mythologyandhistory, 
Did you know that #Exeter #Cathedral has a #cat door?
The cathedral built in the 14th century, houses an #astronomical #clock.
The original clockwork was greased with animal fat, which attracted vermin.
To combat this, the #bishop allowed a cat to enter the clock room via a #hole in the door.
This hole is also believed to be the origin of the nursery rhyme “Hickory Dickory Dock” (…the mouse ran up the clock…).
