A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

Graffiti covers the walls of a room where university students through the centuries have waited nervously to defend their theses.

A massive explosion that leveled hundreds of buildings in the city of Leiden is remembered by a waterside plaque.

One of the great math minds of the 17th century is underfoot in this 900 year old Dutch church.

One of the Leiden's oldest pubs is also the birthplace of the Heineken star.

Science meets wall art to highlight the beauty of famous mathematical equations.

A former plague hospital turned medical museum.

One of the oldest masonic temples in the Netherlands, built in 1757.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

The remains of a medieval wall discovered in the basement of a jewelry store.

A trio of red, white, and blue stones embedded in the streets of Leiden are markers of medieval territory and law.

This small museum collects the Christian remembrances which would otherwise be forgotten.

Once housed in the towers of this Gothic church, this 17th century clock still ticks today.