
Torre de Fullola is a striking thirteenth-century cylindrical watchtower rising approximately 16 meters in a valley center between the sierra of las Molas and the Mola pass, roughly 12 kilometers northeast of Tortosa in Baix Ebre. Constructed with unworked stone arranged in careful courses, the tower features a 4.5-meter diameter with walls one meter thick and an elevated doorway five meters above ground fitted with a monolithic lintel and three south-facing loopholes for surveillance and defense. The tower anchored a medieval settlement established by royal charter in 1208 when Ramon de Montcada granted settlement rights to Pere Nebot for the castle and territory of la Fullola. By 1342, the thriving settlement had acquired its own coat of arms through Tortosa's ownership, demonstrating the town's importance in regional commerce. Today, the ruins of this medieval settlement include the remarkable tower, a nearby church, and vegetation-covered residential foundations, offering compelling evidence of Tartagon medieval frontier life and territorial administration.