Explorer Cologne

Museum Ludwig is an art museum in Cologne housing modern and contemporary art, including one of Europe's largest Picasso collections and extensive holdings of Pop Art by Andy Warhol and Roy Lichtenstein. It occupies a distinctive building with an undulating roof next to Cologne Cathedral, completed in 1986.

The NS Documentation Center of the City of Cologne is a museum on National Socialism housed in the EL-DE Haus, the former regional Gestapo headquarters. Built in the 1930s as commercial premises, the building's basement held prison cells where detainees' wall inscriptions can still be seen; the museum opened in 1988.

The Romano-Germanic Museum is an archaeological museum in Cologne dedicated to the Roman city of Colonia Claudia Ara Agrippinensium, on which modern Cologne stands. Its collection includes the Dionysus mosaic preserved on its original site and one of the world's largest collections of Roman glass. While its building on Roncalliplatz is closed for renovation, a selection of the collection is shown at the Belgian House on Cäcilienstraße.

The Chocolate Museum Cologne opened in 1993 on the Rheinauhafen peninsula, founded by chocolatier Hans Imhoff. Exhibits trace the history of chocolate from the Olmec, Maya and Aztec civilizations to modern manufacturing, with a glass production line showing each step of making chocolate.