Mitrofan Yefimovich Pyatnitsky Митрофан Ефимович Пятницкий
Background information
Born	(1864-07-03)July 3, 1864 Alexandrovka, Russian Empire
Died	January 27, 1927(1927-01-27) (aged 62) Moscow, Russian Empire
Occupation(s)	Musician, gatherer of Russian folk songs

Mitrofan Yefimovich Pyatnitsky^[a] (3 July [O.S. 21 June] 1864 – 21 January 1927) was a Russian and Soviet musician, gatherer of Russian folk songs. He established the famous Pyatnitsky Choir in 1910 from 18 peasants originally from the Voronezh, Ryazan and Smolensk gubernias. After his death, the chorus was named after him.