Marauder's Map, Harry Potter Books Wiki

The Marauder's Map is a wizarding parchment which shows the location of everything and everyone in Hogwarts Castle, including secret passageways. It is very powerful and is not fooled by disguises. It does not include locations that the inventors failed to find like the Chamber of Secrets, and it does not include unplottable locations. It appears throughout the Harry Potter book series. The parchment is plain and ragged until a person taps it using a wand and says the words: "I solemnly swear th

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