Probably very few of these early Christians were Italians; most of them were from the Levant, and that they were intensely emotional is proved by their lust for martyrdom--they voluntarily sought death as a means of glorifying God. One day Arrius Antoninus, proconsul of Asia, having ordered certain Christians arrested, saw all the faithful of the town present themselves before his tribunal, demanding to share the fate of those chosen for martyrdom. He dismissed them in wrath, telling them that if they were so in love with death they might commit suicide;[392] and Renan’s account of the persecutions under Nero shows an incredible exaltation.[393] Almost at once the effect of this emotional temperament became perceptible. The paintings in the catacombs are, perhaps, the oldest example of Christian art, and of these M. Vitet thus spoke many years ago:-- “These decorations, made with the hand raised, in secret, hurriedly, and more for pious reasons than for love of the beautiful, nevertheless reveal to the most rebellious eyes and in spite of strange negligence and incorrectness, I know not what of animation, of youth, of fecundity, and, so to speak, a real transformation of that very art which, in the service of paganism, seemed then, we are all agreed, dying of exhaustion.”[394] As the world disintegrated, and the imagination everywhere acquired power, and with power wealth and the means of expression, an entirely new architecture sprang up in the East, whose growth closely followed upon the barbarian invasions and the progressive failure of the Roman blood. The system of construction was Asiatic modified by Greek influences,[395] and with this new construction came an equally new decoration, a decoration which once more served as a language. Mosaics of stone had long been used, but mosaics of glass, which give such an incomparable lustre to the dome, were the invention of Levantine Christians, and seem to have come into general use toward the beginning of the fifth century. But the fifth century was the period of the great invasions of Alaric, Attila, and Theoderic, and during this period the population of Italy, Macedonia, and Thrace must have undergone profound changes. In Italy the whole fabric of consolidated society crumbled; south of the Danube it survived, but survived in a modified form, a form on which the recent migrations left an unmistakable imprint. Galla Placidia, the first great patron of the pure Byzantine school, died in 450, after an eventful life largely passed among the barbarians, one of whom she married. She began to embellish Ravenna, and a comparison of these remains with those of France and Italy of the eleventh, twelfth, and thirteenth centuries, exposes the difference in the forces which moulded these three civilizations.