Joseph Albers was a German-born American artist best known for his work as a painter and printmaker. He is also known for his influential teaching methods, which emphasized the study of colour theory. Albers was born in Bottrop, Germany, in 1888. He studied art at the Bauhaus school in Weimar from 1920 to 1923. In 1933, he relocated to the United States, where he taught at Black Mountain College in North Carolina. In 1950, he joined the faculty of Yale University, where he remained until his retirement in 1958. During his career, Albers produced a small body of work that includes paintings, prints, and sculptures. His best-known paintings are his "Homage to the Square" series, in which he explored the optical effects of nesting squares within each other. Albers died in New Haven, Connecticut, in 1976.