On entering the nave at the west end, the effect of the arcades, triforia, and clerestory is very fine, though much damaged by the arrangement of the choir, which, as in most Spanish churches, is brought down into the nave, enclosed with close walls or screens, and entered only from the transept at its eastern end. An altar is placed against the western entrance of the choir, and the nave being only six bays in length, and equally divided, the view is--it may easily be imagined--very confined and cramped. Otherwise, the architectural features of the nave are thoroughly good. The original scheme evidently included two western steeples, the piers which support them--large clusters of engaged shafts--being larger than any of the others, yet of the same date. The nave columns are circular, with eight engaged shafts around them. The bases are circular, finished on squares, with knops of foliage filling in the spandrels. The abaci are all square in plan, and both bases and caps are set at right angles to the direction of the arches they support. One of the smaller columns carries the pier arch, the other three carry the transverse and diagonal groining ribs, whilst the wall ribs are carried on shafts on each side of the clerestory window. The pier arches are of ordinary early-pointed character, and well moulded. There is not much variety in the general design of the nave and transepts, though some changes of detail occur. The triforium in both is very peculiar, as will be seen by the illustration which I give of one bay of the nave. The openings vary considerably in number, and the piercings of the tympanum and in the enclosing arch are also singularly arranged. I know nothing like this singular triforium elsewhere. It is certainly more curious than really beautiful, but at the same time it is valuable, as seeming to prove this part of the work to be from the hand of a native artist. The enclosing label is in all cases a segment of a circle, and filled with sculptured heads at short intervals apart. At first sight this triforium hardly seems to be of early date, having suffered by the addition of pinnacles covered with crockets in front of, and open traceried parapet walls between, the detached shafts on which the early traceries were carried; the result is, that one of the most striking features in the church is completely spoiled, and a general effect of very poor and tawdry design is felt more or less throughout the whole building.[8]