Wallraf-Richartz-Museum

One of Germany's finest art museums, the Wallraf-Richartz (wallraf.museum; adult/concession €13/9) presents a primo collection of European art from the 13th to the 19th centuries in a minimalist cube designed by the late OM Ungers. All the marquee names are here – Rubens and Rembrandt to Manet and Monet – along with a prized sampling of medieval art, most famously Stefan Lochner's Madonna in Rose Bower, nicknamed the "Mona Lisa of Cologne." Just a heads-up: the museum is set to close for at least two years of renovations starting in mid-2026.