Detail of Sebasteion depicting Herakles freeing Prometheus.
It is interesting to compare in this image the faces of Prometheus and Herakles. Prometheus, who is looking down and across and would have been visible from the ground, has a very carefully modelled and expressive face. Herakles, on the other hand, who is looking up and would not have been visible from the ground, is left with a relatively roughly finished face.
