Museum Wiesbaden is a two-branch museum of art and natural history in the Hessian capital of Wiesbaden, Germany. The museum’s exhibits range from natural history objects to contemporary art. Its collections of Old Masters, 19th Century and Art Nouveau, Classic Modernism, Contemporary Art and Modernism on the one hand, and the Natural History Collections on the other hand, are connected in a “round trip” tour uniting the aesthetic experience of both its art and natural history exhibits. The museum owns an important collection of the work of Alexej von Jawlensky. Since June 2019, Museum Wiesbaden displays the Art Nouveau collection of Ferdinand Wolfgang Neess as a permanent exhibition in its southern wing. Its more than 570 objects provide a cross section of all Art Nouveau genres, including prime examples of the quality and stylistic virtuosity boasted by late 19th-century art. Along with the Frankfurt Museum of Modern Art, it is one of the most important museums for Modernism in Hessen.