Palaestra
Hermes Enagonios ("Hermes of the Contest") presided over the palaestra. He was depicted on a rectangular piece of marble as a head and an erect penis. Hermes was the god of wrestling and sometimes said to be the father of Palaestra, the goddess of wrestling. In Greek art, a herm often indicates the scene is a palaestra. Statues of Apollo and Herakles also stood in a palaestra.