A city already on its knees

Strasbourg in 1518 was a free city within the Holy Roman Empire. On paper, it was busy and independent. On the ground, it had been worn down by one bad season after another, with little space between them to recover.

Harvests had failed repeatedly. Grain prices had climbed beyond the reach of ordinary households, and bread, the most basic thing a family could ask of a season, had become something to worry over rather than expect.

Disease did not wait its turn either. Syphilis, still new and terrifying to European populations, was spreading. Smallpox was another familiar threat. Taxes, tithes and obligations continued even when the harvest failed. Historian John Waller’s study of the surviving record places the outbreak inside this atmosphere of hunger, sickness, religious fear and prolonged distress.

None of this explains what followed on its own. But it sets the table. A population does not always need one great catastrophe to break. Sometimes it only needs years of smaller ones, stacked without relief.

Frau Troffea steps into the street

Then, in July of that year, a woman known to history as Frau Troffea walked into a street in Strasbourg and began to dance.

No music played. No festival called for it. She simply began, and by the accounts that survive, she did not stop. She danced until exhaustion forced her down, rested, then started again. This continued for days.

We have no reliable account of what was moving through Frau Troffea’s mind that morning. What we know is that the dancing appeared involuntary, caused injury and alarmed the people around her. It would not have looked like joy. The records do not describe it that way.

The others join her

Within a week, more than thirty people were reportedly dancing too. Nobody forced them out of their homes. Yet something pulled them into the same behaviour, and this is where the historical record has to surrender part of the story to uncertainty. No chronicler wrote down what any individual dancer thought as they stepped into the street.

What we can say with more confidence is that Strasbourg already knew stories about a dancing curse associated with Saint Vitus. Watching a neighbour suffer through something that matched this belief would not have looked like an oddity to dismiss. It could have looked like a warning fulfilling itself.

Stress does not always ask permission before it moves through the body. Once frightened people saw others sway, twitch and dance, the line between watching and joining may have become thinner than anyone standing there could recognise.

What the dance looked like

Here the story needs restraint because it is easy to let the drama run ahead of the evidence.

Physicians, civic documents and chronicles describe people dancing for long periods without proper rest. Through July and into August, the number grew. Some accounts place the affected group in the hundreds, perhaps as many as four hundred. The exact count is uncertain, but the episode itself is not a modern invention. Municipal orders and contemporary descriptions confirm that Strasbourg’s authorities faced a genuine public crisis.

The dancers did not look like people enjoying themselves. The movement was described as something endured rather than chosen. No instrument started it. No feast day called for it. For weeks, part of Strasbourg moved as if answering a command nobody could name.

The city tries to help and makes it worse

Strasbourg’s physicians diagnosed the affliction as “hot blood”, an imbalance they believed had to be worked out of the body. The diagnosis was recognisable medicine by the standards of the time.

Following that logic, the city council cleared spaces for dancing, arranged a stage and hired musicians and professional dancers. The theory was that continued movement would burn the illness out of the afflicted. Both Encyclopaedia Britannica’s account and historian-led reviews of the episode describe this extraordinary civic response.

It did the opposite. Music, crowds and public spectacle exposed more people to the behaviour. The cure was feeding the crisis.

When the strategy failed, the council reversed itself. Public dancing and music were restricted. Some of the afflicted were taken to a shrine dedicated to Saint Vitus for prayer and ritual, in the hope that faith would answer where medicine had not.

Some chronicles report that dancers died from exhaustion or other medical collapse. The number is one of the least secure parts of the story. A later account even claimed that fifteen people died a day for a short period, but the surviving evidence does not allow a reliable total. It is safer to say that the dancing caused injury, exhaustion and serious civic alarm than to repeat a dramatic death count as settled fact.

By early September, roughly two months after Frau Troffea entered the street, the episode had subsided. It ended as strangely as it began, without an explanation anyone could prove.

What may have been happening

The leading modern interpretation is mass psychogenic illness: genuine, involuntary symptoms shaped by collective stress, cultural expectations and social exposure rather than by an infectious pathogen.

This does not mean the dancers were pretending. Psychogenic illness can produce real physical symptoms. The British Psychological Society’s historical review argues that distress and a shared fear of Saint Vitus gave the Strasbourg episode both its force and its particular form.

Strasbourg carried the conditions that make this explanation plausible. There was hunger, disease, economic pressure and a belief system that told frightened people what divine punishment might look like. Each new dancer made that belief more visible to everybody watching.

Other theories exist. Ergot poisoning is the best known. Ergot is a fungus that can contaminate rye and cause convulsions, hallucinations and restricted blood flow. Yet that pattern does not comfortably explain sustained dancing across many people over several weeks. Waller’s peer-reviewed analysis rejects ergot as an adequate explanation, while a Lancet historical essay places the episode within a longer history of dancing manias shaped by distress and religious belief.

What Strasbourg suffered was not, in the end, a dance. It was a population’s distress becoming visible in public, in one of the few languages that its frightened imagination already understood.

If it happened here

I cannot read this story without placing it in Lagos.

We are not short of pressure. The hardship here is not medieval, but it is real. Food prices rise faster than many salaries. Transport takes its daily share of money and patience. The simple business of getting from one end of the city to another can drain something out of a person before the workday has begun.

Now imagine it. A hot afternoon on Third Mainland Bridge. Traffic is already crawling, as it often does. Somewhere in the middle of that gridlock, a handful of people step out of their cars or buses and begin to dance.

Not the dancing you would see at a party. Something else. Something that does not stop when the people around them ask it to.

By evening, it has reached Ikorodu Road. More bodies are moving in the heat, more lanes have disappeared, and traffic that was already unbearable is now genuinely impassable. Phones come out before any real help does. The clips travel faster than an ambulance ever could.

The government calls it a medical situation first, the way any government should. Doctors are dispatched. A statement is drafted. Perhaps a task force is named before the week is over.

But this is Lagos. Eventually there is a bridge that will not clear, a road that will not move and a public that has already decided this cannot possibly be an accident. Someone insists it is spiritual. Someone else insists it was orchestrated. A microphone finds its way to a politician before it finds its way to a psychiatrist.

Then comes the shift from ambulance to army truck, from a medical question to a security one. That is where I will leave this story, because it is often where our own stories tend to go.

You already know how to imagine the rest.