Olga De Hartmann
Thomas Alexandrovich de Hartmann (Russian: Фома́ Александро́вич Га́ртман; September 21, 1885 – March 28, 1956) was a Russian composer and prominent student and collaborator of George Gurdjieff.
Read more about Olga De Hartmann: Biography, Association With Gurdjieff, Music, Recordings