The Marauder’s Map is the magical map that reveals Hogwarts’ passages and occupants in the Harry Potter book series.
Fred and George Weasley give the map to Harry in Harry Potter and the Prisoner of Azkaban. They had taken it from Filch’s office during their first year and later recognized that Harry could make good use of it. The map displays the castle and its grounds, including hidden routes and the names of people moving through them.
The map was created by the four Marauders: James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew. Their school nicknames were Prongs, Padfoot, Moony, and Wormtail. Harry uses the map to navigate Hogwarts, but it also exposes dangers, such as Peter Pettigrew’s presence near Ron. It is different from a normal floor plan because its enchantment tracks living people and responds to spoken commands.