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.
... in 1525 Charles captured François I of France and made him sign the Treaty of Madrid[?] (1526), in which France renounced her claims on Northern Italy. When he ...