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The history of the chastity belt, from medieval myth to the modern cage

Were chastity belts real? As medieval objects, almost certainly not. The picture of a knight riding off to the Crusades with the key round his neck is a story the 18th and 19th centuries told about the Middle Ages, and the belts once shown in museums as proof have mostly turned out to be 19th-century fakes. Real chastity devices did exist, though, and they're stranger than the legend: Victorian doctors used locking rings and appliances to stop masturbation, a US patent for one was granted in 1911, and the modern male chastity cage was only born in the late 1990s. Here's the history, myth and all. For the device itself today, see our guide to male chastity.

A metaphor before it was an object

The phrase is older than any belt. Latin writers spoke of a cingulum castitatis, a girdle of chastity, from the early Middle Ages: the Italian magazine Focus traces it through Gregory the Great, Alcuin, Bernard of Clairvaux and Boccaccio, always as a symbol of spiritual purity, never as a lockable piece of iron. Medieval stories played with the idea too. In Marie de France's 12th-century tale Guigemar, two lovers seal their faithfulness with a symbolic knot and belt that only the other can undo. It's a pledge, not a padlock, and it's the woman who asks for it.

The drawing from 1405

The earliest known image of a chastity belt comes from a German engineer, Konrad Kyeser, in his military treatise Bellifortis of 1405. Among the siege engines and weapons is a drawing of an iron garment with a caption that translates as "these are hard iron breeches of Florentine women which are closed at the front". Nothing else from the period backs it up. The writer Massimo Polidoro argued in the Skeptical Inquirer in 2011 that Kyeser's reference was meant as humour or irony, and the historian Albrecht Classen suspects the same: a joke slipped into a book of war machines.

That single drawing carried an extraordinary weight for the next few centuries. Its caption also explains why the classic belt design is still called the Florentine pattern today.

The crusader story

The most famous version of the myth, the crusader locking up his wife before leaving for the Holy Land, has no evidence behind it at all. Wikipedia sums up the scholarship: there's no credible evidence of chastity belts before the 15th century, which is more than a hundred years after the last crusade to the Middle East. A Spanish gynaecologist quoted by the newspaper El Mostrador in 2016 added the practical objection: an iron belt worn for months would cause wounds and infections that would likely kill the wearer before her husband returned. Yet the story survives, even in modern sales copy. A 2023 US patent for a chastity device repeats it as history.

How the myth was built

The legend grew in stages, each one adding a little more iron to the story.

• 16th-century satire. Satirical engravings, possibly by Sebald Beham, showed belts as a joke about jealous husbands or as a symbol of prostitution.
• Enlightenment scorn. Diderot's Encyclopédie described the device and Voltaire wrote about it, and a culture keen to cast the Middle Ages as dark and cruel found the belt a perfect emblem.
• Victorian collectors. Classen's 2007 book, The Medieval Chastity Belt: A Myth-Making Process, argues the myth proliferated as a by-product of the 19th-century fascination with medieval instruments of torture. Collectors wanted belts, so belts appeared.

Museums got caught up in it. El Mostrador reported that the British Museum showed a belt as medieval from 1846 until it was found to be a fake. At the Musée de Cluny in Paris, a belt said to have belonged to Catherine de' Medici was judged a 19th-century forgery in a 1990 review, according to Focus. In 1889 an Austrian collector, Anton Pachinger, reported a belt from a 16th-century grave at Linz, but no burial record was ever found and the belt was lost after the First World War. Wikipedia notes that most belts once displayed as medieval have since been removed, because many historians date them to the 19th century.

The real devices of the 19th century

The irony is that genuine chastity devices arrived exactly when the myth peaked, and for a medical reason. Around 1760 the Swiss physician Samuel-Auguste Tissot popularised the idea that masturbation caused serious illness, describing it, in the Science Museum's summary, as "more dreadful than smallpox". For more than a century doctors and inventors took him seriously.

The results are in museum collections now. The Science Museum in London holds a jugum penis, a "spermatorrhoea ring" used in Britain between about 1880 and 1920: a jagged nickel-plated steel ring fitted to the base of the penis with a screw or clip. Similar gadgets were prescribed to women. In the United States, Jonas Edward Heyser of Philadelphia filed a patent for a "surgical appliance" on 19 January 1910, granted on 20 June 1911 as patent 995,600. It was a metal plate with pockets for the genitals, locked on with bands, padlocks and leg chains, designed, in its own words, to "absolutely prevent any attempt on the part of the patient to masturbate". Patents in the same vein kept appearing into the early 1930s. Other Victorian belts were sold to women for travel or for protection against assault, and some were advertised for fidelity.

Medicine has long since changed its mind. As the Science Museum puts it, medical practitioners now agree masturbation has no harmful side effects.

From Tollyboy to the CB-2000

The erotic chastity belt is a 20th-century creation. Wikipedia credits Hal Higginbottom's Tollyboy designs of 1956 as the ancestor of most modern belts. Time magazine ran a story on the belt maker David Renwick in May 1969, and in 1971 the firm Hugessen of Halstead, in Essex, won tax-exempt status by arguing that its belts were birth-control devices; it went bankrupt in 1974. Steel belts remained bespoke, made to measure and expensive.

The cage changed everything. In the late 1990s Frank and Doris Miller designed the plastic CB-2000 and set up A.L. Enterprises in Las Vegas, according to a 2005 report in The Tyee. The company applied to trademark the CB-3000 name on 16 August 2005, and a patent for the design was granted on 25 August 2009. Cheap, light and anonymous to order, the plastic cage turned chastity from a niche of custom metalwork into a mass hobby, and later 3D printing and mass-produced copies widened it again. By 2024 Slate counted 327,000 members in Reddit's chastity community and 23,000 in the one devoted to Locktober.

How a chastity belt works

A traditional belt follows what Wikipedia calls the Florentine pattern: a band around the waist or hips and a shield that runs between the legs, locked so the wearer can't take it off without the key. Men's belts add a tube for the penis under the shield. A cage is the smaller modern variant, a ring behind the scrotum joined to a tube, and it's what most people mean today when they say chastity. Our guide to chastity cage types covers the materials and locks, and the sizing guide explains the fit.

Why the myth won't die

Part of it is simply a good story, and a flattering one for modern kink: it gives a recent hobby a grand medieval ancestry. But the true history is more interesting. The device that really was forced on people was a medical one, built on bad science and imposed on patients. The chastity of today is the opposite: chosen, negotiated and unlocked whenever either person needs it. That difference is the whole point, and it's why the best place to see chastity now isn't a museum. It's the strip at the top of this page, where keyholders, teasers and denial specialists are live.