What Was the Dancing Plague?
In July 1518, a woman named Troffea stepped into the street in Strasbourg, France, and began to dance. She danced for days. Within a month, 400 people joined her. They danced without stopping — day and night. Their feet bled. Some collapsed from exhaustion. An estimated 15-50 people died from heart attacks, strokes, and sheer exhaustion. No one could stop them. No one could explain it. The Dancing Plague of 1518 remains one of the most bizarre and unexplained epidemics in history.
History
The Beginning (July 14, 1518)
The Dancing Plague began on July 14, 1518, when a woman named Troffea (whose full name has not been recorded) walked into the narrow street of Rue de l’Outre in Strasbourg and began to dance. She danced for hours, then days. She could not stop. Bystanders watched in horror as she twisted, twirled, and stomped her feet against the cobblestones.
Strasbourg in 1518 was a city in crisis. A severe famine had struck the region, killing thousands. Smallpox and other diseases were rampant. The city’s population was malnourished, stressed, and desperate. In this environment of misery, Troffea’s dancing took on a life of its own.
The Epidemic Spreads (July-August 1518)
The dancing spread rapidly. By July 25, 34 people had joined Troffea. By August 2, the number had swelled to 100. By August 18, approximately 400 people were dancing in the streets of Strasbourg.
The dancers could not stop. They danced for hours, days, and weeks. Their feet bled. They collapsed from exhaustion. Some suffered heart attacks and strokes. An estimated 15-50 people died from the physical toll of the dancing.
The city authorities were bewildered. They called in doctors, priests, and city officials to address the crisis. But no one could explain what was happening, and no one could stop it.
The City’s Response
The city authorities initially tried to encourage the dancing. They believed that the dancers needed to “dance it out” — that the dancing was a form of divine punishment or possession that would eventually run its course. They cleared a guild hall for the dancers and hired musicians to accompany them.
This strategy backfired. The music and the space only encouraged more people to join. The dancing intensified.
Realizing their mistake, the city authorities reversed course. They banned public dancing. They closed the guild halls. They sent the dancers to a mountaintop shrine dedicated to Saint Vitus — a saint believed to have the power to curse people with uncontrollable dancing.
The End of the Plague (September 1518)
The Dancing Plague subsided in September 1518. The exact reason for its end is unknown. Some historians believe that the dancers eventually died or were incapacitated. Others believe that the city’s ban on dancing and the closure of the guild halls eventually broke the cycle.
The Dancing Plague was not entirely unique. There are records of similar outbreaks in Europe throughout the Middle Ages. However, the 1518 outbreak in Strasbourg was the largest and best-documented.
“They danced without stopping — day and night. Their feet bled. Some fell dead. But they kept dancing.” — Chronicler, Strasbourg, 1518
The Mystery
What Caused the Dancing Plague?
The cause of the Dancing Plague has been debated for over 500 years. Several theories have been proposed:
Mass Hysteria: The most widely accepted theory is that the Dancing Plague was a case of mass hysteria — a psychological phenomenon in which a group of people exhibit similar symptoms without a physical cause. The stress of the famine, disease, and poverty may have triggered a psychological response that manifested as uncontrollable dancing.
Ergot Poisoning: Another theory suggests that the dancers were poisoned by ergot — a fungus that grows on rye and other grains. Ergot contains chemicals similar to LSD, and it can cause hallucinations, muscle spasms, and convulsions. However, ergot poisoning typically causes more serious symptoms — gangrene, seizures, and death — and it doesn’t explain why the symptoms were limited to dancing.
Religious Ritual: Some historians believe that the Dancing Plague was a form of religious ritual — a way of appeasing Saint Vitus, who was believed to have the power to curse people with uncontrollable dancing. This theory is supported by the fact that the dancers were eventually sent to a shrine dedicated to Saint Vitus.
Psychogenic Movement Disorder: Modern medical researchers have proposed that the Dancing Plague may have been a form of psychogenic movement disorder — a condition in which psychological stress manifests as involuntary movement. This theory is supported by the fact that the dancing was triggered by stress and stopped when the stress was alleviated.
The Role of Stress
The Dancing Plague occurred during a time of extreme stress in Strasbourg. The famine, disease, and poverty had created a desperate population. The dancing may have been a physical manifestation of this stress — a way for the body to express what the mind could not.
This theory is supported by the fact that the Dancing Plague was most intense in the poorest neighborhoods of Strasbourg, where the effects of the famine and disease were most severe.
Why Dancing?
The choice of dancing as the symptom of mass hysteria is unusual. Other forms of mass hysteria have manifested as laughing, crying, fainting, or screaming. The Dancing Plague is unique in its use of dancing.
Some researchers have proposed that dancing was chosen because it was a familiar activity in Strasbourg’s culture. Dancing was a common form of entertainment and social interaction. When the body needed to express stress, it chose the most familiar and accessible activity.
Evidence and Investigations
Contemporary Accounts
The Dancing Plague was well-documented by contemporary sources:
- City records from Strasbourg document the outbreak and the city’s response
- Chronicles from the period describe the dancers, the deaths, and the confusion
- Church records document the religious ceremonies and interventions
- Medical accounts from the period describe the symptoms and treatments
These sources provide a detailed picture of the outbreak, though they are often contradictory and reflect the biases of the authors.
Modern Research
Modern researchers have studied the Dancing Plague using a variety of approaches:
- Historical analysis — examining the contemporary accounts and city records
- Medical analysis — comparing the symptoms to known medical conditions
- Psychological analysis — applying theories of mass hysteria and psychogenic illness
- Cultural analysis — examining the role of dance and religion in Strasbourg’s culture
Despite these efforts, the cause of the Dancing Plague remains uncertain.
“The Dancing Plague was a phenomenon that defied explanation in 1518, and it continues to defy explanation today. We can describe what happened, but we cannot fully explain why.” — Historian, 2018
What Do You Think?
The Dancing Plague of 1518 is a reminder that the human body and mind are capable of extraordinary and inexplicable behavior. Four hundred people danced without stopping — some to death — and no one could explain why or stop them.
Was it mass hysteria? Ergot poisoning? A religious curse? Or something else entirely? The evidence is fragmentary, and the mystery endures.
The Dancing Plague is a testament to the power of the mind over the body — and a reminder that some mysteries may never be fully understood.
Summary
- The Dancing Plague of 1518 caused approximately 400 people in Strasbourg, France, to dance uncontrollably for weeks
- It began with one woman — Troffea — and spread rapidly through the city
- An estimated 15-50 people died from exhaustion, heart attacks, and strokes
- Theories include mass hysteria, ergot poisoning, and religious ritual
- Bottom line: The Dancing Plague is one of the most bizarre and unexplained epidemics in history, a phenomenon that continues to mystify researchers
See also: The Oakville Blobs — Mysterious Gelatinous Rain · The Phantom Barber of Pascagoula