 Surrounded by a walls with 21 towers; all rectangular less the albarrana of pentagonal, and the attached to it a semicircular plan.Currently are 16 towers, highlighting the "Tower of Tenorio" nominated in memory of the Archbishop.In the 15th century, Archbishop Juan Martínez Contreras (1423-1434) build the east wing, decorated with large Gothic windows, the Anteroom and Hall of the Councils.