https://about-history.com/pope-gregory-ix/
Pope Gregory IX - Crusades, Death And Black Cats
Apr 17, 2026 - Pope Gregory IX had an amazing life and was responsible for a number of decrees that shaped European history.
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https://museumhack.com/black-cats-black-death/
Did Pope Gregory IX Order A Medieval Purge of Black Cats That Caused the Black Death?
Feb 26, 2020 - Look, everyone knows cats are in league with Satan. But did medieval Europeans really kill them all for it? And what's that got to do with the black death?
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https://www.learnaboutnature.com/mammals/cats/do-black-cats-really-cause-bad-luck/
Do Black Cats Really Cause Bad Luck? - Learn About Nature
Mar 1, 2022 - I wouldn’t trade my black cats for all the white kitties in the world.
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