Alcázar de los Reyes Cristianos when Cordoba was taken by Fernando III «the Saint» in 1236, the former Caliphal Palace was in a pitiful, ruinous state. Alfonso X «the Wise» began the restoration work, which was finished off during the reign of Alfonso XI. It has fulfilled many different functions over the years, such as Headquarters of the Inquisition, or a prison (first half of the 20th century).