The following is a list of jazz-influenced classical compositions. Classical music has often incorporated elements or material from popular music of the composer's time. Jazz has influenced classical music, particularly early and mid-20th-century composers, including Maurice Ravel. "While Western classical music emphasizes structure, written scores, and faithful interpretation, jazz thrives on improvisation, spontaneity, and individual expression." Classical music is "more refined and structured", "complex and intricate"; whereas jazz music is "more spontaneous and free-flowing", "upbeat and lively."