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.
... Switzerland, Africa and America. A free (meaning, not state controlled) synod of the Reformed Church emerged in 1848 and survives in small numbers to the present time. ...