The Pythia (Gr. Πύθια) was the priestess presiding over the Oracle of Apollo at Delphi, located on the slopes of Mount Parnassus. The Pythia was widely credited with giving prophecies inspired by Apollo, giving her a prominence unusual for a woman in male-dominated ancient Greece. The Delphic oracle was established in the eighth century B.C.E. Its last recorded response was given in 393 C.E., when the emperor Theodosius I ordered pagan temples to cease operation. During this period the Delphic Oracle was the most prestigious and authoritative oracle in the Greek world.
The oracle is one of the best-documented religious institutions of the classical Greek world. Writers who mention the oracle include Herodotus, Euripides, Sophocles, Plato, Aristotle, Pindar, Xenophon, Diodorus, Strabo, Pausanias, Plutarch, Livy, Justin, Ovid, Lucan, and Julian.
The name of the Pythia derived from Pytho, which in myth was the original name of Delphi. The Greeks derived this place-name from the verb pythein (πύθειν, "to rot"), used of the decomposition of the body of the monstrous serpent Python after she was slain by Apollo.
It is often said that the Pythia delivered oracles in a frenzied state induced by vapors rising from the ground, and that she spoke gibberish which priests reshaped into the enigmatic prophecies preserved in Greek literature. This picture has been challenged by scholars such as Joseph Fontenrose and Lisa Maurizio, who show that the ancient sources uniformly represent the Pythia speaking intelligibly, and giving prophecies in her own voice. Recent geological investigations have shown the possibility that ethylene gas caused the Pythia's state of inspiration. Several hundred prophecies of the Oracles of Delphi are known to have survived since classical times, of which over half are said to be historically accurate.
There are many stories of the origins of the Delphic Oracle. One late explanation, which is first related by the first century B.C.E. writer, Diodorus Siculus, tells of a goat herder called Kouretas, who noticed one day that one of his goats, who fell into a crack in the earth was behaving strangely. On entering the chasm, he found himself filled with a divine presence and could see outside of the present into the past and the future. Excited by his discovery he shared it with nearby villagers. Many started visiting the site, until one of them was killed by the experience. From then, only young girls were allowed to approach the chasm and then in conditions regulated by a guild of priests and priestesses.
According to earlier myths, the office of the oracle was initially held by the goddesses Themis and Phoebe, and that the site was sacred first to Gaia. Subsequently it was held sacred to Poseidon, the "Earth-shaker" god of earthquakes, a later offspring of Gaia. During the Greek Dark Age, from the eleventh to the ninth century B.C.E., the arrival of a new god of prophecy, saw the temple being seized by Apollo who expelled the twin guardian serpents of Gaia. Later myths stated that Phoebe or Themis had "given" the site to Apollo, rationalizing its seizure by priests of the new god, but presumably, having to retain the priestesses of the original oracle because of the long tradition. Apparently Poseidon was mollified by the gift of a new site in Troizen.
The Pythia was probably selected, at the death of her predecessor, from amongst a guild of priestesses of the temple, and was required to be a woman of good character. Although some were married, upon assuming their role as the Pythia, the priestesses ceased all family responsibilities, and individual identity. In the heyday of the oracle, the Pythia may have been a woman chosen from a prominent family, well educated in geography, politics, history, philosophy, and the arts. In later periods, however, uneducated peasant women were chosen for the role, which may explain why the poetic pentameter or hexameter prophecies of the early period, later were made only in prose. The archaeologist John Hale reports:
"the Pythia was (on occasion) a noble[woman] of aristocratic family, sometimes a peasant, sometimes rich, sometimes poor, sometimes old, sometimes young, sometimes a very lettered and educated woman to whom somebody like the high priest and the philosopher Plutarch would dedicate essays, other times [one] who could not write her own name. So it seems to have been aptitude rather than any ascribed status that made these women eligible to be Pythias and speak for the God."
During the height of the oracle's popularity, as many as three women served as Pythia, another vestige of the triad, with two taking turns in giving prophecy and another kept in reserve.
Several other officials served the oracle in addition to the Pythia. After 200 B.C.E., at any given time there were two priests of Apollo, who were in charge of the entire sanctuary; Plutarch, who served as a priest in the late first century and early second century C.E., gives us the most information about the organization of the oracle at that time. Before 200 B.C.E., while the temple was dedicated to Apollo, there was probably only one priest of Apollo. Priests were chosen from among the leading citizens of Delphi, and were appointed for life. In addition to overseeing the oracle, priests would also conduct sacrifices at other festivals of Apollo, and had charge of the Pythian games. Earlier arrangements, before the temple became dedicated to Apollo, are not documented.
The other officials associated with the oracle are less well understood. These are the hosioi ("holy ones") and the prophētai (singular prophētēs). Prophētēs is the origin of the English word "prophet," but a better translation of the Greek word might be "one who speaks on behalf of another person. "The prophetai are referred to in literary sources, but their function is unclear; it has been suggested that they interpreted the Pythia's prophecies, or even reshaped her utterances into verse, but it has also been argued that the term prophētēs is a generic reference to any cult officials at the sanctuary, including the Pythia. There were five hosioi,(the holy ones) whose responsibilities are unclear, but may have been involved in some way with the operation of the oracle.
In the traditions associated with Apollo, the oracle gave prophecies only between spring and autumn. In the winter months, Apollo was said to have deserted his temple, his place being taken by his divine half-brother Dionysus, whose tomb was within the temple. It is not known whether the Oracle participated in the Dionysian rites of the Maenads or Thyades in the Korykion cave on Mount Parnassos, although Plutarch informs us that his friend Clea, was both a Priestess to Apollo and to the secret rites of Dionysus. The male priests seem to have had their own ceremonies to the dying and resurrecting God. Apollo was said to return at the beginning of Spring, on the seventh day of the month of Bysios, his birthday. This also would reiterate the absences of the great goddess in winter also, which would have been a part of the earliest traditions.
Once a month thereafter the oracle would undergo special rites, including fasting, to prepare Pythia for the event, on the seventh day of the month, sacred to Apollo. Washing in the Castalian Spring, she then received inspiration by drinking of the waters of the Kassotis from the naiad said to be living in the stream that ran beneath the adyton (a Greek word meaning "do not enter") of the temple where she sat.
Descending into her chamber, she mounted her tripod seat, holding laurel leaves and a cauldron of the Kassotis water into which she gazed. Nearby was the omphalos, the "navel of Earth", flanked by the two golden eagles of Zeus, and the cleft from which emerged the sacred pneuma. The scholar Martin Litchfield West cites the Pythia sitting in a cauldron on a tripod, whilst making her prophecies, her being in an ecstatic trance state, like shamans, and her unintelligible utterings:
"The Pythia resembles a shamaness at least to the extent that she communicates with her [deity] while in a state of trance, and conveys as much to those present by uttering unintelligible words. [cf. "Spirit Language," Mircea Eliade]. It is particularly striking that she sits on a cauldron supported by a tripod, reiterating the triad of the great goddess. This eccentric perch can hardly be explained except as a symbolic boiling, and, as such, it looks very much like a reminiscence of the initiatory boiling of the shaman translated from hallucinatory experience into concrete visual terms. It was in this same cauldron, probably, that the Titans boiled Dionysus in the version of the story known to Callimachus and Euphorion, and his remains were interred close by". 
Consultants, carrying laurel branches sacred to Apollo approached the temple along the winding upward course of the Sacred Way, bringing a black ram for sacrifice in the forecourt of the temple, and a gift of money for the oracle. Petitioners drew lots to determine the order of admission, but big donations to Apollo could secure them a higher place in line. The ram was first showered with water and observed to ensure that it shivered from the hooves upward, an auspicious sign that the oracular reading could proceed. Upon sacrifice, the animal's organs, particularly its liver, were examined to ensure the signs were favorable.
At times when the Pythia was not operating, consultants allegedly obtained information about the future in other ways at the site, through the casting of lots, using a simple questioning "Yes/No" device, or by seeking counsel from [[dream]s.
It would appear that the supplicant to the oracle would undergo a four stage process, typical of shamanic journeys.
There have been occasional attempts to find a scientific explanation for the Pythia's inspiration. Most commonly, these refer to Plutarch's observation that her oracular powers appeared to be linked to vapors from the Castalian Spring that surrounded her, together with the observation that sessions of prophesy would either take place in, or be preceded by, a visit to an enclosed chamber at the base of the temple. For a long period, Mestrius Plutarch (ca. 45 - 125 C.E.) had presided over the Delphic Oracle as a priest at the site. It has often been suggested that these vapors may have been hallucinogenic gases.
The first excavation of Delphi conducted by a French team led by Theophile Homolle of the College de France from 1892 to 1894 and reported by Adolphe Paul Oppé in 1904, stated that there were no fissures and no possible means for the production of fumes. Oppé flatly stated that the French excavations had found no evidence for a chasm underneath the temple.
Following this definitive statement, such scholars as Frederick Poulson, E.R. Dodds and Joseph Fontenrose, all stated that there were no vapors and no chasm. A recent re-examination of the French excavations, however, has shown the possibility that this consensus is mistaken. William J. Broad, in 2006, demonstrates that a French photograph of the south west corner of the temple, taken at the time where the team had excavated down to the bedrock, not only clearly demonstrated the presence of a water-filled pit beneath the temple, but also demonstrated numerous fissures, suggesting numerous pathways by which any intoxicating vapors present could enter the base of the temple.
In 2001, evidence of the presence of ethylene, a potential hallucinogen, was found in the temple's local geology and nearby springs by an interdisciplinary team of geologist Jelle Zeilinga de Boer, archaeologist John R. Hale, forensic chemist Jeffrey P. Chanton, and toxicologist Henry R. Spiller. Ethylene in the highest concentrations was found in the waters of the Kerna spring, immediately above the temple. Although in small quantities, currently the waters of the Kerma spring are diverted from the site for use by the nearby modern town of Delphi. Currently, it is unknown the degree to which ethylene or other gases would be produced at the temple should these waters be allowed to run free, as they did in the ancient world.
It also has been shown recently that the temple of Delphi lies exactly on the intersection of two major fault lines, the north-south, Kerna fault and another east-west Delphic fault paralleling the shore of the Corinthian Gulf, and overlies a local geology of limestone with about 20 percent of its volume comprised of layers of bituminous tars rich in hydrocarbons. The Rift of the Gulf of Corinth is one of the most geologically active sites on Earth. Earth movements there impose immense strains on the earth at accompanying fault lines, heating the rocks and leading to the expulsion of the lighter gasses. It has been disputed as to how the adyton was organized, but it appears clear that this temple was unlike any other in Ancient Greece, in that the supplicant descended a short flight of stairs below the general floor of the temple to enter the Sanctuary of the Oracle. It would appear that a natural cleft or chasm at the intersection of fault lines was enlarged to create the adyton off the centre of the temple, and the flowing waters of the underground springs, would accumulate the gas, concentrating it in the enclosed space. Plutarch reports that the temple was filled with a sweet smell when the deity was present:
Not often nor regularly, but occasionally and fortuitously, the room in which the seat the god's consultants is filled with a fragrance and breeze, as if the adyton were sending forth the essences of the sweetest and most expensive perfumes from a spring (Plutarch, Moralia, 437c).
Only ethylene of all of the hydrocarbons has such an odor.
Inhalation of ethylene in an enclosed space in which the Pythia was separated from the supplicant by a screen or curtain of some kind, it was argued, exposed the Pythia to sufficiently high concentrations of the "narcotic gas" to induce a mildly euphoric or trance-like state. Frequent earthquakes, produced by the fact that Greece lies at the intersection of three separate tectonic plates, seem to have been responsible for the observed cracking of the limestone, and the opening up of new channels by which hydrocarbons enter the flowing waters of the Kassotis (well). This would cause the amounts of ethylene emitted to fluctuate, increasing or decreasing the potency of the drug released, over time. It has been suggested that the decline in the importance of the Oracle after Hadrian (76 – 138 C.E.} was in part due to the fact that there had not been an earthquake in the area for a significant length of time.
In the early twentieth century, an anaesthesiologist named Isabella Herb found that a dose of 20 percent ethylene gas administered to a subject was a clear threshold. A dosage higher than 20 percent caused unconsciousness. With less than 20 percent a trance was induced where the subject could sit up, hear questions and answer them logically, although the tone of their voice might be altered, their speech pattern could be changed, and they may have lost some awareness of their hands and feet, (with some it was possible to have poked a pin or pricked them with a knife and they would not feel it). When patients were removed from the area where the gas accumulated they had no recollection of what had happened, or what they had said. With a dosage of more than 20 percent, the patient lost control over the movement of their limbs and may thrash wildly, groaning in strange voices, losing balance and frequently repeatedly falling. In such cases, studies show that shortly thereafter the person dies. According to Plutarch, who witnessed many prophecies, all of these symptoms match the experience of the Pythia in action.
Plutarch said that the Pythia's life was shortened through the service of Apollo. The sessions were said to be exhausting. At the end of each period the Pythia would be like a runner after a race or a dancer after an ecstatic dance. It clearly had a physical effect on the health of the Pythia.
Dr. Henry A. Spiller, the toxicologist of the team, who directs the Kentucky Regional Poison Center, says "In the first stages, it (the ethylene found) produces disembodied euphoria, an altered mental status and a pleasant sensation. It's what 'street' people would call getting high. The greater the dose, the deeper you go."
All links retrieved June 16, 2019.
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