The arches on either side of the great western porch are filled in with open trellis-work wood-screens, which show how good occasionally may be the adaptation by Gothic hands of Moorish work. Here the lines of wood cross each other at intervals, leaving, of course, a regular series or diaper of open squares. The edges of all these are simply cut out in a pattern, or notched, in a variety of forms, and the effect is extremely good. The same kind of work is common in Moorish buildings, but I had not seen it before so boldly used by Christians. [Illustration: AVILA: San Vicente and MEDINA DEL CAMPO: S: Antholin: Plate XI. Published by John Murray, Albermarle Street 1865] San Vicente stands outside the walls of Avila, close to one of the principal gates, and near the north-east angle of the city. The church of San Pedro is similarly placed at the south-east angle, and at the end of a large open Plaza called the Mercado Grande. It is not a little remarkable that so soon after the enclosure of the city within enormous walls two of the most important of its churches should have been built deliberately just outside them, and exposed to whatever risks their want of defence entailed. In plan and general design San Pedro is very similar indeed to San Vicente. It has a nave and aisles of five bays, transepts of unusual projection, a central lantern, and three apsidal projections to the east. The doors, too, are in the centre of the west front, and in the next bay but one to the transept on both sides. The detail is almost all of a simple and extremely massive kind of Romanesque, round arches being used everywhere and uncarved capitals with square abaci. The nave piers are of the commonly repeated section, but very large in proportion to the weight they have to carry. There is no triforium, and the clerestory windows are of moderate size, whilst those in the aisles are very small, and placed as high as possible from the floor. The groining generally is quadripartite, and some of the ribs boldly moulded in a manner which suggests the possibility of this severe Romanesque-looking work being in truth not earlier than circa 1250. The transepts and the western portion of the apses are covered with waggon-vaults, and the apses themselves with semi-domes. The lantern over the Crossing is probably not earlier than A.D. 1350, the mark of the junction with the old work just over the arches into the transepts being still very plainly visible. The vaulting here is very peculiar. Groined pendentives at the angles are introduced to bring the vault to an octagon in plan, but the eight compartments are variously treated; those on the cardinal sides having ordinary vaulting cells over the windows, whilst those on the intermediate or diagonal sides are crossed with four segments of a dome with the masonry arranged in horizontal courses.