The United States Holocaust Memorial Museum (USHMM) "is America’s national institution for the documentation, study, and interpretation of Holocaust history, and serves as this country’s memorial to the millions of people murdered during the Holocaust".
THe USHMM has extensive resources for researchers, an overview can be found here.
Of particular interest are the various collections which can be searched online:
"Online catalogs provide partial access to some of the Museum’s collections. Please note that new material is being added to the online catalogs on a continuing basis. Currently, web users may search the following online catalogs:
- Photo Archives (including historical photographs, photographs of the Museum and its programs, and images of the Museum’s collection of original artifacts.)
- Library and Archival Collections (including oral history, art and artifacts)
A combined catalog of the Library’s published materials (books, serials, historical newspapers, feature films and documentaries, CDs, DVDs, and other media), and the Archives unpublished materials (collections on paper or microform, personal artifacts, video and audio tapes, artwork and three-dimensional objects.)
- Archival Guide to the Collections
A general overview of the collections of textual records available in the Museum’s Archives.
- Archival Finding Aids
Detailed inventories and finding aids that have been produced for selected collections in the Museum’s Archives.
- Steven Spielberg Film and Video Archive
This catalog provides access to the Museum’s comprehensive collection of historical films documenting the Holocaust and World War II. Locate film clips and shot descriptions of over 1000 hours of footage.
- Holocaust Name Lists Catalog
A database of lists of Holocaust-related names searchable by place of persecution not by individual.
- International Tracing Service Inventory
Contains an overview of the 21,000 historical collections of documentary materials contained within the archive of the International Tracing Service."
See a separate entry for the USHMM Photo Archives here.