Museum Wiesbaden is the state museum of art and nature in the capital of Hesse. The exhibits of the two-division house are divided on the one hand into the Art Collections Old Masters, 19th Century and Art Nouveau, Classical Modern Art, Contemporary Art and Modern Art and on the other hand the Natural History Collections with the permanent exhibition "Aesthetics of Nature".

The museum owns the internationally most important collection of the work of Alexej von Jawlensky. Since June 2019, the Museum Wiesbaden shows the Jugendstil and Art Nouveau collection of Ferdinand Wolfgang Neess as a permanent presentation. With over 500 objects, it encompasses all genres of Jugendstil and Art Nouveau from furniture to glass, ceramics, lamps and silver to paintings and sculptures.