In September 1666 a fire that started in a bakehouse burned the greater part of the City of London. The tactics available were buckets, hooks and gunpowder. The decision that mattered most was made hours late, by a man worried about who would pay for the houses he was being asked to pull down. What came out of the ashes was a building code, a court to settle rebuilding disputes, and a private fire service funded by insurance. All three still shape your fire protection.

What the record actually supports

Start with what is solid. The fire began in the early hours of Sunday 2 September 1666 at or beside Thomas Farriner’s bakehouse on Pudding Lane, and it burned into Wednesday 5 September. The Monument’s public history gives those dates. Pepys and Evelyn are the best known eyewitnesses, and Wenceslaus Hollar’s map of the burned area is the contemporary record of the extent.

The damage figures disagree. History.com gives 13,200 buildings destroyed, over 400 acres burned and about 100,000 left homeless. Londonist, in an August 2016 piece on the death toll, cites roughly 13,200 houses and 89 churches. London Remembers gives 87 churches. Other accounts put the homeless near 70,000 out of roughly 80,000 living inside the City, a different boundary. I am not going to average them. Take a figure from the London Museum or the National Archives with its basis attached.

One myth needs naming up front, because it got carved in stone. A French watchmaker named Robert Hubert confessed to starting the fire and was hanged, and the confession has long been regarded as false. London Remembers describes obvious flaws and impossibilities in his account. An inscription near Pudding Lane in 1681 blamed Catholic conspirators acting through Hubert, and the Monument carried the same charge until the nineteenth century. That was a political lie, and it killed a man.

A city built to burn

The fire behavior was not mysterious. It was the predictable output of fuel, geometry and weather. History.com describes cramped streets and timber framed structures built with pitch and tar, stables full of hay and straw, and cellars holding turpentine, lamp oil and coal. Add a months long drought, then a strong east wind, the variable that turned a bad building fire into a moving front.

The geometry is the part people skip, and it matters most to anyone in fire prevention. Jettied construction means each upper storey projects out beyond the one below. Two facing buildings sixteen feet apart at street level may be a few feet apart at the eaves. That closes the gap exactly where the fire is hottest. Radiant heat crosses it easily and flame contact is trivial. Once the upper storeys are burning, the street is not a break. It is a flue with buildings on both sides.

The hesitation at the top

The Lord Mayor of the City, Sir Thomas Bloodworth, was woken in the first hours and did not act. The line attributed to him, that a woman could put it out, appears in Pepys’s diary and is repeated in popular histories. Treat it as what it is, a remark reported by a man who was not in the room. What is not in dispute is that the fire went unattacked while the area involved was still small.

Why he hesitated is the interesting part, and it is not simply cowardice. Pulling down houses exposed whoever ordered it to claims from the owners. Standard accounts describe Bloodworth as unwilling to authorize large scale demolition without the owners present, with many absent and the ownership of rented buildings unclear. Historians still debate how much was liability and how much was misjudgment, and I would not call the motive settled. A commander uncertain of his authority hesitates.

The problem got solved by going over his head. Pepys carried the situation to Whitehall on Sunday and the King authorized demolition. Charles II put his brother James, Duke of York, in charge, and fire posts were set up around the fire with men and supplies assigned. That is a declaration unlocking a legal power, then a single operational commander and geographic divisions. What changed since is that we write the delegation down in advance.

Firebreaks by demolition

There was no fire service and no pressurized water. Parish equipment meant leather buckets, hand squirts, ladders and fire hooks, long poles used to pull a building’s timbers down. Against one burning house that worked often enough. Against a wind driven fire in dense fuel, the only tactic with physics behind it was to remove the fuel ahead of the front.

Removing fuel by hand is slow. Accounts consistently describe crews being overtaken, with the fire moving faster than men could pull buildings down. When hooks proved too slow, gunpowder was used. Northamptonshire Fire and Rescue Service, in its public history of the fire, credits the end of the fire to two things together, the east wind dying down and gunpowder used by the Tower garrison to create effective firebreaks. The wind is doing a great deal of work in that sentence. A break succeeds when the fire’s forward energy has already dropped enough for it to matter.

The demolitions had a second order effect that anyone who has run public information will recognize. The explosions were heard across a city that already suspected foreign attack, and Historic UK notes that the blasts fed rumors. To people who believed the Dutch or the French had set the fire, detonations were evidence. If you are going to do something loud in a frightened city, the message goes out with the decision, not after it.

The death toll nobody believes

The traditional figure is six deaths. The Monument’s public FAQ states there are six recorded deaths and adds that some historians argue the true number is higher, because the fire left no evidence and many died unaccounted for. Six is not how many people died. Six is what a seventeenth century record keeping system captured.

Understand that system. Deaths were tallied through parish records and the bills of mortality, which counted burials. A burial record requires a body, a parish and someone to report it. The fire burned across hundreds of acres in a city where the poor, the transient, lodgers and servants were least likely to be on a parish list at all. Londonist’s 2016 examination notes that Londoners lived in the ruins or in camps into the autumn. Deaths from exposure in October are not counted as fire deaths in any system.

Historians disagree about how much higher the real figure is, and that disagreement is worth naming rather than resolving. Londonist cites Neil Hanson, author of The Dreadful Judgement, and Adrian Tinniswood, author of By Permission of Heaven, as the studies examining indirect deaths. Hanson has argued publicly for a toll far above the traditional handful, in a quotation carried by History.com putting it at several hundred and possibly several thousand times the recorded figure. That is one historian’s estimate, contested by others, and it is not a count. Londonist also notes that the London Fire Brigade has said the number is unknown.

The lesson is not about 1666. A casualty count is the output of a counting system, and every such system has a population it does not see. A plan that captures people arriving by ambulance with a triage tag will undercount those who self transport and those who die at home a week later. Excess mortality studies exist because the direct count is always the smaller one.

The rebuilding acts and the first fire code

The legal response came fast, which is the most impressive thing about it. Parliament passed the Rebuilding of London Act, drawn up by the jurist Sir Matthew Hale, and it received royal assent in February 1667. It is cited in some places as the 1666 Act and in others as the 1667 Act, because the session and the assent date fall in different years. If you cite it, look up the statute text.

The substance is a recognizable building code. Historic UK summarizes the 1667 and 1670 acts as requiring brick or stone, banning jettied upper storeys and protruding signs, mandating party walls, and defining four classes of building keyed to the street they fronted, along with widened streets. Each provision answers an observed failure mode. Jetties closed the gap at the eaves, so jetties were banned. Timber carried the fire, so masonry was required. Adjoining structures shared their fire, so party walls were mandated.

A second legal problem gets less attention and mattered enormously to recovery. Thousands of buildings were held under leases, and somebody had to decide whether landlord or tenant paid to rebuild. Through the ordinary courts that would have left London a ruin for a generation. Parliament created a special judicature by act, with royal assent the same day in February 1667, to settle differences over houses burned or demolished. The Fire Court moved fast. The code prevents the next fire. The court is what lets the current one end.

Fire marks and the insurance brigades

Fire insurance as a business essentially begins here, although the dates do not agree. Britannica’s biography of Nicholas Barbon, a physician turned developer in the rebuilding, says his part in the work roused his interest in fire insurance and that he set up an office about 1680. The London Museum also dates the first company, the Fire Office, to 1680 under Barbon. The New York City Fire Museum’s page on fire marks dates it to 1667. I cannot reconcile those, and I will not pretend one away.

The fire mark solved a practical problem. It was a metal plate bearing the company’s emblem, often stamped with the policy number, fixed to the front of the insured building. The London Museum notes this mattered particularly before street numbering arrived in the 1760s. Insurers ran brigades because paying claims costs more than preventing them. The London Museum states that by 1690 one in ten London houses was insured.

Now the famous story, and it needs labeling as it is told. The popular version, that a brigade arrived, checked for its own fire mark and watched if the mark was absent, is disputed and probably wrong as a blanket claim. Research published on Tom Scott’s corrections page cites primary evidence that early brigades made little distinction between insured and uninsured property, including London Assurance orders in 1752 requiring turnout to all alarms of fire. The real point is narrower. As an account published by the Institute of Economic Affairs describes, the brigades answered to their employers and were not required to protect uninsured or public property. They usually helped. They did not owe you help.

What still runs on 1666

The consolidation explains where public fire service came from. The London Museum records an 1826 agreement among the Sun Fire Office, the Royal Exchange Assurance and the Phoenix Fire Office to combine their brigades under one superintendent. In 1833 the insurance brigades merged into the London Fire Engine Establishment under James Braidwood, still privately funded. Braidwood was killed at the Tooley Street fire in 1861, and legislation in the mid 1860s moved London’s fire protection to public hands.

Two inheritances are live in American practice. The building code is a suppression tactic executed years in advance, and it is the only one that scales. Insurance is still a primary enforcer of mitigation, because rating and premium schedules put a price on a community’s fire protection and water supply, and that price changes behavior in ways a fire marshal’s request does not. The funding question never closed either. Subscription arrangements still exist in parts of the rural United States, and a widely reported 2010 case in Tennessee, where a department did not extinguish a fire at a home outside its limits whose owner had not paid the fee, produced an argument a Londoner in 1700 would have recognized.

The last inheritance is command. The 1666 failure was not a failure of courage or equipment, though the equipment was hopeless. It was authority arriving late. The man on scene with the legal power to order property destroyed was not sure he could use it, and by the time someone above him settled it, the tactic that would have worked at two in the morning no longer worked at noon. Every delegation of authority and every pre scripted declaration exists because of that pattern. We have not solved it. We wrote it down.

Takeaways

• The fire began at or beside a bakehouse on Pudding Lane early on 2 September 1666 and burned into 5 September.
• Published damage figures disagree, running around 13,200 houses, 87 or 89 churches, over 400 acres, and 70,000 to 100,000 homeless depending on the source.
• Jettied timber construction put the fuel closest together at the eaves, where a fire is hottest, so the street stopped working as a separation.
• The Lord Mayor’s failure to order early demolition is best read as an authority and liability problem, which is why modern plans pre delegate authority.
• Firebreaks by demolition work only when finished ahead of the front, and accounts credit the fire’s end to gunpowder breaks and the east wind dropping.
• Six deaths is what parish burial records captured, not what happened, and historians argue for a far higher toll while the London Fire Brigade says it is unknown.
• The Rebuilding Acts of 1667 and 1670 produced a recognizable fire code, and a special court settled rebuilding disputes so recovery could proceed.
• Insurance funded brigades created organized firefighting, the claim that they routinely watched uninsured buildings burn is disputed, and a public brigade took about two centuries.