Located inside the former Frauenbad (Women’s Bathhouse) near the tram terminus, this interesting museum showcases the work of its namesake Arnulf Rainer, who was born in Baden in 1929 and studied for one day at the School of Applied Arts in Vienna. He also went to the Academy of the Fine Arts but left after three days, only to return as a respected artist and become a professor there. He began painting in a surrealist style before developing his characteristic multimedia works, some of them (like painting with chimpanzees) idiosyncratic and bizarre. The museum has retained the delightful marble features of the Biedermeier bathhouse from 1815, making it all the more worth a visit. Exhibitions change twice a year.