Marauder's Map

The Marauder's Map is a magical map from the Harry Potter continuum, made in during the Marauder Era. It was created by James Potter, Remus Lupin, Sirius Black, and Peter Pettigrew.

It is a map of Hogwarts which can show everyone who is within the boundaries, as well as the location of various hidden passageways.

Possession of the Marauder's Map by an original character in a fanfic can be considered a charge.