One of the foremost American photographers of the twentieth century, Harry Callahan explored the expressive possibilities of both color and black-and-white photography from the outset of his career in 1938. Following his retirement from teaching at the Rhode Island School of Design in 1977, however, he decided to dedicate his practice exclusively to the color medium and pursue travel to foreign locales. The twentythree photographs in this publication, taken in Morocco in 1981, are the product of Callahans shift to a strictly chromatic palette and demonstrate his continued interest in the visual intrigue of the everyday urban landscape and the passersby who occupy it. Depicting his familiar subjects of architectural facades, random patterns of street activity, and isolated fi gures lost in thought, the images transcend Moroccos exoticism by exploring the formal and pictorial potential of the countrys environment.

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.