Item from Harry Potter by J.K. Rowling
A magical parchment showing every person, passage, room, and secret tunnel in Hogwarts in real time, created by Moony, Wormtail, Padfoot, and Prongs — activated by the phrase 'I solemnly swear that I am up to no good.'
Also known as: the Marauder's Map, Marauder's Map, the Map