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.
André Waignein André Waignein (28 January 1942 – 22 November 2015) was a Belgian composer, conductor, trumpeter, and musicologist. He is well known for his symphonies with over six hundred compositions at the time of his death. Waignein's symphonies were known to be lively and upbeat, and they reflected his character. He was a professor at the Conservatoire Royal de Bruxelles and a director at the Conservatoire de Tournai