Description: Rectangular building with a single nave and an oriented semicircular chevet. It was built in two phases, as can be seen from the different types of brickwork, featuring masonry on the base and part of the side walls, perhaps corresponding to work carried out in the 11th century at the same time as the castle was built, and another type of masonry dating from the start of the 13th century. It is covered with a pointed barrel vault and the door is located on the western wall, with a semicircular arch opening with large voussoirs and extradoses decorated with balls.