There is no provision in the plan of the main piers for carrying the diagonal groining ribs, and it may be, therefore, that when they were first planned it was not intended to groin the nave. The groining-ribs are now carried on corbels, in front of which were statues, only two or three of which, however, now remain in their places.[94] The vaulting throughout is quadripartite in the arrangement of the ribs; but the vaults of the three western bays of the nave, of the south transept, and of the aisles are constructed as domes, with the stones all arranged in concentric lines, but with ribs crossing their undersides; the two eastern bays of the nave have quadripartite groining, planned in the common way. The apses have semi-domes. The main arches everywhere are pointed, those of the windows semi-circular, and the capitals throughout are elaborately carved, either with foliage or groups of coupled monsters or birds, a very favourite device of the early Spanish sculptors. The most interesting feature in this old cathedral still remains to be mentioned: this is the dome over the crossing. The remainder of the original fabric is bold, vigorous, and massive, well justifying the line in an old saying about the Spanish cathedrals, “Fortis Salmantina;” but still it is merely a good example of a class of work, of which other examples on a grander scale are to be met with elsewhere. Not so, however, the dome; for here we have a rare feature treated with rare success, and, so far as I know, with complete originality. The French domed churches, such as S. Front, Perigueux, and others of the same class, Notre Dame du Port, Clermont, and Notre Dame, le Puy, have, it is true, domes, but these are all commenced immediately above the pendentives or arches which carry them. The lack of light in their interiors is consequently a great defect, and those which I have seen have always seemed to me to have something dark, savage, and repulsive in their character. And it was here that the architect of Salamanca Cathedral showed his extreme skill, for, instead of the common low form of dome, he raised his upon a stage arcaded all round inside and out, pierced it with windows, and then, to resist the pressure of his vault, built against the external angles four great circular pinnacles. [Illustration: No 7 SALAMANCA OLD CATHEDRAL p. 80. INTERIOR OF LANTERN, LOOKING EAST]