The Office of Provenance Research and its successor institution, the German Lost Art Foundation, financed four projects at the Klassik Stiftung Weimar between 2009 and 2016:
- 2013–2016: "Provenances, contexts of acquisition, search for legatees – Research on suspected cases of Nazi-confiscated cultural property in the collections of the Klassik Stiftung Weimar"
- 2010–2013: "Nazi-confiscated cultural property as a result of persecution in the collection holdings of the KSW"
- 2009–2010: "Nazi-confiscated libraries of political and cultural associations" at the Herzogin Anna Amalia Bibliothek
- 2009: "Acquisitions from the Nathansohn collection by the predecessor institution of the Klassik Stiftung Weimar"
Until 2010, provenance research on Nazi-confiscated cultural property in the collections of the Klassik Stiftung Weimar focused on specific aspects or smaller sections of the holdings.
