Torre do Castelo de Aguiar de Sousa

This tower is highly prestigious, not so much for the existing remains, but for its strategic location and the importance the castle held in the historical context of the Reconquista, as it was located on the defensive line of the territory, highly valued by the Asturian kings. It was attacked by Almanzor in 995, led a land in the process of territorial reorganization in the 11th century, and was also a powerful judicial district, one of the most affluent between the Douro and Minho rivers, accumulating great wealth, its territory extending from Porto to near Penafiel. The ruins reveal a castle from the first phase of Christian military construction, with the tower off-center in relation to the oval of the walled enclosure. It is part of the Romanesque Route of the Sousa Valley.