Collection of Omnia-Treuhandgesellschaft, the Deutsche Revisions und Treuhand A.G. and the Wirtschaftprüfstelle, regarding the administration of Jewish property in the Netherlands during 1940-1945 Omnia-Treuhandgesellschaft, the German Office for the Aryanization of Jewish Businesses in the Netherlands, was a German trustee company in Berlin before the war; the Wirtschaftprüfstelle, the organization that supervised the Aryanization of Jewish businesses, gave the order to Omnia for the implementation of the Aryanization process in 1941; Omnia received approximately 16,000 orders for the dissolution of Jewish businesses in the Netherlands during 1941-1944; Included in the collection: Correspondence by Omnia and the Deutsche Revisions und Treuhand - DRT with banks in the Netherlands, such as Lippmann Rosenthal & Co, regarding the confiscation of Jewish property; Correspondence by Omnia and the DRT with the Niederländische Aktiengesellschaft für Abwicklung von Unternehmungen - NAGU, a business mediator organization, regarding the Aryanization of Jewish businesses in the Netherlands; Correspondence by Omnia and the DRT with the Wirtschaftprüfstelle in Berlin; Internal correspondence by Omnia, mainly between the Sachbearbeiter, which was responsible for the dissolution of assets, and with the heads of Omnia in the Netherlands; Lists of businesses, for the purpose of locating the assets of deported Jews; Appraisal reports and inventory lists of property confiscated by Omnia and the Deutsche Revisions und Treuhand A.G. in the Netherlands; Financial reports, prepared for the Wirtschaftprüfstelle by Omnia and the DRT upon the completion of the dissolution of a business; Correspondence by Omnia and the DRT with factories and with the Bureau of Commerce in the Netherlands, regarding the registration of businesses.