Klee married the pianist Lily Stumpf in 1906. They went to live in Munich. In 1906 he had his first major exhibition. Besides his painting, Klee taught art at the Bauhaus from 1920 to 1931. and later at the Dusseldorf Academy. When the Nazis came to power in Germany, life became very hard for modern artists. Klee moved back to Switzerland in 1933. He died in Muralto, Switzerland in 1940. For many years he had suffered from scleroderma, an autoimmune disease.