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The internal structures of the castle date back to the prehistoric Castro culture, and was further developed under the reign of Sancho I of Portugal. In 1229, Sancho II of Portugal granted the settlement a Charter,[1] notably creating a free street market which helped develop the village economically, and likely establishing a stronghold at this time due to its strategic position in defending the Riba-Côa border.[3] A second wall was built during the reign of Denis of Portugal, though due to the Alcanizes Treaty which reestablished the borders, the site soon lost its strategic potential.[3]
