The philosopher, spiritual leader, writer and composer Georges Gurdjieff was born in the second half of the 19th century in Armenia. He formulated the concept of the Harmonious Development of Man during his travels throughout the world in search of truth. His remarkable musical repertoire is based on the music he heard in Armenia, the Caucasus, the Middle East and many parts of Central Asia, India and North Africa, where he became acquainted with a great amount of spiritual and folk music, rituals and dance traditions. Gurdjieff’s music comprises some 300 works and fragments of works for piano that he composed in the 1920s by dictating them to his student, the Russian composer and pianist Thomas de Hartmann. Nowadays, Gurdjieff’s compositions are mainly studied in the West by using De Hartmann’s piano transcriptions.