The turriform (tower-shaped) building in the Talaiotic settlement of S’Illot is a monumental structure dating from the late Bronze Age (1200-900 BC), and is considered a predecessor of the later talaiots, with the typical circular or square floor plan. This building is the highest point on the site, and the best place to keep a watch on the surrounding area. Few turriform buildings have been excavated, so it is still hard to determine their function beyond the fact that, as central, monumental spaces they played a major role in the social life of the settlement’s inhabitants. In the case of S’Illot, the turriform building also contains access to the underground cavity beneath the site, which contains a store of fresh water that would have supplied the settlement.