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

This hidden alley near the location of Rome's first theater was the site of a curious miracle.

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

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

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

Roman-era ships unearthed...

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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.

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

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

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

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

A Nesting Doll of Churches.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

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

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

A forgotten "city of water" underneath the famous Trevi district.

The final resting place of the poets Shelley and Keats.

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

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

An alchemist's “magic door” stands in the middle of a Roman park.

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

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