Josef Albers (1888–1976) is best known for his long engagement with the square, which he painted in exquisite variation more than a thousand times. A German–American painter, he trained in Berlin and Munich before enrolling at the Bauhaus (the leading modernist art and design school) in 1920. He was a student there for three years and a teacher for ten (longer than anyone else), his chosen craft was stained glass, and his teaching ranged from typography to furniture.