Paintings from the 12th to 19th centuries and some 100 works by the Russian expressionist Alexei Jawlensky (1864–1941), who lived in Wiesbaden for the last 20 years of his life, are highlights of Wiesbaden’s art museum, along with late-20th-century installations, objects, sculptures and paintings, and a natural sciences section featuring geological, mineral and botanical exhibits. Don't miss the dazzling gilded hall mosaic dating from just before WWI.