Cassirer v. Thyssen-Bornemisza Collection Foundation
Cassirer v. Thyssen-Bornemisza Collection Foundation, 596 U.S. 107, was a United States Supreme Court case in which the Court held that, in a suit raising non-federal claims against a foreign state or instrumentality under the Foreign Sovereign Immunities Act, a court should determine the substantive law by using the same choice-of-law rule applicable in a similar suit against a private party.