Hundreds of lucky felines haunt the ruins where Caesar was murdered.

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

A study of Fascist era Art Deco design in Italy.

An abandoned shopping gallery built during Fascist Italy tucked in the center of Palermo.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Every inch of this chapel is covered in craftsmanship from across the world.

A medieval wash house where people washed clothes in a river allegedly formed by the tears of a mourning nymph.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

An eerie collection of the surviving structures from a past celebration of the future.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Baroque celebration of the end of the Great Plague of Vienna.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Apartment complexes built into huge repurposed natural gas tanks.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.