What is the name of the magical map created by J.K. Rowling’s Hogwarts characters?

J.K. Rowling’s magical map is called the Marauder’s Map. It shows Hogwarts School of Witchcraft and Wizardry in detail, including passages and the moving names of people inside the castle.

The map was created by four Hogwarts students: James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew. They used the nicknames Prongs, Padfoot, Moony, and Wormtail, collectively calling themselves the Marauders. The map’s magical information reflects their experience exploring the school while Lupin was a werewolf.

Fred and George Weasley steal the map from Filch’s office and give it to Harry Potter. Harry uses it to navigate Hogwarts and later discovers that its displays can reveal hidden or unexpected visitors. The map’s insulting password response, “I solemnly swear that I am up to no good,” is one of its best-known features.