CASTILLO DE AYUB (R)
Fortress of Muslim origin, built in the 9th century. It is one of the five castles that surrounded Calatayud. Conquered in 1120 by Alfonso I of Aragon and dismantled in 1705 by order of Felipe V, was used in the wars of Independence and Carlists. It has two enclosures, with two octagonal towers of two floors, a quadrangular cube and two towers of greater height, one of them octagonal and square the other, all united by canvases of wall, with two doors of access to the enclosure.
For more information see your description at Castillos del Olvido