The chapel , built into the rampart itself, lies on the right-hand side of the courtyard. The side walls are hollowed out into great pointed arches with rib vaults and arch moldings which lighten the building whose only decoration is a molded string-course at the base of the arches. A stone mihrab placed against one of the lateral pillars serves to recall the Chapel was immediately converted into a mosque after the capture of Crac by the Sultan Beybars. On the same level as the chapel and the great hall, and communicating with the latter, a vast corridor a hundred and twenty meters long, down the western side of the fort links up with other rooms to the north and south. It is a marvelous construction with its vaulting coming right down to the ground.
Light comes in through apertures at regular intervals along the top of the vault.
Latrines were cut into its north wall. On the same level, but on the other side of the central tower a similar but smaller room housed the castle s stores of provisions which were considerable as they were calculated to sustain the garrison for five years. Enormous wine jars were found there, and the remains of an olive-press. It lies on the southern side of the courtyard and has a pointed vault which rests on massive square pillars. It housed kitchens, refectories and store rooms.