 This sandstone (Rodeno), as megaliths, as ashlar, or as masonry walls settled with lime mortars or gypsum, is the mainly used material in the construction of the walls on this fortress.The wood was used to a lesser extent and always in beams and putlogs.The natural and intricate terrain secured the defense of the east and north flanks, and for that reason is why the Keep Tower (Torre del Homenaje) is erected in this area.