The Swiss painter Paul Klee (1879-1940) was a prominent figure in the 20th century avant-garde art movement. He is known for his unique style of painting, which combined elements of Expressionism, Cubism, and Surrealism. His works often featured bright colors and whimsical shapes, and he was also a prolific printmaker. Klee's work has been widely exhibited and collected, and he is considered one of the most influential modern artists.