The recently released movie "The Monuments Men" tells of Hitler's attempt to steal or destroy Europe's greatest works of art, and the men FDR sent into harm's way to stop him. Thousands of works of art and many masterpieces were recovered and returned to their rightful owners. Yet today, seven decades after the fall of the Third Reich, other stolen works of art—some from owners who perished in the Holocaust—hang in museums in Europe and in America.

In the U.S., for instance, the Norton Simon Museum in Pasadena, Calif., is fighting a claim by Marei von Saher, heir of Jewish Dutch art dealer Jacques Goudstikker, whose collection was forcibly sold to the Nazis in 1940.