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 of the census2 of 2000, there are 53,364 people, 21,348 households, and 13,363 families residing in the city. The population density is 481.1/km² ...