45,000 exhibition-quality prints. These holdings span the complete history of photographic processes used in America from daguerreotypes to digital. Photography’s central role in documenting American culture and history, and the medium's evolution as a significant and influential art form in the twentieth-century to the present, are the themes around which the ACMAA photography collection is organized. The personal archives of photographers Carlotta Corpron (1901–1988), Nell Dorr (1893–1988), Laura Gilpin (1891–1979), Eliot Porter (1901–1990), Erwin E. Smith (1886–1947), and Karl Struss (1886–1981) are prominent collection resources. Finding aids and guides for these and other monographic collections are available online under the Collections/Photographs/Learn More tabs on the ACMAA website.The ACMAA photography collection contains early images of Americans at war, anchored by 55 Mexican–American War (1847–1848) daguerreotypes. The collection houses a copy of Alexander Gardner's two-volume work, Gardner's Photographic Sketch Book of the Civil War and a copy of Photographic Views of Sherman’s Campaign (1865) by George Barnard. A group of more than 1,400 nineteenth and early twentieth-century portraits of Native Americans that originated with the Bureau of American Ethnology is another of the collection’s highlights, along with a complete set of Edward Curtis's The North American Indian. The ACMAA’s collection of nineteenth-century landscape photographs includes images by John K. Hillers (1843–1925), William Henry Jackson (1843–1942), Timothy H. O'Sullivan (1840–1882), Andrew J. Russell (1830–1902), and Carleton E. Watkins (1829–1916). Twentieth-century master images by Ansel Adams (1902–1984) are complemented by later twentieth-century landscapes from the studios of William Clift (born 1944), Frank Gohlke (born 1942), and Mark Klett (born 1952). Fine art photographs by Alfred Stieglitz (1864–1946) are the collection's most significant works from the turn-of-the-twentieth-century Photo-Secession movement, a crusade which Stieglitz led. The work of the Photo-Secessionists and other leading photographers of the period is also documented in complete runs of Camera Notes (published 1897–1903), Camera Work (published 1903–1917), and 291 (published 1915–1916). Substantive holdings of twentieth-century documentary photographs include works by Berenice Abbott (1898–1991); prints produced over twenty-five years in connection with Dorothea Lange's The American Country Woman photographic essay; Texas images from the Standard Oil of New Jersey Collection; and project photographs from the 1986 statewide survey Contemporary Texas: A Photographic Portrait. Additionally, twentieth-century documentary photographs by Russell Lee (1903–1986), Arthur Rothstein (1915–1985), Marion Post Wolcott (1910–1990), and many others are housed in the museum's collection. Other substantive groups of twentieth-century photographs in the ACMAA collection are organized around the careers