Brilliant Marauders Map
Brilliant Prefects' Bathroom
This magical map of Hogwarts has changed hands several times since its creation. Originally owned by James Potter, it fell into the possession of Argus Filch. It was then ‘rescued’ by Fred and George Weasley, who used it for mischief, before eventually being gifted to Harry Potter. Only once was it ever used by someone truly ‘up to no good’ - Barty Crouch Junior, disguised as Mad Eye Moody, used it to monitor the goings on of the castle.