Albarracin Castle is located on top of a hill with very good views of the town. It was also called the Castle of Don Jacobo. The castle has an irregular plan that adapts itself to the terrain. The castle was the center of the Taifa Kingdom founded by Hudail Ibn Razin that became independent from the Moorish Kingdom of Cordoba in 1012. The Berber tribe of the Banu Razin used this fortress. In 1104 the town was taken over by the Almoravides. In 1147 the town was conquered by the Christians under the Rey Lobo of Murcia and became part of the Kingdom of Aragon. The castle has 11 towers that are circular in form and open to the interior of the castle. The castle has an area of 3400 square meters.

El Alcázar de Albarracín es un castillo y yacimiento arqueológico de época medieval ubicado dentro del casco histórico de la localidad de Albarracín, en la provincia de Teruel (España). Desde el punto de vista de la protección del patrimonio histórico español, está considerado como BIC (Bien de Interés Cultural) (fue declarado Monumento histórico-artístico junto con el resto de la muralla, perteneciente al Tesoro Artístico Nacional mediante decreto de 3 de junio de 1931​) y forma parte del Conjunto Histórico-Monumental de la Ciudad de Albarracín . Constituye la única fortaleza y el único yacimiento arqueológico actualmente visitable en la comarca aragonesa Sierra de Albarracín.