М. Е. Пятницкого) is a Russian musical group which was established by Mitrofan Pyatnitsky in 1910 initially with 18 peasants from Voronezh, Ryazan and Smolensk gubernias.

The performers sang, enacted dance scenes and played folk instruments.

In its early years the chorus received high praise from Russian musicians Sergei Rachmaninov and Fyodor Chaliapin.

The ensemble was enlarged with a dance group and orchestra of Russian folk instruments in the 1930s, led by Vasily Khvatov.

In its long existence, it has visited every port of the former Soviet Union and toured Czechoslovakia, Poland, Bulgaria, Romania, Hungary, Austria, Finland, Canada, Israel, Japan, Sweden, Mexico, Germany, USA, Australia, New Zealand, Norway and Luxembourg.