Castle of the Living Dead (Italian: Il Castello dei Morti Vivi, French: Le Chateau des Morts Vivants) is a 1964 horror film directed by Warren Kiefer. It was released in English under the title Crypt of Horror. It was Kiefer's first film as a director.

Since its release, a number of contradictory production histories concerning Castle of the Living Dead have surfaced, with the film's direction being variously attributed to Kiefer (who was credited with the alias "Lorenzo Sabatini" on Italian prints), Riccardo Freda, or Luciano Ricci (credited as "Herbert Wise"). Other mysteries include the extent of assistant director Michael Reeves' involvement in the production, and whether or not Mario Bava provided special effects for the film.