The Kunstmuseum Mülheim an der Ruhr unites three collections under its roof. With its focus on paintings and prints, the Städtische Sammlung (City Collection) is exemplary at showing the development of art in the twentieth and twenty-first centuries. It goes from classic modernism to the constructivist, art informel forms of the post-war era, all the way to contemporary positions. Thanks to a gift from the Mülheim physician Dr. Karl Gotthelf Themel, the Kunstmuseum also has the largest collection of Heinrich Zille’s works outside of Berlin. The first-rate Sammlung Ziegler (Ziegler Collection) concentrates on German expressionism, and contains paintings and works on paper by Franz Marc, August Macke, and Emil Nolde, as well as the “Bauhaus” artists Paul Klee and Lyonel Feininger.