Napoleon once stole several of its panels. The Nazis; they took the whole thing. The Ghent Altarpiece, also known as Adoration of the Mystic Lamb, has been the victim of more than a dozen crimes, including several thefts. Commissioned in the 15th century, it is, today, considered the most famous Flemish painting from the Renaissance period. Since it's completion, though, the work has been cut in half, nearly damaged in fire, and hidden in salt mines -- and part of it's still missing today. It's kind of a miracle it's made it this far through history.