Konstantin Stanislavski

Konstantin Sergeievich Stanislavski (born Konstantin Sergeievich Alekseiev; Russian: Константин Сергеевич Станиславский; 17 January [O.S. 5 January] 1863 – died 7 August 1938) was a seminal Russian theatre practitioner and actor. https://en.wikipedia.org/wiki/Konstantin_Stanislavski