Just as abstraction has played a vital role in the history of modernist painting and sculpture, so too has it found expression in works by leading photographers of the 20th and 21st centuries. Toward Abstraction features the work of Edward Weston, Arthur Siegel, Harry Callahan, Lee Friedlander, Imogen Cunningham, and Robert Mapplethorpe. This exhibition showcases an important recent gift from the collection of David L. Davies and John D. Weeden, as well as selections borrowed from the Paul Sack Photographic Trust.