Additionally in the late 19th century in Eastern Europe mysticism and early modernist religious philosophy as expressed by theosophist Mme. Blavatsky had a profound impact on pioneer geometric artists like Hilma af Klint and Wassily Kandinsky. The mystical teaching of Georges Gurdjieff and P.D. Ouspensky also had an important influence on the early formations of the geometric abstract styles of Piet Mondrian and his colleagues in the early 20th century. The spiritualism also inspired the abstract art of Kasimir Malevich and František Kupka.