Prometheus is screaming in pain. Roman relief sculpture, Aphrodisias, Turkey. © Paul Edward Williams 2012

Zeus had given him a terrible punishment for giving fire to man: he was tied to the Caucasus mountains and had his liver picked out daily by an eagle. Herakles shot the eagle and is undoing the first manacle. He wears his trade mark lion-skin and thrown his club to one side. A small mountain nymph, holding a throwing stick appears amongst the rocks.