According to Salzenberg, who published his great work on Santa Sophia at Berlin in the year 1854, the colouring of the draperies of Christ and his Apostles is white, the Virgin has blue robes, and the other figures of prophets, angels, and martyrs are in varied colouring. The shades of the folds in the draperies are expressed by quiet blues and greens, the lights being heightened by silver markings. All the mosaics have a ground of gold, and bands of gold enrich the garments of Christ. Although many of the great mosaics of this church belong to the sixth century, some of them are, however, works of a later period. Among other arts, Justinian encouraged mosaic decoration in the highest degree, and is said to have ornamented the palace of his capital with mosaic pictures representing the victories of his armies. Some famous mosaics were executed during the sixth century at Ravenna, notably in the basilicas of S. Apollinare-Nuovo, S. Apollinare-in-Classe, and S. Vitale; in the former there is a fine mosaic, the subject being the Kiss of Judas, and a group of figures where Pontius Pilate is represented washing his hands after the trial of Christ, both of which works again show the antique influence. In the beautiful basilica of S. Apollinare-in-Classe the figure of Christ is represented standing and blessing with uplifted hands, surrounded by the symbols of the Evangelists and a flock of sheep; the angels Gabriel and Michael and the Transfiguration are also represented. The Church of S. Vitale, which was built somewhat after the model of Santa Sophia, has the celebrated mosaics representing processions in state of the Emperor Justinian and the Empress Theodora, who presided at the dedication of the church. The dresses of the principal personages in these mosaics are richly decorated with Byzantine geometric patterns, figured embroidery, and jewellery. In the apse of the church is the celebrated youthful figure of Christ, who is represented without a beard; it is remarkable for its benign expression and softness of its adolescent beauty. The mosaics of S. Vitale are distinctly Greek in character, unlike those of the two former churches, which were executed by Roman mosaicists brought from Italy to Ravenna by Theodoric the Ostrogoth in the early years of the sixth century. The seventh century was almost barren in mosaic works, and the eighth century does not seem to have produced more than a few tentative efforts, mainly in countries outside Italy.