Similar lawsuit over Guelph Treasure was also thrown out in Germany, where court rejected claims that 1935 sale was forced and was below fair market value

Heirs of Jewish art dealers claimed relatives were forced to sell Guelph Treasure collection of medieval Christian artwork at a loss in the 1930s; US judges decline to intervene

California man has waged decades-long battle, saying grandfather was forced to sell prized collection to Nazis; German authorities argue the sale was done willingly