The earliest of the distinctly Moorish buildings is a little mosque--now called the church of “Cristo de la Luz”--which was standing at the time of the entrance of Don Alonso VI. into the city, on Sunday, May 25, 1085. He entered by the old Puerta de Visagra, and, turning into this the first mosque on his road, ordered mass to be said, and hung up his shield there before he went further. No doubt the nave of the building is still very much in the state in which he found it; it is very small, only 21 ft. 7¼ in. by 20 ft. 2 in., and this space is subdivided into nine compartments by four very low circular columns, which are about a foot in diameter. Their capitals are some of those of which I have just spoken; they are all different, and, it seemed to me, more like Moorish work than the other capitals of the same class at San Roman and Sta. Cruz. The arches, of which four spring from each capital, are all of the round horseshoe form; above them is a string-course, and all the intermediate walls are carried up to the same height as the main walls. They are all pierced above the arches with arcades of varied design, generally cusped in very Moorish fashion, and supported on shafts; and above these each of the nine divisions is crowned with a little vault, formed by intersecting cusped ribs, thrown in the most fantastic way across each other, and varied in each compartment. The scale of the whole work is so diminutive that it is difficult, no doubt, to understand how so much is done in so small a space; but, looking to the early date of the work, it is impossible not to feel very great respect for the workmen who built it, and for the ingenious intricacy which has made their work look so much larger and more important than it really is.[210] It is, indeed, an admirable instance of the skill and dexterity in design which seem to have marked the Moors so honourably from the first, and which must have made them, as far as one can judge, in every respect but their faith so much the superiors of their Christian contemporaries. An apse has been added for the altar, but this is evidently a much later addition to the old mosque. The exterior face of the walls is built of brick and rough stone. The lower part of the side wall being arcaded with three round arches, within the centre of which is a round horseshoe arch for a doorway; above is a continuous sunk arcade of cusped arches, within which are window openings with round horseshoe heads. The lower part of the walls is built with single courses of brick, alternating with rough stonework; the piers and arches of brick, with projecting labels and strings also of unmoulded brick. The arches of the upper windows are built with red and green bricks alternated. The horseshoe arches here are built in the usual Moorish fashion, the lower part of the arch being constructed with bricks laid horizontally, and cut at the edge to the required curve; and about