11 Weird Historical Facts That Sound Made Up — But Are Disturbingly Well-Documented

There’s a category of historical fact that lives in the uncanny valley between meme and footnote. They sound invented. They are not. We pulled the most-cited weird historical facts most people don’t know and traced each one back to a primary source.

Mackenzie King, Canada’s longest-serving prime minister, ran the country for 21 years and held séances in his spare time. He believed his dead mother and his Irish terrier Pat were giving him political advice. The diaries are public. They are extensive.

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The 1325 War of the Bucket between Modena and Bologna left an estimated 2,000 dead. The bucket — the actual wooden bucket — is still on display in Modena’s Torre della Ghirlandina.

In 1518, a dancing plague hit Strasbourg. Roughly 400 people danced for days, some until they collapsed. Physicians at the time prescribed more dancing. It did not help.

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Pope Gregory IX declared war on cats in the 1230s. The resulting cat cull is one of several reasons historians give for why the Black Plague spread so efficiently a century later: fewer cats meant more rats.

Our test for inclusion is simple. If a fact appears in three independent academic sources and one primary document, it makes the list. Everything else gets cut, no matter how fun.