“At least 14 big U.S. museums are grappling over war-related art claims, in court or in quiet negotiations. The Metropolitan Museum in New York and the National Gallery of Art in Washington, among others, are locked in a stalemate with Ukrainian and Polish institutions claiming ownership to their Albrecht Dürer drawings. An heir to a German banker has laid claim to a 1500 landscape by Old Master Henri Met de Bles now at the Museum of Fine Arts, Boston, which the heir says the banker was forced to sell by Nazis. These cases may be the tip of the iceberg.”