Modern classical music is music written in the 20th century and beyond. Although much of it draws heavily on earlier forms, modern composers also experimented with rejection of long-held ideas; notably, Arnold Schoenberg questioned the traditional notions of harmony with his twelve-tone system[?], and John Cage questioned the very definition of music with his use of chance and found sounds.
... as the Schlumpf Collection[?], it has been turned into one of the world's great car museums, the Musée Nationale de l'Automobile.
See also: List of ...