Harry Callahan (1912–99) began his career as an amateur photographer. Following a workshop with Ansel Adams in 1941 and a meeting with Alfred Stieglitz in 1942, Callahan decided to completely devote himself to the medium. In 1946 he accepted László Moholy-Nagy’s invitation to teach at Chicago’s Institute of Design, a position he left in 1961 to chair the Photography Department at the Rhode Island School of Design. Since his first one-person show in 1947, Callahan’s work has been the subject of over sixty solo and group exhibitions worldwide, eighteen of which were presented at The Museum of Modern Art, New York.