Affirmed an art museum's title to two oil paintings that the Nazis had stolen from the plaintiff's father-in-law during World War II. The plaintiff sued the museum to recover the two Renaissance masterpieces, but the museum insisted it had good title because the Dutch government validly conveyed the paintings after the war to the person who sold them to the museum. Concluding that the act-of-state doctrine applied here, the Ninth Circuit affirmed summary judgment in favor of the museum.