A very important mosaic of the fourth century still exists in the apse of the Church of S. Pudentia at Rome. The design is not altered from the original, but much of the work has been restored at different times. A colossal figure of Christ is enthroned in the centre of a composition which has an architectural background of temples and churches. St. Peter and St. Paul are represented on either side of the central figure, with other sacred personages, and above in the clouds float the sacred emblems of the Evangelists. After Constantine removed the seat of his empire from Rome to Byzantium (330) mosaic decoration was used in many of the Eastern churches in Macedonia and other places in the Byzantine empire, but it was not until the sixth century that the decided Byzantine Greek style was developed in mosaic work—notably in the mosaics of the great church of Santa Sophia. During the fifth century at Rome, and more especially at Ravenna, the basilicas and Christian churches were decorated on the vaulted ceilings, walls, arches, and spandrels with mosaics, of which the general design and ornamental details were still strongly influenced with the spirit of the antique; but although these works retained much of the dignity pertaining to the latter, they were gradually losing the correctness of drawing which had characterised the mosaics of the fourth century. In the chapter on Early Christian Architecture, in the former volume of this work, pages 288-300, we have drawn attention to some of these mosaics. The church of Santa Sophia was burned down in 533, and the rebuilding of it was finished and the church consecrated in 559. Much of the interior was shortly afterwards covered with mosaic decoration. Near the summit of the cupola was a colossal figure of Christ enthroned, with his arm raised upwards in the act of blessing; below the sacred figure were ranged the Apostles, and in the lower pendentives were groups of people. In the chancel below is a figure of the Virgin enthroned, with the Infant Christ standing on her knees; in the great niches are figures of martyrs and bishops, and in the spaces above the pillars figures of the prophets. On the walls of the narthex, Christ is represented seated on a throne, the crowned figure of Justinian prostrate at his feet, and on the gold background are the heads of the Virgin and St. Michael. In colour the mosaics are sober and refined, the expressions and attitudes of the figures solemn, and often beautiful; the costumes follow the style of the antique.