400 People Danced Until They Died
In1518,awomaninStrasbourgstarteddancinginthestreetandcouldn'tstop.Withinamonth,400peoplehadjoinedher.Somedanceduntiltheirheartsgaveout.
It Started With One Woman
In July 1518, Strasbourg was a city on edge. A series of harsh winters and blistering summers had devastated crops. Smallpox and syphilis were ravaging the population. Families were starving.
Into this context stepped Frau Troffea. On a hot July day, she walked into a narrow alley and began to dance. No music, no partner, no apparent reason. She simply could not stop moving.
Her husband begged her to stop. Neighbours watched in confusion, then alarm. She danced through the night, her shoes wearing through, her feet swelling and cracking. By the third day, she had collapsed from exhaustion — but when she regained consciousness, she started dancing again.
The Contagion Spreads
Within a week, 34 more people had joined the involuntary dance. Within a month, the number reached approximately 400. The afflicted danced with expressions of terror and agony, not joy. Many begged for help as their bodies continued moving against their will.
They danced with looks of utter terror on their faces. This was not celebration. It was compulsion.
The Strasbourg city council took the extraordinary step of consulting local physicians. The doctors ruled out astrological and supernatural causes and declared the plague a "natural disease" caused by "hot blood." Their prescription: more dancing.
The Cure That Wasn't
The council hired professional musicians. They opened two guildhalls and converted a grain market into a dance floor. They even built a wooden stage. The logic was that the afflicted needed to dance continuously until the fever broke — like sweating out a cold.
The city literally paid musicians to play faster music, hoping to accelerate the dancers toward exhaustion and recovery.
It made things dramatically worse. The music seemed to draw more people into the dancing. The death toll climbed — historical records suggest as many as 15 people died per day at the peak, from strokes, heart attacks, and exhaustion.
The End
By September, the dancing had mostly stopped. The surviving afflicted were taken to a mountaintop shrine dedicated to Saint Vitus, the patron saint of dancers and epileptics. There, they were given small crosses, red shoes, and prayers. Whether through time, ritual, or simply burning through every susceptible person, the plague ended.
The leading modern theory is mass psychogenic illness — a stress-induced trance state triggered by the extreme hardship of 1518 Strasbourg. But this theory can't explain why the "illness" manifested specifically as dancing, or why it lasted so long.
Strasbourg's chroniclers recorded the event in detail, and their accounts have been corroborated by physician notes, cathedral sermons, and city council minutes. Whatever happened in 1518, it really happened.
The historical record
What we actually know from primary sources — city council minutes, physician notes, and cathedral records from 1518 Strasbourg.
But could a fungus on rye bread really make you dance?
The ergot theory
Some researchers believe ergot — a fungus that grows on grain and produces LSD-like compounds — may have caused the dancing. The evidence is surprisingly compelling, and surprisingly flawed.
The strangest part is what happened at the shrine.
Mass psychogenic illness
Historian John Waller argues the dancing plague was a mass psychogenic event — a stress-induced trance state in a population pushed past its breaking point.
What you now know
- Frau Troffea danced for nearly a week straight before others joined — the contagion was gradual, not instant
- Physicians diagnosed "hot blood" and prescribed more dancing, which dramatically worsened the outbreak
- At the peak, roughly 15 people per day died from strokes, heart attacks, and exhaustion