The Delphic Sibyl, or Delphica, was the priestess presiding over the Apollonian Oracle at Delphi, a Greek colony, located in a plateau on the side of Mount Parnassus. She lived on Mount Parnassus and was believed by many to be a prophet.

The word sibyl comes (via Latin) from the ancient Greek word Σιβυλλα (sibulla), meaning "prophetess". There were many Sibyls in the ancient world, but the Delphic Sibyl was among the most renowned because of the famous receivers of her advice, who were said to be Oedipus, Herakles, Cadmus, Orestes, Perseus and Xuthus.

Two places claimed to be the birthplace of this Sibyl, who is traditionally known as the third Sibyl, namely Marpessus in the Troad and Erythrse . There are various names for the the Sibyl: Pythia, Herophile and Delphica.

Pausanias claimed that the Sybil was "born between man and goddess, daughter of sea monsters and an immortal nymph". Others said she was sister or daughter to Apollo. Still others claimed the Sybil received her powers from Gaia originally, who passed the oracle to Thetis, who passed it to Phoebe.

According to legend, the Sibyl was visited by Herakles after he slew his wife and children in a fit induced by Hera. The Oracle told him as penance he was required to carry out ten tasks set by his arch-enemy, Eurystheus, who had become King in his stead.

According to legend, the Sibyl came from the Troad to Delphi before the Trojan War, "in wrath with her brother Apollo", lingered for a time at Samos, visited Claros and Delos, and died in the Troad, after surviving nine generations of men. After her death, it was said that she became a wandering voice that still brought to the ears of men tidings of the future wrapped in dark enigmas.

References

• The Oracle of Delphi and Ancient Oracles edited by Tim Spalding
• Suda: Delphic Sibyl from Suda On-Line. The Suda is a 10th century Byzantine encyclopedia, incorporating earlier material.