Castle Alcázar of Segorbe
Spain
Castle Alcázar of Segorbe was an alcázar (palace or castle) located on the slopes of Sopeña in the town of Segorbe, in the Valencian Community of Spain. Very little remains of the original alcázar, but the large complex was a residence of lords, dukes and kings for over a millennium.
Palace data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).