Adjoining this invaluable little casket is the _maksourah_, or, as it is called by the Spaniards, _el zancarron_[236] (the heel-bone): a name which favours the supposition that it was the place of burial of the founder or finisher of the mosque, rather than the sanctuary of the Koran, as is generally supposed, although, indeed, it might have been both.
The architecture and ornaments of this sanctum differ from those of the rest of the mosque, being even yet more complicated and richly finished; but it is by no means in so good a state of preservation as the recess just described. The face of the arch that spans the entrance of the _zancarron_ is elaborately worked in crystals of various hues, and encompassed with moral precepts from the Koran. The interior is an octagon, only fifteen feet in diameter, and is domed over by a single block of white marble, carved into the form of a scollop-shell. Another huge slab of the same material forms its floor.
The shrine of the caliph, descendant of the prophet, probably occupied the centre of this recess; round which the feet of the numberless pilgrims who visited the holy place have worked a groove in the hard marble. It is situated _now_ towards the south-west angle of the building, but in the original mosque it stood, as I have already stated, exactly in the centre of its south wall, facing the grand entrance. On each side were the apartments of the Imans; and in front, extending east and west, across the building, a space of the width of two intercolumniations was set apart as a chancel or _mikrab_, wherein the officiating priests performed their mysterious ceremonies before the people, to whom different portions of the rest of the building were appropriated, according to their rank in life.
At the north end of the mosque is a spacious court, encompassed on three sides by an open colonnade, and furnished with copious fountains. Here, when occasion required, the Mussulmans purified their bodies by ablutions ere entering the holy place, and, leaving their slippers under the arcades, proceeded barefoot to the shrine of Mohammed's descendant, making divers prostrations in the course of their short journey.
This court, now called the _Patio de los Naranjos_,[237] is the same width as the mosque, and adds 200 feet to its length; making the exterior dimensions of the building 574 (English) feet from north to south, and 416 from east to west.