Delphi: the navel of the world and the oracle that guided kings

Croesus, king of Lydia — the man credited in legend with inventing coined money — wanted to know whether he should attack the Persian Empire. Before deciding, he sent envoys to seven oracles, submitting them to a test: ask each one what Croesus was doing on the hundredth day after their departure. Only the oracle at Delphi answered correctly. Croesus paid enormous tribute — 270 kilos of pure gold, among other offerings — and then asked the question that really mattered. The answer was: “If you cross the river Halys, you will destroy a great empire.” Croesus crossed the Halys. He destroyed a great empire. His own.

This anecdote, preserved by Herodotus, is the best illustration of how the Delphic oracle worked. It was not simple charlatanism, nor was it straightforward prophecy. It was a sophisticated institution that produced deliberately ambiguous answers, making it effectively irrefutable. If the outcome was favourable, the oracle had been right. If unfavourable, the questioner had misread the response. For nearly a thousand years, this worked extraordinarily well.

The omphalos and sacred geography

The Greeks called Delphi the omphalos — the navel of the world. The myth behind this designation held that Zeus, wishing to find the exact centre of the universe, released two eagles simultaneously from opposite ends of the earth. The birds flew toward the centre and met precisely at Delphi. A stone carved in the shape of an egg — the omphalos — marked the spot. A replica is in the Archaeological Museum of Delphi; the Hellenistic-period original is also preserved there.

Delphi’s location has its own geographical logic, independent of mythology. The sanctuary sits on the slopes of Mount Parnassus at around 570 metres altitude, looking out over the Gulf of Corinth. It was reachable by sea through the port of Kirra (today Itea, roughly twelve kilometres south) and by land along several roads converging on the site. In the ancient world, where maritime routes were the arteries of commerce and diplomacy, Delphi was well positioned to receive delegations from across the Mediterranean.

The Pythia and the mechanics of trance

The oracle operated from the eighth century BC until 390 AD, when Emperor Theodosius I, in the context of his Christianisation of the Roman Empire, shut it down permanently. That is over a thousand years of uninterrupted operation, during which virtually every politically significant actor in the ancient Mediterranean consulted it.

The priestess who conveyed Apollo’s answers was the Pythia, an older woman selected from among the inhabitants of Delphi. She would enter the innermost chamber of the temple — the adyton — and at some point in the process would enter a state of trance or exaltation from which she pronounced the responses. The temple priests transcribed and reformulated these, generally in dactylic hexameters, the metre of Greek epic poetry.

Modern geology offers a hypothesis about the trance mechanism that has gained scientific acceptance over recent decades. Geological research at the Delphi site, published by John Hale and others in 2001, identified the intersection of two active fault lines directly beneath the Temple of Apollo. Through those faults, gases from the underlying rock chamber may have emanated, including ethylene — a gas with anaesthetic and dissociative properties. Moderate amounts of inhaled ethylene in an enclosed space can produce exactly the symptoms that ancient texts describe for the Pythia: exaltation, loss of inhibition, fragmented speech. It is not the only explanation, but it is the most coherent with available evidence.

What remains at the site

The sanctuary of Delphi as visited today is the result of over 130 years of archaeological excavation, begun by the French School at Athens in 1892. To excavate the site, it was necessary to demolish the modern village that had grown over it during the Ottoman period and relocate its inhabitants to the current village of Delphi, about two kilometres to the east.

The Sacred Way, the path that climbs from the sanctuary entrance to the Temple of Apollo, was once flanked by dozens of treasury buildings — small structures dedicated by different Greek city-states to house their votive offerings. The Treasury of the Athenians, built to celebrate the victory at Marathon in 490 BC, is the only one that has been reassembled from its original blocks and gives the best sense of what these structures looked like. The Temple of Apollo itself is represented by six standing Doric columns — enough to imagine the building’s scale, not enough to forget how much is gone.

The Theatre, carved into the hillside above the temple, held five thousand spectators and hosted the musical and dramatic competitions of the Pythian Games. The Stadium of Delphi, higher still, with capacity for seven thousand, was the venue for the athletic events. The Pythian Games were the second most important in antiquity after the Olympics and were held every four years.

The museum, the charioteer and what archaeology saves

The Archaeological Museum of Delphi deserves as much time as the outdoor site. The most famous piece is the Charioteer of Delphi, a bronze sculpture from the fifth century BC depicting a chariot driver in the moment of victory. It is one of the most perfect Greek sculptures to survive: the cloth falling vertically over the feet, the glass-paste eyes that still look out, the posture combining tension and calm. It was found buried — probably hidden after an earthquake or fire — in 1896, during the first year of systematic excavations.

The omphalos stone, the Sphinx of Naxos (a sixth-century BC votive offering two metres tall), and the fragments of the Siphnian Treasury frieze complete a collection that is essential for anyone who wants to understand what Delphi was, beyond the rubble of its ruins.

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