Part came from the spoils of Nîmes or Narbonne, part from Seville or
Tarragona, some from the older ruins of Carthage, and others as a present to Abd-ar-Rahman I. from the East Roman emperor Leo IV., who sent also from Constantinople his own skilled workmen, with 16 tons of tesserae for the mosaics. Originally of different heights, the pillars have been adjusted to their present sta...