Timeline 6 By Boistin Period: 1908 to 1992 Olivier Messiaen Period: 1912 to 1992 John Cage Period: 1916 to 2011 Milton Babbitt Period: 1923 to 2006 György Ligeti Period: 1925 to 2016 Pierre Boulez Period: 1925 to 2003 Luciano Berio Period: 1928 to 2007 Karlheinz Stockhausen Period: 1933 to 2010 Henryk Górecki