Both sides of this Jar illustrate the same episode from the
story of Jason. When Jason returned from Colchis with Medea,
he found that King Pelias had caused the death of his father,
Aison. Jason gave the Golden Fleece to Pelias, but plotted with
Medea to kill him. Medea told Pelias' daughters, Antiope and
Asteropeia, that she could rejuvenate their aged father. To
demonstrate this she cut up a ram in a boiling cauldron and
turned it into a lamb. The daughters, referred to collectively
as the Peliades, were convinced: they cut up Pelias and put
him in the pot, killing him. The two sides are nearly identical,
depicting the boiling of the ram, but the dramatis personae
differ.