 In its lower part, the tower contains vestiges of the beginning of the heavy walls of alabaster ashlar bond masonry, and continues upwards with plank lining of simple plaster and lime concrete, which is a thinner substance for reaching greater heights.The exterior does not reflect the division of the five internal floors and appears as an enormous prism, broken by narrow embrasures.Access to the interior was gained through a small door at such height that it was only possible to enter by means of a portable ladder.