Delphi is famous as the ancient sanctuary that grew rich as the seat of Pythia, the oracle who was consulted about important decisions throughout the ancient classical world. Moreover, the Greeks considered Delphi the navel of the world, as represented by the stone monument known as the Omphalos of Delphi.
It occupies an impressive site on the south-western slope of Mount Parnassus, overlooking the coastal plain to the south and the valley of Phocis. It is now an extensive archaeological site with a modern town of the same name nearby. It is recognised by UNESCO as a World Heritage Site in having had a phenomenal influence in the ancient world, as evidenced by the rich monuments built there by most of the important ancient Greek city-states, demonstrating their fundamental Hellenic unity.