When was the composer of the ballet Raymonda, director of the Saint Petersburg Conservatory  ?
Alexander Glazunov Alexander Konstantinovich Glazunov (Russian: Алекса́ндр Константи́нович Глазуно́в , 10 August 1865 – 21 March 1936) was a Russian composer, music teacher, and conductor of the late Russian Romantic period. He served as director of the Saint Petersburg Conservatory between 1905 and 1928 and was instrumental in the reorganization of the institute into the Petrograd Conservatory, then the Leningrad Conservatory, following the Bolshevik Revolution. He continued heading the Conservatory until 1930, though he had left the Soviet Union in 1928 and did not return. The best-known student under his tenure during the early Soviet years was Dmitri Shostakovich.
Miron Polyakin Miron Borisovich Polyakin (Russian: Мирон Борисович Полякин ; (February 12, 1895 in Cherkasy - May 21, 1941 in Moscow) was a legendary Imperial Russian and Soviet violinist and pedagogue, one of the best known disciples of the famous Leopold Auer. Between 1917-1926 he toured many countries of the world, and in 1922 gave his New York debut. Upon his return to the Soviet Union, he undertook the professorship position at the Leningrad Conservatory (1928–1936) and then the Moscow Conservatory (1936–1941).