A first fortress was probably built in the 11th century, when Jerez was part of the petty kingdom of the taifa of Arcos de la Frontera, on a site settled since prehistoric times in the south-eastern corner of the city. In the 12th century, a new structure was erected to be used as both residence and fortress by the Almohad rulers of southern Spain. Later, after the Reconquista of Andalusia, it was the seat of the first Christian mayors.
a grossly quadrangular line of walls, with a perimeter of c. 4,000 m
Palace of the Patio de Doña Blanca, dating to the 12th century Islamic structure, originally a leisure pavilion
Baths. They include an entrance area for undressing, leading to the cold and tepid rooms, the latter being the largest in the complex. The final room is the hot room, whose heating system is still partially visible.