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.
... The population density is 245.1/km² (635.7/mi²). There are 545 housing units at an average density of 167.0/km² (433.1/mi²). The racial makeup of ...