The central lantern is carried on piers, which have evidently been in great part rebuilt at some time subsequent to the foundation of the church. They carry pointed arches of granite, clumsily moulded, and have rudely-carved capitals. Two piers on the south of the nave next the Crossing, and one on the north, were either partly or altogether rebuilt at the same time, and it looks very much as though the first lantern had partly fallen, and then, two centuries after the original foundation of the church, the existing one had been erected, for over the pointed arches there still seem to be remains of the older round arches. The lantern is rather loftier than is usual; it is vaulted with an eight-ribbed dome, carried on arched pendentives, and is lighted by small windows of two lights in its upper stage. Dávila[179] says that this church was rebuilt in the time of Ferdinand “El Santo” (1252-1284), who endowed it with certain rents for the purpose. But other authorities say, with more show of probability, that the work undertaken in this year was the repair of the church. The rebuilding at this date, which is utterly inconsistent with the whole character of the church, agrees, nevertheless, very well indeed with that of the lantern. Subsequently, in A.D. 1440, according to Dávila,[180] the tower of the church was built, and this statement probably refers to the upper stages of the western steeples. The crypt under the choir, called Nra. Sra. de Soterraña, is important only for its position: it is entered by a long flight of steps from the east end of the north aisle, and extends under the three eastern apses. It is mainly modernized, and the great attraction seems to be the hole in which, as I understood, people who wish to take a solemn oath put their hands whilst they swear. There are no original ritual arrangements remaining here; but an iron Reja is carried across the nave and aisles one bay to the west of the crossing, and here probably was the old place for the Coro, as the position of the shrine of San Vicente under one side of the lantern would have made it impossible for the Coro to be placed nearer the east.