Jurisdiction — In general — Territorial — Territorial limits of jurisdiction — Expropriation — Works of art nationalized in U.S.S.R. and sold in Germany — Whether expropriation occurring in U.S.S.R. or in Germany — Act of State doctrine — The law of the United States

States as international persons — In general — Recognition of acts of foreign States and governments — Expropriation — Action in conversion against purchasers of works of art expropriated by the Government of the U.S.S.R. — Whether expropriation occurred in the U.S.S.R. or in Germany — Act of State doctrine — The law of the United States