Josef Albers, German-American painter, art pedagogue, and teacher at the Bauhaus, emigrated to the USA after the National Socialists seized power in Germany and the Bauhaus closed in 1933. Albers took up a teaching post at the Black Mountain Collage. Influenced by the movement of Dutch "De Stijl" to the development of the "Abstract painting", he dealt with his perceptual theoretical considerations and contributions to color theory in painting through variations of the "Hommage to the Square" as well as with writing. His work in Abstract and Concrete Art had a great influence on the emergence of American color field painting and Op-Art. His students include Robert Rauschenberg and Richard Serra.