Did hundreds of people really dance uncontrollably in 1518?

Yes — Strasbourg's own council notes, doctors' reports and sermons document the 1518 dancing plague. Historians' leading explanation is stress-induced mass psychogenic illness after years of famine and disease.

Yes — this one is documented fact, not legend. In July 1518, in Strasbourg, a woman named Frau Troffea began dancing wildly in the street with no music. Within days, dozens had joined her; within a month, the dancing mania — called choreomania — had swept up somewhere between 50 and 400 people.

It is recorded in Strasbourg’s city council notes, doctors’ reports, religious sermons, and later chronicles. The dancers moved against their will for days on end — sweating, convulsing, bleeding into their shoes — while baffled officials hired musicians and built stages, believing the afflicted needed to “dance it out.” Modern historians’ leading explanation is stress-induced mass psychogenic illness: the city had endured famine, disease, and crushing poverty, a psychological powder keg waiting for a spark. One honest caveat: the famous claim of 15 deaths per day comes from later sources.

Contemporary records don’t support a death count, and historians say the true toll is unknown.