Модест Петрович Мусоргский (Modest Petrovich Mussorgsky) (March 21 [O.S. March 9], 1839 – March 28 [O.S. March 16], 1881), one of the Russian composers known as the five, was an innovator of Russian music. He strove to achieve a uniquely Russian musical identity, often in deliberate defiance of the established conventions of Western music. Many of his major works were inspired by Russian history, Russian folklore, and other nationalist themes, including the opera Boris Godunov, the orchestral tone poem Night on Bald Mountain, and the piano suite Pictures at an Exhibition.