The name of the monument refers to a legend according to which, around 1300, a fleet of Turks landed on the island shores, placing under siege Posada itself in order to conquer it due to hunger. The inhabitants of Posada, in order to mislead the invaders, gave the last remaining handful of beans to a pigeon, slightly injuring it; the animal fell in the Turks’ camp, who saw that its stomach was full of beans, therefore the attackers were led to overestimate the food resources of the islanders.
Today the castle only features the central Tower and the ruins of the city wall.