In Harry Potter and the Goblet of Fire, Hogwarts is in Oxford. The corridors where everyone seems to be sporting ‘Potter stinks’ badges, and the quad in which Mad-Eye Moody turns Malfoy into a ferret, are the cloisters of New College, Holywell Street. It’s in the richly-vaulted Divinity School of Oxford University’s famous Bodleian Library that Professor McGonagall teaches Ron to waltz ready for the Yule Ball.