'Adam and Eve'

Lucas Cranach the Elder's 14th century diptych "Adam and Eve." (Norton Simon Museum / May 2, 2012)

A long-running lawsuit to force the Norton Simon Museum to surrender one of its prized artworks, 480-year-old paired paintings of Adam and Eve by Lucas Cranach the Elder that were looted during the Holocaust, has reached what could be its last legal round: plaintiff Marei Von Saher's recent appeal to the U.S. 9th Circuit Court of Appeals.

If her appeal fails, it could have far-reaching implications, potentially undermining a larger class of claims to recover Nazi-looted art.