1 Introduction.- 2 United States v. iPortrait of Wallyi.- 3 Altmann v. Republic of Austria.- 4 Westfield v. Federal Republic of Germany.- 5 Orkin v. Taylor.- 6 Von Saher v. Norton Simon Museum of Art.- 7 Cassirer v. Kingdom of Spain and Thyssen-Bornemisza Collection Foundation.- 8 Grosz v. Museum of Modern Art.- 9 Bakalar v. Vavra.- 10 Museum of Fine Arts, Boston v. Seger-Thomschitz.- 11 Schoeps v. Museum of Modern Art.- 12 De Csepel v. Republic of Hungary.- 13 Detroit Institute of Arts and Toledo Museum of Art v. Ullin.- 14 Vineberg v. Bissonnette.- 15 Conclusion.pp