A symphony of Three Orchestras was dedicated to someone who died in what year?
Pierre Boulez Pierre Louis Joseph Boulez CBE (] ; 26 March 1925 – 5 January 2016) was a French composer, conductor, writer and organiser of institutions. He was one of the dominant figures of the post-war classical music world.
Harry Harkness Flagler Harry Harkness Flagler (December 2, 1870 - June 30, 1952) was president of the Philharmonic Symphony Society of New York and the National Orchestral Association.