Wallraf-Richartz-Museum

A famous collection of paintings from the 13th to the 19th centuries, the Wallraf-Richartz-Museum occupies a postmodern cube designed by the late OM Ungers. Works are presented chronologically, with the oldest on the 1st floor where standouts include brilliant examples from the Cologne School, known for its distinctive use of colour. Upstairs are Dutch and Flemish artists, including Rembrandt and Rubens, Italians such as Canaletto and Spaniards such as Murillo. The 3rd floor focuses on the 19th century, with evocative works by Caspar David Friedrich and Lovis Corinth. Thanks to a permanent loan from Swiss collector Gérard Corboud, there's also a respectable collection of impressionist paintings, including canvases by Monet and Cézanne.