In the fiction of J. R. R. Tolkien, Moria, also named Khazad-dûm, is an ancient subterranean complex in Middle-earth, comprising a vast labyrinthine network of tunnels, chambers, mines and halls under the Misty Mountains, with doors on both the western and the eastern sides of the mountain range. Moria is introduced in Tolkien's novel The Hobbit, and is a major scene of action in The Lord of the Rings.