In 1518, a dancing plague broke out in Strasbourg where roughly 400 people danced uncontrollably for days on end, with city authorities responding by hiring musicians and opening a guild hall to keep the dancers moving, believing more dancing would cure them.
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What we found
Did 400 people really dance uncontrollably for weeks? Yes, in Strasbourg in 1518.
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Transcript
In 1518, hundreds of people in Strasbourg couldn't stop dancing — for weeks. It started with one woman dancing alone in the street. Within a month, roughly 400 people had joined her — all dancing uncontrollably, unable to stop. Some collapsed from exhaustion. Some reportedly died from heart failure and stroke after days without rest. The city authorities didn't lock them down. Instead, they hired professional musicians and opened a guild hall, genuinely believing that more dancing would sweat the affliction out. Historians and medical scholars today point to a condition called mass psychogenic illness — a real, documented phenomenon where stress and collective anxiety produce uncontrollable physical symptoms across a group. The 1518 Dancing Plague of Strasbourg remains one of the best-documented episodes in history, recorded in physician notes, sermons, and city council records that still survive today. Follow for a fact every day.
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