The Detroit Institute of Arts
- List of all the paintings that entered the collection from 1932 to the present day, for which there are gaps in the provenance during the period 1932-1946.
- http://www.dia.org/the_collection/provenance_information/

Los Angeles County Museum of Art
- Report on LACMA's research on the provenance of paintings in its departments of Modern and Contemporary Art and European Paintings and Sculpture.
- http://www.lacma.org/art/ProvIntro.aspx

The American Association of Museums
- Contains guidelines for American museums concerning the unlawful appropriation of objects during the Nazi era.
- http://www.aam-us.org/museumresources/prov/index.cfm

Cleveland Museum of Art
- Provenence research project guidelines. Includes a list and photos of paintings that either have gaps in their provenance or that were known to have been confiscated by the Nazis.
- http://www.clemusart.com/provintro.htm

National Gallery of Canada Provenance Research
- Lists European paintings with incomplete or not fully documented provenances for the period 1933-1945.
- http://cybermuse.gallery.ca/cybermuse/enthusiast/provenance/index_e.jsp

Museum of Modern Art
- Lists fourteen works from the MoMA collection with gaps in their histories between 1933 and 1945.
- http://www.moma.org/collection/provenance/

Philadelphia Museum of Art
- Images and provenance information for art objects, especially European paintings, whose whereabouts during the war years may be in question.
- http://www.philamuseum.org/collections/provenance/

Hood Museum of Art, Dartmouth College
- Searchable online database of provenance research.
- http://www.dartmouth.edu/~hood/provenanceresear.html

Art Gallery of Ontario: Spoliation Research
- Lists paintings, sculptures, and drawings in the gallery's European collection with gaps in their provenance between 1933-1945, with a description of the gallery's provenance research efforts.
- http://www.ago.net/info/collection/provenance/

Seattle Art Museum
- Lists works of art in the European collection that have gaps in their provenance during the Nazi era (1933 - 1945).
- http://www.seattleartmuseum.org/collection/HolocaustProvenance.asp

Museum of Fine Arts, Boston
- Results of research undertaken by the MFA on the history of ownership of its collection of European paintings.
- http://www.mfa.org/research/

The Metropolitan Museum of Art
- Lists 338 European paintings with incomplete provenance for the World War II era.
- http://www.metmuseum.org/collections/provenance_a-f.htm

Getty Museum
- Provenance of works in the Getty's collections, from the rise to power of the Nazi party to its defeat. Includes links to Holocaust-era art issues.
- http://www.getty.edu/art/provenance/

The Art Institute of Chicago
- Painting and sculpture provenance report.
- http://www.artic.edu/aic/provenance/index.html

National Museums in the United Kingdom
- Progress report on provenance research for the period 1933-1945.
- http://www.nationalmuseums.org.uk/spoliation/spoliation.html

National Gallery of Art, Washington D.C.
- World War II provenance research. Photos and history for eleven paintings in the collection that were looted during the war.
- http://www.nga.gov/collection/provfeat.htm