Pythia was the title of the high priestess of the Temple of Apollo at Delphi. She specifically served as its oracle and was known as the Oracle of Delphi. Her title was also historically glossed in English as the Pythoness.
The Pythia was established at the latest in the 8th century BC, and was widely credited for her prophecies uttered under divine possession by Apollo. The Pythian priestess emerged pre-eminent by the end of the 7th century BC and continued to be consulted until the late 4th century AD. During this period, the Delphic Oracle was the most prestigious and authoritative oracle among the Greeks, and she was among the most powerful women of the classical world.
Wikipedia https://en.wikipedia.org/wiki/Pythia
Address 33054, Greece
Coordinates 38°28'55.919" N 22°30'3.71" E