wall near Termini Station has been serving what some say is the greatest porchetta sandwich.

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

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

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

Ancient ruins hidden underneath a modern luxury hotel.

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

Architectural monsters are devouring this palace's every door and window.

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

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

This unassuming bridge is most likely one of Michelangelo's unfinished masterworks.

The Pope’s secret escape route.

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

A small but very fascinating fountain in the center of Rome with four books and a deer carved.

An 18th-century post box used to alert the church of sick and ailing foreign pilgrims.

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

This statue is the only female representation of Rome's "talking statues."

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

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

This Roman amphitheatre was also the location of the first gladiator school.