In 1163 the caliph Abu Ya'qub Yusuf made the Alcazar his main residence in the region. He further expanded and embellished the palace complex in 1169, adding six new enclosures to the north, south, and west sides of the existing palaces. The works were carried out by architects Ahmad ibn Baso and 'Ali al-Ghumari. With the exception of the walls, nearly all previous buildings were demolished, and a total of approximately twelve palaces were built. Among the new structures was a very large garden courtyard, now known as the Patio del Crucero, which stood in the old Abbadid enclosure. Between 1171 and 1198 an enormous new congregational mosque was built on the north side of the Alcazar (later transformed in to the current Cathedral of Seville). A shipyard was also built nearby in 1184 and a textiles market in 1196.