Adjacent to the Treasury of the Athenians is a large, protruding boulder. This is Sibyl Rock. Legend suggests the earliest high priestess of Delphi stood here to proclaim her prophecies. The timing of the first sibyl varies. Some suggest the mythical visionary first appeared in the 12th century BC during the Late Bronze Age. Her name was Herophile. She received her powers from Gaia, the Earth Goddess. Successive female prophets were also given the title of Sibyl until the role evolved into the Oracle of Delphi (more on that in a minute).