Why the cat drew suspicion
Cats have lived alongside people for thousands of years, yet never became workers. Dogs herd, guard, and come when called. A cat comes and goes on its own, hunts at night, and belongs to its owner only as much as it chooses. To a village, it was not a helper but a neighbor with business of its own.
Then add vision. Behind a cat's retina is a reflective layer - the tapetum. Light passes through the retina twice: a cat needs about 6 times less light than you do, and its eyes shine back by the fire. A black cat is the first to disappear at dusk: its outline melts away, while two glints remain. It appears the same way - suddenly and right beside you.
Night in medieval Europe was not neutral time: darkness was seen as someone else's territory, and anything that moved confidently through it was explained through evil spirits. Cats also prowled around any house with grain - including the home of a lonely old woman, already suspected of witchcraft even without cats.
- Night animal
- Glowing eyes
- Rumor of a witch
- Bad omen
How the black cat entered church records
In 1233, Pope Gregory IX sent Germany a letter, "Vox in Rama": it described a ritual of heretics in which participants kissed a black cat. This is often used to infer mass cat killings across Europe and even the plague that followed - but the letter did not order cats killed, and historians find no trace of such a campaign. What it did do was give the link between "black cat" and evil an official, high-profile text.
Witch trials of the 16th-17th centuries reinforced it. In English cases, an accused woman was thought to have a "familiar" - an animal through which she supposedly acted - and court records often named a cat. By the 18th century, the trials had faded away, but the omen lived on separately: crosses your path - bad luck.
Yet the very same cat means the opposite in another country. In Britain, a black cat crossing your path is a good sign, and in port cities people kept one at home so a sailor would return from a voyage. In Japan, a black cat is considered protection from misfortune, not its cause. And in some German beliefs, it is not the encounter itself that matters, but the direction in which the cat crossed the road.
The same cat, opposite conclusions - so it is not about the cat. The omen rests on memory: if your day goes badly after an encounter, you connect the two and remember it. But there is nothing to recall from the hundred times nothing happened: no event occurred for memory to hold onto.
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Sources
- Pope Gregory IX's letter "Vox in Rama" (1233)
- works on the history of English witch trials
- descriptions of the tapetum in veterinary ophthalmology