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This fabulous museum houses the collection amassed by postwar curator Willem Sandberg. Displays rotate but you'll see an amazing selection featuring works by Picasso, Matisse, Mondrian, Van Gogh, Rothko, De Kooning, Warhol and more, plus an exuberant Karel Appel mural and great temporary exhibitions. The building was originally a bank, built in 1895 to a neo-Renaissance design by AM Weissman, and the modern extension is nicknamed 'the bathtub' for reasons that will be obvious when you see it.
There's a family zone with activities for kids. Unlike other museums in the area, you seldom have to queue. There are regular guided tours or you can take the free audio tour. Museumkaart and I Amsterdam Card holders get in free.