The word the ancient Greeks used was pharmakeia.
It did not mean witchcraft in the sense that the medieval European tradition would later load that word with: the diabolical compact, the sabbath, the broomstick, the social terror of a community turning on its most vulnerable women. Pharmakeia meant knowledge of substances, specifically of the plants and preparations that produced effects on the human body and mind that ordinary experience could not easily account for. The practitioner of pharmakeia was a person who knew which plant, prepared in which way, administered in which quantity, produced healing or harm or altered perception or induced sleep or reversed a fever. The boundary between the physician and the witch, in the ancient Greek understanding, was a boundary of intention and of social position, not a boundary of knowledge. They worked from the same pharmacopoeia.
The witches of ancient Greece were, in the first instance, women who knew things that others did not. The knowledge was real, its application was practical, and the power it conferred was genuine in the specific sense that the preparations worked. What made a woman a pharmakis, a worker of pharmakeia, rather than a physician or a herbalist was the combination of her knowledge with her gender, her independence, and her willingness to apply what she knew outside the structures of social and divine authorization.
Circe and Medea, the two figures whose names the ancient record preserved most fully, were not supernatural beings in the sense of being exempt from the physical world’s requirements. They were women of exceptional knowledge operating in contexts that the social order of the ancient world had not prepared to accommodate them.
Circe on the Island
Homer places Circe on Aeaea, an island at the edge of the known world in the geographic imagination of the Odyssey, far enough from the centers of civilization that the normal rules of social conduct cannot be assumed to apply there. This placement is not incidental. The witch in the Greek tradition operates at the margin, in the cave, on the island, at the crossroads, in the places where the organizing structures of the city and the household and the religious community do not reach.
Circe is the daughter of Helios and the ocean nymph Perse, which places her at the intersection of the two forces that shape time and tide: the sun that marks the day and the sea that connects the world’s edges. Her knowledge of pharmakeia is not learned. It is inherited from a divine lineage that associated her maternal family with Hecate and her paternal family with the light that reveals what darkness conceals. She was born into the knowledge that other practitioners of pharmakeia spent their lives acquiring.
The transformation of Odysseus’s men into swine is the episode that dominates the modern memory of Circe, but it is not the most interesting thing Homer’s account records about her. What is more interesting is what happens after Odysseus, protected by the moly that Hermes gave him, reverses the transformation and compels Circe to restore his men. She does. And then Odysseus and his crew stay on Aeaea for a year, feasting and resting, with Circe as their host and Odysseus as her companion.
The Circe who hosted Odysseus for a year was not his enemy. She was an autonomous woman of extraordinary capability living on an island outside the social structures that would otherwise govern her conduct, and when she met a man capable of meeting her on her own terms, the outcome was not combat or subjugation but something that Homer’s text describes as hospitality extended with genuine generosity. She warned Odysseus about the Sirens. She told him how to navigate past Scylla and Charybdis. She directed him to the underworld and explained how to conduct the ritual that would allow him to speak with the dead.
The witch who turned men into swine and the guide who provided the most practically useful intelligence Odysseus received on his entire ten-year journey home are the same person. The transformation episode established her power. Everything that followed demonstrated what she chose to do with it.
Medea and What She Knew
Medea came from Colchis, the kingdom at the eastern end of the Black Sea that the Greek world placed at the furthest edge of the known world, as far east as Aeaea was far west. The symmetry is not accidental: the Greek mythological tradition placed its most powerful women at the geographic margins, in the kingdoms that began where the mapped world ended.
Colchis was the land of the Golden Fleece, the destination of Jason and the Argonauts, and Medea was the daughter of its king and a priestess of Hecate. Her knowledge of pharmakeia was the most comprehensive documented in any ancient Greek source. She put the dragon that guarded the Fleece to sleep with a preparation whose specific ingredients the ancient texts record. She gave Jason a protective ointment that made him immune to fire and blade for the duration of the trials that her father imposed on him. She restored the youth of Jason’s aged father Aeson through a process of ritual and herbal preparation that Ovid describes in detail in the Metamorphoses, a passage that represents the most extended ancient account of a witch’s practice in the surviving record.
She also killed Pelias by convincing his daughters that the same restorative ritual would work on their father, providing them with a preparation that would not produce the intended effect. The same knowledge, applied with different intention, produced opposite results. This is the pharmakeia logic operating with its clearest internal consistency: the knowledge itself is neutral. What determines the outcome is the intention of the person applying it and the condition of the person receiving it.
Euripides’ tragedy of Medea, produced in Athens in 431 BCE, is the text that fixed the final form of her story in the Western literary imagination. The murder of her children, committed as revenge against Jason for his abandonment of her in favor of a politically advantageous marriage to the princess of Corinth, is the act that the tradition has found most difficult to accommodate within any framework of sympathy or understanding. Euripides himself appears to have invented it: earlier versions of the Medea myth recorded the children’s deaths as accidents or as the result of the Corinthians’ violence, not as Medea’s deliberate act.
The Euripidean Medea is a figure of psychological complexity that the category of witch does not contain. She is a woman who has given up everything, family, country, divine patronage, social position, to follow a man whose claim on her loyalty proved to be entirely contingent. The murders are not the act of a sorceress. They are the act of a person who has determined that the only remaining form of power available to her is the power to deprive her betrayer of what he values most.
The pharmakeia is almost incidental in the tragedy. Medea uses it at the end to kill her rival and the rival’s father with a poisoned gift. But the tragedy’s weight does not rest on the magic. It rests on the sequence of human decisions that brought Medea to Corinth, placed her in this specific dependency, and then removed even that dependency when Jason chose to replace her.
The Plains of Thessaly
The region of Thessaly, the broad agricultural plain of central Greece enclosed by the Pindus mountains to the west, Olympus to the north, and the Aegean coast to the east, had a specific and persistent reputation in the ancient world as a place where witchcraft was practiced with exceptional skill and exceptional frequency.
The reputation predates any single text that documents it and persists through sources spanning several centuries, from the classical period through the Roman imperial era. Thessaly was to ancient witchcraft what Colchis was to Medea: the landscape of the practice, the place whose geography and plant life and social conditions produced practitioners of a specific and recognizable kind.
The Thessalian witches were most famous in the ancient sources for a specific capability: drawing down the moon. The ability to affect the movement of the moon, to pull it from its course in the sky and bring it close to the earth, was the most extreme claim made on behalf of any human practitioner of magic in the ancient world, because the moon governed tides, seasons, fertility cycles, and the measurement of time. A person capable of affecting the moon was a person capable of affecting the conditions of life itself.
The practical basis for this reputation was most likely the use of preparations that produced specific observable effects: the darkening of the sky during a lunar eclipse, which the Thessalian practitioners may have been able to predict through accumulated astronomical observation and then present as the result of their intervention. The gap between predicting an eclipse and claiming to cause one is, from the perspective of a non-expert witness, invisible. The witch who knew the eclipse was coming and announced it as the result of her ritual was demonstrating real knowledge in a form that looked like supernatural power.
The plant knowledge associated with Thessalian witchcraft was grounded in the specific flora of the region. The mountain slopes of the Pindus and Olympus that enclosed the Thessalian plain produced a range of medicinal and psychoactive plants that were not available in the same concentrations elsewhere in Greece. The women who gathered these plants, who knew their properties and their preparations, who worked with Hecate as their divine patron in the liminal spaces that her domain governed, were operating within a real tradition of botanical knowledge that the ancient world encoded as witchcraft because the social structures of the time had no other category available for women exercising this specific form of expertise.
Lucan’s Pharsalia, the Roman epic written in the first century CE, includes an extended account of a Thessalian witch named Erichtho that is the most detailed surviving ancient description of witchcraft practice. Erichtho inhabits tombs, uses parts of the dead in her preparations, and commands the boundaries between living and dead with an authority that surpasses even Hecate’s. Lucan’s portrait is deliberately extreme, designed to produce horror in his Roman audience, but its specificity about the plants, the rituals, and the geographic setting of Thessaly reflects a tradition of knowledge about the region’s witchcraft practices that predated his own account by several centuries.
One enduring belief held that a “true witch” could control the moon—a celestial power often associated with the rhythms of nature, fertility, and transformation. In this way, Thessalian witches were seen as intermediaries between the mortal and divine, the earthly and the ethereal.
Hecate and the Patronage of the Practice
The goddess who appears at the center of the ancient Greek witchcraft tradition is Hecate, whose transformation from light patroness to goddess of crossroads and witchcraft was traced in the previous account of her myth.
The connection between Hecate and the practitioners of pharmakeia is not simply a matter of divine patronage in the way that Athena patronized crafts or Poseidon patronized sailors. It is a structural connection between the domain of the goddess and the knowledge of the practitioner. Hecate governed thresholds, including the threshold between life and death, between the visible world and the invisible one, between the state of health and the state of illness. Pharmakeia operated precisely at these thresholds: it could move a person from illness to health or from health to illness, from consciousness to altered states, from life toward death.
Medea’s identity as a priestess of Hecate was not a biographical detail added to her story. It was the explanation of her knowledge: she was trained within the cult of the goddess whose domain encompassed everything that pharmakeia could affect. Circe’s kinship with Hecate through their shared Titanic lineage served the same explanatory function. The Thessalian witches’ invocation of Hecate in their rituals placed their practice within the same divine authorization.
Hecate provided the theological framework that made the practitioners of pharmakeia comprehensible within the ancient Greek religious system. They were not operating outside divine sanction. They were operating within a specific divine domain, under the patronage of a specific goddess, using knowledge that the goddess’s domain made available to those sufficiently dedicated to its acquisition.
What the Plants Knew
The pharmacological basis of ancient Greek witchcraft deserves more attention than it usually receives, because it is the element that distinguishes the historical reality underlying the mythological tradition from the later European witch myth, which had no such basis.
The eastern Mediterranean landscape that Circe, Medea, and the Thessalian witches inhabited was one of the world’s richest environments for psychoactive and pharmacologically active plants. Datura, with its powerful hallucinogenic and delirious properties. Henbane, which in appropriate doses produced states of altered consciousness and at higher doses produced death. Mandrake, associated since antiquity with sleep, pain relief, and the boundary between waking and unconscious states. Hemlock, which killed Socrates and which the ancient Greek pharmacological tradition knew in detail. Belladonna, whose compounds affect heart rate, pupil dilation, and consciousness in ways that are dangerous and were understood to be dangerous.
A practitioner with detailed knowledge of these plants, their preparation, their appropriate dosages, and their interactions with other substances possessed a capability that was genuinely extraordinary within the context of a world that had no other means of producing comparable physiological effects. The transformations and compulsions and healings attributed to the witches of antiquity were not entirely metaphorical. Some of them were the documented effects of real compounds, administered by people who knew what they were doing.
Dioscorides, the first-century Greek physician whose De Materia Medica remained the foundational Western pharmacological text for fifteen centuries, compiled his knowledge from a tradition of plant-based medicine that ran continuously from the ancient Greek witchcraft tradition through the rational medicine of Hippocrates and his successors. The boundary between Medea’s preparations and the preparations described in Dioscorides is not a boundary between magic and medicine. It is a boundary between applications of the same knowledge that the social and religious context had authorized differently.
The Geography of the Practice
Each of the major figures in the ancient Greek witchcraft tradition is associated with a specific geographic location, and the locations are not chosen arbitrarily.
Circe’s island of Aeaea was placed at the western edge of the world in the Odyssey’s geography, somewhere in the Tyrrhenian Sea according to later identifications, though the specific location was never fixed with the precision that the Mediterranean coast allowed for. The western edge was the direction of the setting sun, of the approach of darkness, of the world that the living left when they died and that required special knowledge to navigate.
Medea’s Colchis was placed at the eastern edge, where the sun rose, where the oldest and most powerful magical traditions were imagined to originate. The Greeks who built the Medea myth were drawing on real knowledge of Colchis as a culturally and botanically distinct region from Greece itself, with plant species and ritual practices that were genuinely different from what the Greek heartland contained.
Thessaly’s reputation was geographic in a different sense: it was domestic, located within the recognized boundaries of Greece itself, which made its association with witchcraft simultaneously more immediate and more unsettling than the distant locations of Aeaea and Colchis. The witches of Thessaly were not safely remote. They were present in a Greek landscape that also contained the slopes of Olympus and the oracle at Delphi. Their practice occupied the same terrain as the most authoritative expressions of Olympian religion, which made the proximity a source of genuine cultural unease.
The witches of antiquity came from these places because the places were real, their plant life was real, and the knowledge of that plant life, accumulated over generations and preserved within traditions of female practice that the dominant culture could not fully control or comprehend, produced the historical basis for the mythological figures that the literary tradition then elaborated into the enduring forms that Circe and Medea retain.
The Tradition That Survived
The medieval European witch trial and its accompanying mythology of diabolical compact and sabbath meetings had almost no structural connection to the ancient Greek tradition of pharmakeia. The medieval witch was defined by her relationship to a supernatural adversary, her power derived from a pact rather than from knowledge. The ancient Greek pharmakis was defined by her knowledge and by the divine patronage of a goddess whose domain legitimized that knowledge within the Greek religious framework.
What survived the transition between the two traditions was not the structure but the figure: the woman of exceptional knowledge, living at the social margin, possessing capabilities that the structures of ordinary life could not authorize or accommodate. The medieval tradition stripped the knowledge out of the figure and replaced it with the compact. What remained was the danger, the independence, and the social anxiety that a woman operating outside the available categories had always produced.
Circe and Medea survived this transition as literary figures precisely because the texts that preserved them were too canonical to be fully overwritten. Homer and Euripides remained, and with them the witches who moved through their pages in full possession of real knowledge, applying it with the precision of people who understood what they were doing and why.
The most famous witches of antiquity came from the edges of the Greek world, from islands and kingdoms that the mapped world ran out of before it reached. They came from the plains of Thessaly, where the plants of the Pindus slopes were available to those who knew how to use them. They came from the cult of Hecate, whose domain of thresholds and transitions provided the theological framework within which the knowledge of pharmakeia made sense.
They came, above all, from the accumulated knowledge of plants and their effects, held by women who had no other form of authority available to them and who used what they knew with a precision that the world around them could only explain as magic.
It was not magic. It was knowledge. The two were indistinguishable from the outside, which is why the tradition called it both.
At Olympus Estate, Mythic Essays moves through the deeper currents of the Greek tradition, from the pharmakeia of Medea’s Colchis to the moon-drawing rituals of the Thessalian plain. The knowledge that the ancient world called magic has never entirely disappeared.
