The demons of the middle ages: When hell takes its place in stone and parchment

Why did these nightmarish images, so far removed from the serenity we now associate with medieval art, invade churches, manuscripts, and even everyday objects? And how did artists, often anonymous, transform fear into an aesthetic as powerful as it was enduring?

01When stone begins to scream

Imagine for a moment that you are a 12th-century peasant, illiterate, entering a Romanesque cathedral for the first time. The thick walls, the dark stained glass—everything contributes to an oppressive atmosphere. Then suddenly, your gaze is drawn to the tympanum: a Christ in majesty, surrounded by angels and... demons. The latter are not relegated to some discreet corner. They occupy a central place, almost as important as that of the elect. Their presence is not incidental. It is a brutal reminder: salvation is not guaranteed, and hell awaits those who stray from the righteous path.

Medieval sculptors did not merely represent monstrous creatures. They gave them an almost palpable life. In Autun, for example, Gislebertus’s demons seem ready to leap out of the stone. Their bodies are stretched, their limbs disproportionate, their faces twisted in expressions of hatred or mockery. Some have goat legs, others membranous wings, still others forked tails that coil around their victims. These details are not gratuitous. They reflect a true taxonomy of evil, where each physical trait corresponds to a vice or a temptation.

Take the demon with the scale. In medieval tradition, it embodies deceit. While the archangel Michael weighs souls with fairness, this demon cheats, adding extra weights to cast sinners into hell. His sneering smile, his clawed fingers—everything about him reeks of malice. And if you look closely, you will notice that some of the damned are trying to cling to him, as if hoping to escape their fate. An illusion, of course. Once the demon has seized you, there is no turning back.

02The book that whispers horrors

If the tympana of cathedrals strike with their monumentality, medieval manuscripts fascinate with their intimacy. In the workshop of an illuminator, hidden from prying eyes, scenes of refined cruelty unfold. Take the Hours of Jeanne d’Évreux, a small prayer book made in the 14th century for the queen of France. Its pages, barely larger than a hand, teem with macabre details. Here, a demon with a dog’s head blows into a trumpet to wake the dead. There, another, half-man, half-insect, tortures a sinner with a pitchfork. Further on, a creature with bat wings embraces a woman, as if to drag her into the abyss.

What is striking in these illuminations is their almost surgical precision. The artists did not content themselves with drawing generic monsters. They invented hybrid creatures, blending human, animal, and even plant elements. A demon might have the body of a man, the legs of a goat, the wings of a bird, and the tail of a serpent. These combinations were not random. They reflected a worldview in which evil was a perversion of divine creation.

Colors, too, play a crucial role. Red, obtained from cinnabar or vermilion, symbolizes blood, passion, and damnation. Black, often made with ivory ink or charcoal, evokes darkness and death. Green, meanwhile, is associated with rot and corruption. Gold, used sparingly, highlights the eyes, claws, or weapons of demons, giving them an almost supernatural glow.

But the most unsettling aspect of these manuscripts lies in the margins. These empty spaces, where illuminators allowed themselves a disconcerting creative freedom. In the Luttrell Psalter, for example, one finds demons playing bagpipes, riding snails, or engaging in obscene dances. These images, both grotesque and comical, seem to defy the established order. Some historians see them as a form of social satire, where demons embody the vices of the powerful. Others read them as an attempt to dispel fear through laughter. Whatever the case, these margins form a world apart, where horror rubs shoulders with the absurd, and the sacred mingles with the profane.

03The devil is in the details

To understand the richness of medieval demonic iconography, one must delve into its symbols. Each attribute, each posture, each color tells a story.

Take horns. In antiquity, they were associated with pagan deities like Pan or Cernunnos. With the Christianization of Europe, these gods were demonized, and their horns became the hallmark of Satan. In the Hours of Jeanne d’Évreux, the devil is often depicted with goat horns, a reminder of his pagan origins and bestial nature.

Claws, meanwhile, symbolize predation. They serve as a reminder that the demon is a hunter, always on the lookout for new prey. In the Winchester Psalter, a demon with sharp claws gouges out a sinner’s eyes, a metaphor for spiritual blindness.

Wings, on the other hand, are an inheritance from fallen angels. But while angels have the wings of eagles or doves, demons are often given bat wings, an animal associated with night and death. In the Apocalypse of Angers, a monumental tapestry from the late 14th century, demons fly over the damned, their membranous wings casting threatening shadows over tormented souls.

And what of the hybrids? These half-man, half-beast, half-man, half-insect creatures are a medieval invention. They embody the idea that sin distorts the soul, rendering it monstrous. In the Beatus of Liébana, a 10th-century Spanish manuscript, demons are depicted with human bodies but animal heads: lions for wrath, pigs for gluttony, serpents for envy. Each vice has its own demon, and each demon is a caricature of humanity.

04When art becomes a weapon

If medieval demons fascinate us today, it is also because they were far more than mere decorations. They were tools of propaganda, serving a Church seeking to assert its power.

In the Middle Ages, the fear of hell was a daily reality. The sermons of priests, the tales of pilgrims, the images in churches—everything contributed to sustaining this terror. And demons were its ambassadors. Their presence in places of worship was not innocent. It served to remind the faithful that salvation was not guaranteed, and that the slightest sin could plunge them into eternal flames.

But demons were not only instruments of terror. They were also mirrors held up to medieval society. In the margins of manuscripts, for example, one often finds demons mimicking the behavior of the powerful. A demon might wear a crown, another hold a scepter, a third ride a warhorse. These images, both comical and subversive, seem to say: beware, those who hold power are no better than demons.

Demons also served to demonize the Church’s enemies. Heretics, Jews, Muslims—all were depicted as minions of Satan. In the Cantigas de Santa María, a collection of medieval Spanish songs, Muslims are often associated with demons, a way to justify the Reconquista. Similarly, in representations of the Inquisition, heretics are often shown in the company of demons, as if to prove they had made a pact with the devil.

05The laughing demon

Yet, despite their terrifying appearance, medieval demons are not always devoid of humor. In the margins of manuscripts, one often finds scenes where demons engage in antics. In the Macclesfield Psalter, for example, a demon plays the bagpipes while another dances with a nun. In the Smithfield Decretals, a demon tries to milk a cow, while another is scolded by an angel.

These images, both grotesque and comical, seem to defy the gravity of the religious message. Some historians see them as a form of catharsis, a way to dispel fear through laughter. Others read them as social criticism, where demons embody the flaws of the powerful. Whatever the case, these margins form a world apart, where horror rubs shoulders with the absurd, and the sacred mingles with the profane.

And then there are the demons who seem almost sympathetic. In the Romance of the Rose, a 13th-century allegorical poem, the demon Beelzebub is depicted as a cunning and manipulative being, but also as an almost endearing character. He is not merely an incarnation of evil, but a complex figure, capable of guile and seduction.

06The legacy of demons

Today, medieval demons continue to haunt our imagination. We find them in horror films, video games, and television series. But what is striking is how their iconography has endured across the centuries without losing its power.

Take The Exorcist, William Friedkin’s 1973 film. The demon Pazuzu, who possesses young Regan, is directly inspired by medieval representations of Satan. His bulging eyes, his distorted mouth, his jerky movements—everything about him recalls the demons of Romanesque tympana. Similarly, in Sleepy Hollow, Tim Burton’s Headless Horseman is a reinterpretation of medieval demons, with their taste for decapitation and their penchant for the macabre.

Video games, too, have drawn from this legacy. In Dark Souls, the Gaping Dragon—a creature with multiple mouths and misshapen limbs—is directly inspired by medieval depictions of hell. Likewise, in Diablo, the demons that populate dungeons are reinterpretations of the hybrid creatures from medieval manuscripts.

Even fantasy literature has embraced these images. In The Name of the Rose by Umberto Eco, the demons that haunt the abbey are described with a precision reminiscent of medieval illuminations. And in Harry Potter, the Dementors—faceless creatures that suck out souls—owe much to medieval representations of demons.

07Why do these images still fascinate us?

Perhaps because they touch on something universal: the fear of the unknown, the dread of damnation, the desire to give form to evil. Medieval demons are not just creatures of nightmare. They are also mirrors held up to our own humanity.

They remind us that evil is not an abstraction, but a tangible reality, capable of taking a thousand forms. They show us that the boundary between good and evil is often blurred, and that the devil, as Baudelaire said, knows how to disguise himself as an angel of light.

And then there is that strange, almost hypnotic beauty that emanates from these images. Despite their ugliness, despite their cruelty, medieval demons exert an irresistible fascination over us. Perhaps because they allow us to confront our fears, to look them in the face, and to tame them through art.

So the next time you come across a demon in a manuscript or on a tympanum, do not look away. Face it squarely. For it has something to tell you. And that something may well be you.