A beautiful oil and canvas painted by the hand of an American master, it was stolen sometime between 1970 and 1985.
Once a persistent detective determined it was missing, it was too late to know whether it had once graced a cultured professor's wall or waited patiently in a corner for the day it would be showcased to the masses.
Certainly no one could say who took it. And to this day, nobody knows how "The Silver Chalice with Roses" slipped into the shadows of the art world's international black market.
At least nobody is telling.