The superstition that black cats bring bad luck traces primarily to medieval Europe, where the Catholic Church linked cats to heresy and devil worship starting in the 1230s. But the story is more complicated than a single origin point. Black cats have been feared, worshipped, and considered lucky depending on the century and the culture. The superstition most people know today is really a layered belief built over about 800 years of European religious politics, witch trials, and psychological reinforcement.
Ancient Egypt Revered Cats, Not Feared Them
The earliest well-documented human relationship with cats was the opposite of superstitious fear. In ancient Egypt, cats were among the most iconic animals in art and culture. Egyptians admired felines for what they saw as a dual nature: grace and gentle care combined with aggression, swiftness, and danger. Gods who shared those qualities were depicted with feline features.
The best-known feline deity, Bastet, was initially portrayed as a lioness before taking on the image of a domestic cat or cat-headed woman around 2000 BCE. Egyptians offered inscribed cat statues to Bastet, asking for health, children, and protection. They also mummified cats by the thousands as offerings. Cats were associated with the sun, and many protective daughters of the sun god carried leonine qualities. In this context, a cat of any color was a sacred creature linked to divine protection, not a harbinger of misfortune.
The Church Tied Cats to Devil Worship
The shift began in 1233, when Pope Gregory IX issued a papal document called Vox in Rama. The document described alleged rituals performed by a heretical sect in Germany called the Luciferians. Among the claims, largely extracted through torture, were descriptions of demon worship involving a black cat. The confessions portrayed the cat as a figure that appeared during satanic ceremonies.
This was not a direct order to kill cats, as popular retellings sometimes suggest, but its impact was significant. It gave official Church authority to the idea that cats, particularly black ones, were connected to the devil. That association stuck. Over the following centuries, as the Church intensified its efforts against heresy across Europe, cats became symbols of the occult in the popular imagination. A black cat crossing your path wasn’t just an animal going about its day. It was potentially a sign of evil nearby.
Witch Trials Made It Worse
The connection between black cats and bad luck solidified during the witch trial era of the 1500s and 1600s. In England, Elizabeth I passed a statute against “witchcraft and enchantments” in 1563, opening the floodgates for prosecution. During these trials, prosecutors would find the accused living with small household pets, especially cats, and argued these animals shared a supernatural bond with the accused women. Trial records described these pets as “demons” or “devils.”
The earliest surviving pamphlet from a witchcraft trial, published in 1566, introduced the concept of the “familiar,” an animal servant that carried out a witch’s evil bidding. The pamphlet told the story of Elizabeth Francis and her familiar: a cat literally named Satan. Elizabeth supposedly offered her blood to the cat, and in return it carried out her wishes. The animal could even shapeshift, transforming from cat to toad to dog. This trial set a precedent. The idea of the witch’s cat became a powerful propaganda tool, particularly among Puritans, and the image of a black cat as a witch’s companion entered European folklore permanently.
Some accused witches even claimed their animals were carrying out evil on their behalf, likely under pressure from interrogators who expected exactly that confession. The feedback loop between accusation and confession embedded the cat-witch connection deeper into public consciousness with every new trial.
Not Every Culture Sees Black Cats as Unlucky
The “black cats are bad luck” belief is largely a Western European export, and even within Europe it wasn’t universal. In parts of Britain and Celtic folklore, black cats were sometimes considered fairy beings or shape-shifters with magical properties. Some stories held that a black cat arriving at your home brought prosperity and protection.
In Japan, the tradition is inverted entirely. Black cats are considered protective talismans. The famous beckoning cat figurine, the maneki-neko, comes in different colors with different meanings: white for good luck and business, red for health, and black specifically to ward off evil spirits, misfortune, and protect the family. One origin story for the maneki-neko involves a military commander named Dokan Ota during the Muromachi period (roughly the 1400s) who, lost after a battle, followed a black cat’s beckoning to a temple. He survived and won his next engagement. In this telling, a black cat saved a man’s life.
These contrasting beliefs highlight that there’s nothing inherent about a black cat’s color that generates fear. The superstition is a product of specific European religious and political history.
Why the Belief Persists
Once a superstition takes hold, human psychology keeps it alive. Research into the cognitive mechanisms behind superstitious thinking shows that people tend to overweight events that seem to confirm a pattern while ignoring events that don’t. If you believe black cats bring bad luck and something goes wrong after seeing one, you remember it. The dozens of times nothing happened don’t register.
Studies have also demonstrated that superstitious people are more prone to perceiving control or causation where none exists. In experiments, participants rated a moderately positive causal relationship between their own actions and random outcomes, essentially seeing connections that weren’t there. This “illusion of causality” is stronger in people who already hold superstitious beliefs, creating a self-reinforcing cycle.
Real Consequences for Real Cats
The superstition isn’t just a quirky cultural relic. It has measurable effects on animal welfare. A study analyzing cat outcomes at an urban U.S. shelter found that black cats had the highest euthanasia rate (74.6%) and the lowest adoption rate (10.0%) of any coat color. White cats, by contrast, had the lowest euthanasia rate (63.0%) and the highest adoption rate (18.8%). Brown and gray cats fell in the middle, suggesting a graduated effect where darker coats correlated with worse outcomes.
There’s also a persistent belief that black cats face extra danger around Halloween, but the data tells a more nuanced story. When researchers analyzed a subsample of over 1,200 entirely black cats, their October adoption percentages were comparable to or lower than most other months. Black cats actually had higher adoption rates in January, February, March, and December. The Halloween effect appears to be less about a spike in danger and more about chronically low adoption year-round, with the holiday simply drawing attention to an ongoing problem.
Eight centuries after a papal document first linked black cats to demonic rituals, and nearly 500 years after a cat named Satan appeared in a witch trial pamphlet, the superstition continues to shape how people treat living animals. The belief has outlasted the Church’s campaign against heresy, the witch trial era, and any rational basis it never had to begin with.