Hyampeia is a mountain peak above the Castalian Spring in Delphi, Greece. Its modern name is Flemboukos.[1] It is the eastern peak of the Phaedriades, the western peak was known as Nauplia.[2] According to Herodotus, there was a sacred precinct at the foot of Hyampeia dedicated to the Delphic hero Autonous at the time of the Persian Wars. A battle between the Delphians and the Persians took place here during that war in which the Delphians won and prevented the Persians from looting Delphi.[3]