A stylobate of the height of the pedestals is continued along behind the principal columns, on which rests a series of pilasters dividing the background into recesses or niches containing large statues of the apostles. The figures are executed with some freedom after the Roman manner, and have not such a mediæval aspect as those of Arles. There is, however, evidence of Byzantine influence in the thin folds of the drapery, and the jewels and embroidered ornaments carved upon the dresses. The pedestals, architrave, cornice, and arch mouldings are enriched with Roman leaf and egg and bead ornaments, mixed with fanciful Romanesque carvings of heads of animals &c., in the modillions. The frieze is covered with sculptures in bas-relief of Scripture subjects. The central tympanum contains the figure of Christ in glory surrounded by the emblems of the four Evangelists--that of the north doorway the Virgin and Child in the centre, with the adoration of the Magi on one side, and the annunciation of the birth of Christ to the shepherds on the other. In the south doorway is represented the crucifixion. This portal was probably completed before the breaking out of the Albigensian conflict, about 1150. The portals of St Gilles and Arles are the most splendid productions of Provençal art. They stand almost alone as portals amongst the Romanesque work of the period, which has given rise to the impression that they are importations from a distance rather than a natural sequence from simpler preceding forms out of which they might have grown.