The Grand Staircase is a massive structure in Hogwarts Castle, mainly used to access each floor of the castle, including the dungeons. There are hundreds of Portraits covering the walls in this tower, some of which conceal secret passages to other areas within the school. The multiple staircases in the Grand Staircase lead from platform to platform and go as high as the seventh floor where they come to an end. The stairs also have a knack for moving around the staircase chamber, usually when a student is walking up one of them.
