A pioneer of modern art, Kandinsky is often regarded as having created the first painting that was purely abstract in form. Initially influenced by Symbolism and Russian folk art, he founded the Expressionist collective Der Blaue Reiter in Munich in 1910, along with a mixture of Russian and German avant-garde artists. His belief that art should express a sense of spirituality through a visual language of form and colour was a critical factor in his move towards abstraction. A theorist as well as a practitioner, Kandinsky was heavily involved in reforms to art teaching and museums in Russia in the wake of the 1917 revolution. He returned to Germany in the 1920’s, to teach design and art theory at the Bauhaus. His work became a significant influence on later styles of art, such as Abstract Expressionism and Minimalism.