sentences:  He brought along the Italian engineer Giovanni Battista Antonelli, who has been considered the most renowned professional to practice in 16th century Cuba The works began by 1590 and went on slowly.In 1595 a hurricane severely damaged the fortress, among other reasons, due to the thinness of its walls that were then more solidly rebuilt.By 1602 there was such a delay in the construction work that the engineer decided to make the fortress into a keep holding some 10 to 12 artillery pieces.