Hundreds of people danced themselves to death in Strasbourg in 1518
By Colin PetersonJuly 8, 2026
Where the evidence lands: Proven
That in the summer of 1518 in the free imperial city of Strasbourg, a woman known as Frau Troffea began an uncontrollable dancing fit that spread to dozens and then reportedly hundreds of townspeople, some of whom danced for days without rest until they collapsed, and that a number of them died of exhaustion, stroke, or heart attack before the episode subsided by early autumn.
Proven. The event itself is not in dispute: it is one of the best-documented mass phenomena of the pre-modern era, recorded in municipal records, physician notes, and multiple chronicles. What remains genuinely debated is the cause: stress-induced mass psychogenic illness is the leading explanation, not ergot poisoning.
Believed by: Accepted by historians as a real event; the cause is actively debated in peer-reviewed scholarship, not by the public at large
The full story
The woman who could not stop
In the second week of July 1518, in the free imperial city of Strasbourg, a woman whom chroniclers recorded as Frau Troffea stepped into a narrow cobbled street near her home and began to dance. There was no music. By the accounts that survive, she did not appear to be enjoying herself, and she did not seem to be able to stop. She danced for hours that first day, rested, and returned to it the next, continuing, by most tellings, for four to six days before the authorities intervened.
What happened next is the reason this episode is remembered at all. Within a week, chroniclers report, more than thirty other Strasbourgeois had been seized by the same compulsion. Within a month, estimates in the surviving sources climb toward 400 people. Whatever the precise number (and pre-modern crowd counts are never exact) contemporaries agreed that a genuinely large share of the city was dancing uncontrollably, in public, for an extended stretch of the summer. Some dancers, according to the record, kept going until their feet swelled and bled inside their shoes; some, per later accounts, collapsed and died of exhaustion, stroke, or heart failure.
This did not happen in a rumor mill or a single traveler's diary. It is documented from several independent angles: the Strasbourg municipal and council archives, which record the city's own escalating response; notes from the physicians the council consulted; and multiple chronicles written by people living in or near the city, including later compilations by the Strasbourg jurist Johann Schilter and the architect Daniel Specklin, along with the physician and alchemist Paracelsus, who passed through the region several years afterward and wrote about the outbreak in his medical text Opus Paramirum. That breadth of independent, contemporaneous documentation is why historians treat the dancing plague of 1518 as one of the best-attested mass phenomena of the period, whatever they conclude about its cause.
The city's response is itself part of the record and shows how seriously officials took it. Acting on the medical opinion of the day (that the afflicted were suffering from “hot blood” that needed to be danced out of the body) the council cleared guild halls, erected wooden stages in the grain and horse markets, and paid for musicians to keep the dancers moving until the fit passed. When the outbreak seemed only to grow under this treatment, the council reversed itself entirely: it tore down the stages, banned public dancing and music by decree, and organized wagons to carry the afflicted to a shrine of Saint Vitus at Saverne, where priests placed them before a wooden carving of the saint, fitted them with small crosses and red shoes, and anointed them with holy water and oil. By early autumn, contemporary accounts describe the mania fading out.
A curse the mind was primed to believe
The strongest modern account of what actually drove the dancing comes from the medical historian John Waller, who examined the Strasbourg records in depth and laid out his case in two peer-reviewed articles in The Lancet, “In a spin: the mysterious dancing epidemic of 1518” (2008) and “A forgotten plague: making sense of dancing mania” (2009), followed by a full-length history, A Time to Dance, a Time to Die. His argument is that the epidemic was a genuine case of mass psychogenic illness, sometimes called mass hysteria: a real, physically expressed affliction with a psychological rather than toxicological or supernatural cause.
Waller's case leans on documented context rather than conjecture. Strasbourg in 1518 was a city under extraordinary strain. The region had just come through a run of failed harvests and famine, and residents were living alongsidesmallpox and syphilis, on top of the ordinary burdens of taxation and disease that marked the period. That is exactly the kind of sustained, high fear, high deprivation environment in which documented psychogenic illnesses tend to cluster, and Strasbourg was not experiencing it in the abstract; its residents were living it day to day.
The second half of Waller's argument is cultural, and it is the part that explains why the stress expressed itself specifically as dancing. Along the Rhine, there was a real, widely shared belief that the wrath of Saint Vitus could curse a person into uncontrollable dancing, a belief the city's own response ratified when it sent the afflicted to a shrine built around exactly that idea. Waller's contention is that this shared “trance-inducing framework” gave frightened, exhausted people a specific, culturally legible form for their distress to take, and that watching others succumb to it in public reinforced the pattern in a self-sustaining loop, what he terms a kind of psychic contagion. On this account, the dancers were not faking, and they were not being poisoned. They were experiencing a real, involuntary, and at times fatal affliction, produced by the mind under genuine duress and given its specific shape by a belief the entire community already held.
That shared belief did not take hold in Strasbourg for the first time in 1518. The wider Rhine region had lived through comparable outbreaks before: a large dancing mania that began in Aachen in June 1374 spread to Cologne, Metz, Strasbourg, and other towns across the region, and Strasbourg experienced a smaller dancing mania of its own in 1418, a full century before Frau Troffea ever stepped into the street. The historian H. C. Erik Midelfort, surveying madness in sixteenth-century Germany, argues that these recurring outbreaks of Saint Vitus's dance were “created and structured” by a standing local and regional tradition rather than appearing at random each time. Nor is a psychological reading a modern reinterpretation built to sound tidy in hindsight: cataloguing the surviving chronicles of these outbreaks in the first systematic history of the phenomenon, the physician-historian Justus Hecker concluded as early as 1832 that, whatever opportunistic imitation crept in from onlookers, “the morbid delusion itself” predominated, a psychological verdict reached decades before germ theory or modern psychiatry existed to frame it that way.
Why the older poisoning theory does not fit
For a long time, the default explanation reached for was ergotism, poisoning from a hallucinogenic fungus, Claviceps purpurea, that grows on damp rye and was a real hazard of medieval and early modern grain supplies. It is an intuitive theory: a toxin explains bizarre, involuntary movement more simply than an appeal to “stress” does, and 1518 was a wet, famine-stressed year in which contaminated rye is entirely plausible.
The trouble is what ergot actually does to the body. Ergotism constricts blood flow to the extremities, and its hallmark presentations are either convulsive spasms and hallucinations or, in its other common form, gangrene from restricted circulation, not sustained, coordinated, hours-long ambulatory dancing. Waller and other historians researching the episode have argued that a toxin severe enough to compel involuntary movement in hundreds of people would be expected to produce a different and more physically incapacitating clinical picture than the one the Strasbourg sources describe, in which afflicted people danced, rather than convulsed in place, for days at a time.
The recurrence pattern points the same way. Waller and other historians researching the outbreaks have also noted that they cluster overwhelmingly along the Rhine and Moselle river corridor across nearly a century and a half (Aachen in 1374, Strasbourg itself in both 1418 and 1518, and other towns in between) linked by trade, travel, and a shared regional culture, but not by a shared harvest, climate, or grain supply. A contaminated-rye epidemic would be expected to track wet growing seasons and local grain stocks, which varied considerably across that much time and territory; a belief in a dancing curse, carried along the same roads and rivers that carried people and news, tracks the actual geography of the outbreaks considerably better.
None of this means every detail in the surviving chronicles is precise. The death toll in particular was never tallied by any surviving official record, and figures like “fifteen deaths a day” come from later retellings rather than a contemporaneous count, a gap historians are honest about rather than papering over. But on the specific question of cause, the psychogenic account fits the documented symptoms and the documented context (famine, disease, and a shared St. Vitus belief) more closely than the poisoning theory does, which is why it is the explanation most historians researching the episode now favor.
Why a dancing plague is easy to believe and hard to forget
Part of why this story has lasted five centuries is that it does not need exaggerating to be remarkable; it only needs repeating. People genuinely danced, in public, for days, against their own will, in a major European city, and the city's own council spent real money building stages and hiring musicians in response. That is true on the driest possible reading of the record. The versions that circulate today lean on the most vivid specifics (red shoes, a saint's curse, the claim of hundreds dead) because specificity feels like proof, even where the underlying number was never actually counted.
The other reason it endures is that a single dramatic cause is easier to hold onto than a diffuse one. “They were poisoned” or “they were cursed” are complete stories with one villain. “A population already broken by famine and disease found itself convinced, through several channels at once, that dancing under those conditions was doom” is not a single villain at all: it is several ordinary, interacting pressures, which is a harder thing to tell around a fire and a harder thing to fear.
It also matters that the affliction had a name and a shape already waiting for it. Nobody in 1518 needed to invent the idea that dancing could be a curse: Saint Vitus's wrath was already part of the regional imagination, discussed from pulpits and carved into local shrines, well before Frau Troffea ever stepped into the street. A frightened body reaching for the nearest culturally available explanation for its own distress is not a modern insight confined to psychiatry: it is exactly what the Strasbourg council itself acted on when it sent the afflicted to Saverne for the saint's intercession, after its own physicians' remedy had failed to help.
A real epidemic, a debated cause
On whether the dancing plague of 1518 happened, the verdict is straightforward: Proven. Independent municipal records, physician notes, and multiple chronicles agree that a large-scale, involuntary dancing outbreak struck Strasbourg that summer, that it grew for weeks despite the city's interventions, and that officials treated it as a serious public crisis worth considerable civic resources to end.
What is not settled with the same certainty is the exact scale (the death toll specifically was never formally tallied and likely grew in the retelling) and, more substantively, the cause. There the weight of the documented evidence favors John Waller's peer-reviewed case for mass psychogenic illness, produced by genuine famine and disease stress acting through a shared St. Vitus belief system, over the older ergotism theory, which fits the recorded symptoms poorly. The dancing was real, the suffering behind it was real, and the most honest explanation on offer is not a poison or a curse, but a population in genuine crisis finding, and then reinforcing, one specific and devastating way for that crisis to show itself in the body.
What's still unexplained
- Mass psychogenic illness is the explanation the modern peer-reviewed literature (and this entry) favor over ergotism, but it is built from chronicle descriptions, physician notes, and city records, not from clinically examining a single living dancer. Ergotism remains a minority position among specialists, and a few researchers have floated other explanations entirely, including the possibility that some participants in the wider dancing-mania tradition belonged to unorthodox religious movements performing deliberate ritual dance rather than experiencing involuntary compulsion. None of these accounts can be tested against the dancers themselves five centuries on, which is the actual reason the question remains open rather than settled.
- The figure most often repeated in popular retellings (roughly fifteen deaths a day at the outbreak's peak) comes from John Waller's own synthesis of later, non-contemporaneous accounts, not from any surviving Strasbourg tally. No document produced by the city itself in 1518 records a specific death count or confirms one occurred at all, so the real toll, and how much of the popularly cited scale is period fact versus later embellishment, cannot be checked against a primary source.
- Strasbourg was not new to this affliction: the city had its own smaller dancing mania in 1418, and sat within a Rhine-Moselle corridor that saw recurring outbreaks for nearly a century and a half before 1518. That history explains why the region had a standing template for the behavior to follow, but historians have not settled why this particular convergence of famine, disease, and taxation tipped into an outbreak on the scale of 1518 rather than a smaller, more contained episode like the city's own 1418 mania or the many other hard years the region endured across those same centuries.
- The council's physicians, working from Galenic 'hot blood' theory, prescribed more dancing (guild halls, stages, hired musicians) as the cure, then reversed course within weeks and banned dancing outright once the numbers kept climbing. Whether the stages and music actually made the outbreak worse, as the council concluded at the time and many modern retellings repeat, or the mania would have grown on roughly the same trajectory regardless of the treatment, is a causal question the surviving records describe only from the outside: nobody at the time or since has been able to run the outbreak twice.
Point by point
The claim: This sounds too strange to be a real historical event. Surely it's been exaggerated or invented after the fact.
What the record shows: It is one of the most thoroughly attested mass phenomena of the period. It appears independently in Strasbourg municipal and council records, in physician notes from the time, and in multiple chronicles written by people in a position to know: not a single late legend, but a documented civic crisis that the city itself spent weeks and real money responding to.
The claim: Hundreds of people danced uncontrollably for days, some until they collapsed and died.
What the record shows: Contemporary chroniclers do describe a mania that spread to dozens within days and, by some accounts, hundreds within a month, with dancers exhausting themselves to the point of swollen, bleeding feet and, per some sources, fatal collapse. The scale most likely grew somewhat in the retelling, and the exact death count was never tallied in surviving records, but the core event (sustained, involuntary, and dangerous dancing) is not seriously disputed by historians.
The claim: The city's own leaders responded by hiring musicians and building stages for the dancers, which only makes sense if they believed something serious and real was happening.
What the record shows: True, and it is a striking, well-documented fact. The council acted on the physicians' prevailing theory that the mania was a physical excess ('hot blood') that needed to be danced out of the body. When the strategy seemed to worsen the outbreak, the council abandoned it within weeks, banned dancing outright, and turned to religious pilgrimage instead, a real, escalating civic response to what officials experienced as a genuine emergency.
The claim: It must have been poisoning from tainted bread, since a toxin explains uncontrollable movement better than 'stress' does.
What the record shows: Ergotism was the leading folk explanation for centuries, but it fits the specific symptoms poorly: ergot poisoning constricts blood flow and produces convulsions, gangrene, and hallucinations, not the sustained, ambulatory, hours-long dancing described in Strasbourg. Most historians researching the episode consider a psychological rather than toxicological cause better supported by the documented symptoms.
Timeline
- 14 Jul 1518A woman recorded by chroniclers as Frau Troffea steps into a narrow street in Strasbourg and begins to dance without music or apparent cause, continuing for hours and, by most accounts, for several days.
- Late Jul 1518Within a week, more than thirty other residents have reportedly joined the dancing, unable to stop on their own; city physicians and the Strasbourg council take notice.
- Aug 1518The council, on medical advice that the dancers needed to 'dance it out,' clears guild halls and grain and horse markets, builds wooden stages, and hires musicians. The strategy appears to backfire, and chroniclers report the number of afflicted climbing toward the hundreds.
- Aug 1518The council reverses course: it tears down the stages, bans public music and dancing, and organizes wagons to send the afflicted to the shrine of Saint Vitus at Saverne, where priests perform rites involving red shoes, small crosses, and holy water.
- Early Sep 1518Contemporary accounts describe the mania subsiding through the autumn as the pilgrimages and the ban take hold, bringing the episode to an end.
- 2008–2009Medical historian John Waller publishes a series of peer-reviewed analyses in The Lancet, followed by a full-length history, arguing the episode was a stress-induced mass psychogenic event rather than poisoning.
Proven. The event itself is not in dispute: it is one of the best-documented mass phenomena of the pre-modern era, recorded in municipal records, physician notes, and multiple chronicles. What remains genuinely debated is the cause: stress-induced mass psychogenic illness is the leading explanation, not ergot poisoning.
Reviewed by Colin Peterson · Last reviewed July 9, 2026 · How we rate
Common questions
Is Dancing Plague of 1518 true?
Proven. The event itself is not in dispute: it is one of the best-documented mass phenomena of the pre-modern era, recorded in municipal records, physician notes, and multiple chronicles. What remains genuinely debated is the cause: stress-induced mass psychogenic illness is the leading explanation, not ergot poisoning.
What is Dancing Plague of 1518?
In July 1518, a woman in Strasbourg began dancing in the street and could not stop. Within a month, by contemporary accounts, hundreds of others had joined her, some dancing for days until they collapsed, and chroniclers reported that a number died. The episode itself is thoroughly documented. What historians still argue over is why it h…
What does the evidence show?
It is one of the most thoroughly attested mass phenomena of the period. It appears independently in Strasbourg municipal and council records, in physician notes from the time, and in multiple chronicles written by people in a position to know: not a single late legend, but a documented civic crisis that the city itself spent weeks and re…
Why do people believe it?
The dancing itself is not folklore: it is recorded in the city's own administrative and medical records, so treating the whole episode as a myth would mean dismissing genuine period documentation, which is precisely the kind of source this project weighs most heavily.
What is still unresolved?
Mass psychogenic illness is the explanation the modern peer-reviewed literature (and this entry) favor over ergotism, but it is built from chronicle descriptions, physician notes, and city records, not from clinically examining a single living dancer. Ergotism remains a minority position among specialists, and a few researchers have floa…
Sources
- 1.In a spin: the mysterious dancing epidemic of 1518, John C. Waller, The Lancet, vol. 373, issue 9463 (2008)
- 2.A forgotten plague: making sense of dancing mania, John C. Waller, The Lancet, vol. 373, issue 9664, pp. 624–625 (2009)
- 3.A Time to Dance, a Time to Die: The Extraordinary Story of the Dancing Plague of 1518, John Waller (Icon Books) (2009)
- 4.Opus Paramirum (contemporary medical account of the outbreak, written c. 1526), Paracelsus (Theophrastus von Hohenheim) (1526)
- 5.Strasbourg municipal and council records of 1518 (as compiled and analyzed in period chronicles by Johann Schilter and Daniel Specklin), Strasbourg Municipal Archives (1518)
- 6.The Dancing Plague of 1518, The Public Domain Review
- 7.Divine Punishment or Disease? Medieval and Early Modern Approaches to the 1518 Strasbourg Dancing Plague, Lynneth J. Miller, Dance Research, vol. 35, no. 2, pp. 149–164 (2017)
- 8.A History of Madness in Sixteenth-Century Germany, H. C. Erik Midelfort (Stanford University Press) (1999)
- 9.The Dancing Mania (in The Black Death and The Dancing Mania, trans. B. G. Babington, ed. Henry Morley), Justus F. C. Hecker (Cassell & Company, 1888 ed.) (1832)
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