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"This 14th century door at Exeter Cathedral, UK, is thought to be the oldest existing cat flap
A cat was paid a penny each week, to keep down the rats and mice in the north tower, and a cat flap was cut into the door below the astronomical clock to allow the cat to carry out its duties.
Records of payments were entered in the Cathedral archives from 1305 to 1467, the penny a week being enough to buy food to supplement a heavy diet of rodents."
True haha. Here's a post with more info - I take it the original wording from the Mastodon post I quoted was just being cheeky about the cat technically being on the payroll. One supposes that the cat's human aide took the money on behalf of their illustrious master ;)