Some portraits are used to conceal the entrance of a room or passageway. For example, the Fat Lady's portrait covers the entrance to the Gryffindor common room, and she can swing the portrait open when given the correct password or close to prevent entry. In "Harry Potter and the Deathly Hallows", there is a portrait of Ariana Dumbledore in the Room of Requirement that conceals a secret passageway to the Hog's Head. There is also a painting of a large fruit bowl in front of the Hogwarts kitchen, which will swing open if the pear is tickled to reveal a hidden door.