The document discusses three 20th century art movements: Impressionism, Expressionism, and Neoclassicism. It provides details on Impressionism in painting and music, describing their emphasis on atmosphere, light, and suggestion over emotion or narrative. Expressionism is defined by its subjective perspective and use in different art forms to express inner experiences. Neoclassicism was a reaction against late Romanticism, seeking order and restraint through forms and styles inspired by 18th century Classical music. Key figures discussed are Debussy, Ravel, Schoenberg, Webern, Berg, Stravinsky, and Hindemith.