Inside the Museum Quarter complex, the sleek white Leopold Museum boasts the world’s largest collection of work by expressionist Egon Schiele, as well as important pieces by Gustav Klimt, Oskar Kokoschka and other major Austrian artists from the 19th and 20th centuries. The architecture of the Leopold Museum, a light-filled cube of white shell limestone, stands in striking contrast to the historic ambience of the Imperial Stables.Tip: The museum’s panorama windows offer a wonderful view of central Vienna and the Hofburg Palace.