**FILE**German composer and musician Karlheinz Stockhausen performs at the German pavillon at the Expo '70 in Osaka, Japan in 1970. Stockhausen gave a concert for 130 students of a Japanese "Soai Girls College." Karlheinz Stockhausen, one of Germany's most important postwar composers, has died, German state broadcaster ZDF reported Friday Dec 7, 2007 . He was 79. Stockhausen, who gained fame through his avant-garde works in the 1960s and 70s, died on Wednesday, ZDF said. He provoked controversy in 2001 when he described the Sept. 11, 2001 attacks in the United States as "the greatest work of art one can imagine." (AP Photo)