Proceeding onwards to the left, we follow a vaulted passage of the twelfth century, bearing the stamp of ancient simplicity, until we reach the Plaza San Martino, the north side of which is formed by the vast convent of St. Martin, where, on the centre of the front, are placed, mounted on their chargers, the two warrior saints of France and Spain. Here is the market-place, whither those should come who wish to study favorably the picturesque costumes of the peasants of Galicia, and, it might be added, to hear cries more shrill and louder vociferations than it would be supposed possible for ordinary human lungs to send forth. Before appearing at market the sellers of fruit and vegetables make an elaborate toilette, which must be not only neat but effective, those who are unable to comply with its requirements remaining at home. Side by side with the splendid fruits of Galicia, and fish from river and sea, rosaries, medals, and the scallop-shells of St. James are offered for sale. The building forms a beautiful cross, of which the arms are nearly equal to the upright, the transepts having a great development. The arrangement follows that of most of the churches in Spain, the choir being in the nave and ending where the transept begins. The aspect of the latter is particularly grand, being less interrupted than the view along the nave, as the eye easily penetrates the light trellis-work which makes a passage across it from the choir to the _Capilla Mayor_. The rounded arches of the three roofs are evidently of the close of the eleventh or the commencement of the twelfth century. The pillars of the aisles, with their capitals sculptured in foliage, are light and graceful, contrasting pleasingly with the heavy mass of the edifice. The triforium, which runs round the nave, is composed of semi-circular arches, each containing two smaller ones which spring from a slender column in the centre. The east end remains as it was, with the chapels radiating from it, but the pillars and arches of the choir have undergone great alterations. The _Silleria_, or enclosure of the choir, is ornamented by a series of religious subjects carved by Gregorio Español in 1606. Many of the windows of the cathedral are very fine.