Palacio Príncipe de Viana in Sangüesa, Navarra, served as a royal residence and seat of power during Navarre's medieval kingdom. Originally constructed in the 13th century and substantially renovated in the 16th century, this Gothic fortified palace hosted numerous Courts of the Kingdom and royal stays. The austere stonework building features a central body with two stories flanked by crenellated towers, with southern façade entrances and double rectangular windows. After restoration in 1960, it was converted into the municipal library. The palace remains a landmark symbol of Sangüesa's historical importance as a royal center in northern Spain.
