According to Greek legend, Prometheus was punished for stealing fire from Olympus and giving it to man by being chained to a rock. Daily an eagle feasted on his liver, which grew again during the night. Napoleon's perforated ulcer did not repair itself.
Apparently this medal was created in Italy. NON DI LUI MA DI CHI LO TRADI IMAGO (the image not of him but of the man who betrayed him) is apotropaic, preventing portraying Napoleon as Prometheus from bringing harm to him.
