Center for Creative Photography

The Center for Creative Photography, established in 1975 and located on the University of Arizona's Tucson campus, is a research facility and archival repository containing the full archives of over sixty of the most famous American photographers including those of Edward Weston, Harry Callahan and Garry Winogrand, as well as a collection of over 80,000 images representing more than 2,000 photographers. The center also houses the archives for Ansel Adams, including all negatives known to exist at the time of his death. The CCP collects, preserves, interprets, and makes available materials that are essential to understanding photography and its history.

Source: Wikipedia