The Library of Congress site offers access to more than 9 million digital items from more than 100 historical collections of primary source materials relating to the history and culture of the United States. The collections include manuscripts, photographs, posters, maps, books, pamphlets, and sheet music, as well as sound recordings and motion pictures and can either be browsed or searched.
"The world's largest collection of materials by and about lesbians and their communities." Includes major photograph and oral history collections. In Park Slope, Brooklyn.
The Manuscripts and Archives Division of the New York Public Library holds over 100 collections pertaining to the history and culture of gay men and lesbians, and to the history of the AIDS/HIV epidemic.
An online hub for digitized historical materials, born-digital materials, and information on archival holdings throughout the world. Based in Worcester, Massachusetts at the College of the Holy Cross, the DTA is an international collaboration among more than sixty colleges, universities, nonprofit organizations, public libraries, and private collections.
The most comprehensive source for English language material printed in the 19th Century. Includes bibliographic access to 71,000 archival collections. Rutgers-restricted Access
Union catalog of over 179 million bibliographic records for titles owned by libraries that participate in/contribute to OCLC. As part of "Advanced Search" allows you to limit your search to "archival materials". (Rutgers-restricted Access)