According to Greek myth, Zeus released two eagles from opposite ends of the earth to find its centre; they met above the slopes of Mount Parnassus, and there Delphi was founded — marked ever after by a carved stone, the omphalos, meaning "navel." Whatever the myth's origins, the sanctuary that grew on that mountainside became the single most consulted source of divine guidance in the ancient Greek world, its oracle's pronouncements shaping wars, colonisation ventures and the decisions of kings from Lydia to Sparta.
Delphi's sanctuary of Apollo occupies a dramatic terraced site on the southern slopes of Mount Parnassus, overlooking the valley of Phocis toward the Gulf of Corinth. At its centre stood the Temple of Apollo, and within an inner chamber of that temple, the Pythia — Apollo's priestess and the sanctuary's oracle — delivered the pronouncements that made Delphi famous throughout the Mediterranean world for more than a thousand years, from at least the 8th century BCE until the site's closure in 393 CE.
Approaching the temple, visitors climbed the Sacred Way, lined on both sides with treasuries built by rival Greek city-states — small, elaborately decorated buildings that functioned as both offerings to Apollo and as public displays of wealth and piety, each city competing to outshine its neighbours in the eyes of the god and of every other visiting delegation. The Athenian Treasury, one of the best preserved, was reportedly built to commemorate the victory at Marathon.
Delphi also hosted the Pythian Games, one of the four great Panhellenic athletic festivals alongside the Olympic Games, held every four years and combining athletic and musical competitions in Apollo's honour — a reminder that the sanctuary functioned as a major pan-Greek cultural centre, not solely as a place to consult the oracle.
Know thyself. Nothing in excess.
— Maxims inscribed at the entrance to the Temple of ApolloDelphi's influence gradually declined through the Hellenistic and Roman periods as political power shifted and scepticism toward oracular religion grew, though the site continued to function, with occasional interruptions, into Late Antiquity. In 393 CE, the Christian Roman emperor Theodosius I, as part of a broader campaign against pagan religious practice across the empire, ordered the closure of the sanctuary, ending well over a thousand years of continuous oracular activity.
The site was subsequently built over by the village of Kastri and largely lost to systematic study until the late 19th century, when the French School at Athens undertook a major excavation — controversially requiring the relocation of the entire existing village to a new site nearby in order to expose the ancient ruins beneath it. That excavation revealed the temple foundations, the treasuries, the theatre and stadium, and confirmed much of what ancient authors had described.
Myth, geology and history, entangled: Delphi is a rare case where a claim long treated as pure literary embellishment — intoxicating vapours from the earth — has gained genuine scientific support from modern geological survey, while the oracle's actual predictive power remains, as it always was, a matter of interpretation rather than verification.