ObjectsArtifact
Mirror of Erised
The Mirror of Erised shows the deepest desire of the person standing before it, not the truth of the room. Harry sees his parents. Dumbledore moves the mirror and later uses it to hide the Philosopher’s Stone, which can be taken only by someone who wants to find the Stone and not use it.

First mention
Harry Potter and the Philosopher's StoneChapter: The Mirror of Erised
Harry finds the mirror in an empty classroom while walking the castle at night under the Invisibility Cloak.