Semyon Semyonovich Bogatyrev (15 February 189031 December 1960) was a Soviet and Russian musicologist and composer. He is best known in the West for his completion of

Pyotr Ilyich Tchaikovsky Pyotr Ilyich Tchaikovsky ( ; 7 May 1840 – 6 November 1893) was a Russian composer during the Romantic period. He was the first Russian composer whose music made a lasting impression internationally. Tchaikovsky wrote some of the most popula ...

's Symphony in E-flat, which the composer had abandoned incomplete in 1892. In 1893 Tchaikovsky used the first movement as source material for his Piano Concerto No. 3 in E-flat, Op. 75. In 1897,

Sergei Taneyev Sergey Ivanovich Taneyev (, ; – ) was a Russian composer, pianist, teacher of musical composition, composition, music theorist and author. Life Taneyev was born in Vladimir, Russia, Vladimir, Vladimir Governorate, Russian Empire, to a cultur ...

used the remaining movements as source for the ''

Andante and Finale The ''Andante and Finale'' is a composition for piano and orchestra that was reworked by Sergei Taneyev from sketches by Pyotr Ilyich Tchaikovsky for the abandoned latter movements of his single-movement Piano Concerto No. 3 in E-flat, Op. 75. T ...

'' for piano and orchestra, which was published as Tchaikovsky's Op. posth. 79. Between 1951 and 1955, Bogatyrev reconstructed the original Symphony in E-flat as he believed Tchaikovsky might have done had he not become disillusioned with it, and published it as the "Symphony No. 7 in E-flat". It was first performed in Moscow in 1957.

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He also wrote a number of his own compositions. 1890 births 1960 deaths 20th-century Russian composers 20th-century Russian male musicians Academic staff of Moscow Conservatory National University of Kharkiv alumni Saint Petersburg Conservatory alumni Recipients of the Order of the Red Banner of Labour Russian male composers Russian music educators Russian musicologists Soviet male composers Soviet music educators Soviet musicologists {{Russia-composer-stub