Castillo de la Zuda

Castillo de la Zuda is a medieval fortress located in Borja, province of Zaragoza, Aragón, standing atop a hill that overlooks the town. Of Muslim origin, the castle was captured and incorporated into Christian Castilian defenses following the conquest of 1124 by Alfonso I, after which it served as a stronghold against rival Christian kingdoms. The fortress features a rectangular floor plan adapted to its hillside location, constructed primarily from clay and gypsum rocky platforms with stone masonry facing, and includes several rectangular defensive towers connected by protective walls. The castle remains in a progressively ruined state yet maintains sufficient structural integrity to convey its former defensive power. Designated as a Good of Cultural Interest under Aragonese law, the site offers free public access and represents important medieval Iberian military heritage.