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 chap. XL] OF THE ROMAN EMPIRE 263 itself, a name which insensibly became familiar to Christian ears, was placed in the eastern recess, artificially built in the form of a demi-cylinder ; and this sanctuary communicated by several doors with the sacristy, the vestry, the baptistery, and the contiguous buildings subservient either to the pomp of worship or the private use of the ecclesiastical ministers. The memory of past calamities inspired Justinian with a wise resolution that no wood, except for the doors, should be admitted into the new edifice ; and the choice of the materials was applied to the strength, the lightness, or the splendour of the respective parts. The solid piles which sustained the cupola were composed of huge blocks of freestone, hewn into squares and triangles, for- tified by circles of iron, and firmly cemented by the infusion of lead and quicklime; but the weight of the cupola was diminished by the levity of its substance, which consists either of pumice-stone that floats in the water or of bricks from the isle of Rhodes five times less ponderous than the ordinary sort. The whole frame of the edifice was constructed of brick ; but those base materials were concealed by a crust of marble ; and the inside of St. Sophia, the cupola, the two larger and the six smaller semi-domes, the walls, the hundred columns, and the pavement, delight even the eyes of Barbarians with a rich and variegated picture. A poet, 105 who beheld the primitive lustre Marbles of St. Sophia, enumerates the colours, the shades, and the spots of ten or twelve marbles, jaspers, and porphyries, which nature had profusely diversified, and which were blended and con- trasted as it were by a skilful painter. The triumph of Christ was adorned with the last spoils of Paganism, but the greater part of these costly stones was extracted from the quarries of Asia Minor, the isles and continent of Greece, Egypt, Africa, and Gaul. Eight columns of porphyry, which Aurelian had placed in the temple of the sun, were offered by the piety of a Roman matron ; eight others of green marble were presented 105 PauLSilentiarius, in dark and poetic language, describes the various stones and marbles that were employed in the edifice of St. Sophia (P. ii. p. 129, 133, &c. &c.) : 1. The Carystian — pale, with iron veins. 2. The Phrygian — of two sorts, both of a rosy hue : the one with a white shade, the other purple, with silver flowers. 3. The Porphyry of Egypt — with small stars. 4. The green marble of Laconia. 5. The Carian — from Mount Iassis, with oblique veins, white and red. 6. The Lydian — pale, with a red flower. 7. The African,-ov Mauritanian — of a gold or saffron hue. 8. The Celtic — black with white veins. 9. The Bosphoric — white, with black edges. Besides the Proconnesian, which formed the pavement ; the Tlwssalian, Molossian, &c. which are less distinctly painted.