Sergei Ivanovich Taneyev (Russian: Серге́й Ива́нович Тане́ев, Sergey Ivanovich Taneyev, pronounced [tɐˈnʲejɪf]; November 25 [O.S. November 13] 1856 – June 19 [O.S. June 6] 1915) was a Russian composer, pianist, teacher of composition, music theorist and author.