The Palacio de Donlebún represents a distinctive example of Asturian noble architecture in Castropol, featuring either four towers or elaborate 16th to 19th-century construction styles depending on the specific structure. The most renowned version, situated near Barres, is a U-shaped palace built in 1711 around a central courtyard, with a northwest tower dating to the 16th century and southeast sections from the 18th century. These protected heritage sites showcase the regional architectural preferences of Asturian aristocracy and their evolving tastes across multiple centuries of development.
