Konstantin Saradzhev conducted a number of premieres of works by this Russian composer of the romantic period born in 1840 who was honored by which Russian monarch?
Konstantin Saradzhev:  He was an advocate of new Russian music, and conducted a number of premieres of works by Pyotr Ilyich Tchaikovsky, Modest Mussorgsky, Igor Stravinsky, Sergei Prokofiev, Nikolai Myaskovsky, Dmitri Shostakovich, and Aram Khachaturian. Pyotr Ilyich Tchaikovsky: Pyotr Ilyich Tchaikovsky ( ; Russian: Пётр Ильи́ч Чайко́вский ; 25 April/7 May 1840 – 25 October/6 November 1893), often anglicized as Peter Ilich Tchaikovsky, was a Russian composer of the romantic period, some of whose works are among the most popular music in the classical repertoire. Pyotr Ilyich Tchaikovsky:  Tchaikovsky was honored in 1884, by Emperor Alexander III, and awarded a lifetime pension.
Emperor Alexander III