American Alliance of Museums
The Alliance manages the Nazi-Era Provenance Internet Portal. It provides a searchable registry of objects in US museum collections that were created before 1946 and changed hands in Continental Europe during the Nazi era (1933-1945). By participating in the Portal, museums can fulfill their responsibility under the Guidelines and Recommended Procedures adopted by the museum field to make Nazi-era provenance information accessible.
Getty Research Institute
The J. Paul Getty Trust maintains the Getty Provenance Index Databases, which are compiled with the collaborative participation of institutions and individuals in Europe and the United States. The databases contain indexed transcriptions of material from auction catalogs and archival inventories of western European works of art, and contain nearly one million records that cover the period from the late 16th century to the early 20th century. The databases are available free of charge via the Web.