Through this was the entrance into the great courtyard, in the middle of which stood the roofless hall or temple, surrounded by columns and porticoes, inside and out. In some of the inner porticoes were the bookcases for the library which made Alexandria the very temple of science and learning, while other porticoes were dedicated to the service of the ancient religion. The roofs were ornamented with gilding, the capitals of the columns were of copper gilt, and the walls were covered with paintings. In the middle of the inner area stood one lofty column, which could be seen by all the country round, and even from ships some distance out at sea. The great statue of Serapis, which had been made under the Ptolemies, having perhaps marble feet, but for the rest built of wood, clothed with drapery, and glittering with gold and silver, stood in one of the covered chambers, which had a small window so contrived as to let the sun's rays kiss the lips of the statue on the appointed occasions. This was one of the tricks employed in the sacred mysteries, to dazzle the worshipper by the sudden blaze of light which on the proper occasions was let into the dark room. The temple itself, with its fountain, its two obelisks, and its gilt ornaments, has long since been destroyed; and the column in the centre, under the name of Pompey's Pillar, alone remains to mark the spot where it stood, and is one of the few works of Greek art which in size and strength vie with the old Egyptian monuments. The reign of Julian, instead of raising paganism to its former strength, had only shown that its life was spent; and under Jovian (A.D. 363--364) the Christians were again brought into power. A Christian emperor, however, would have been but little welcome to the Egyptians if, like Constantius, and even Constantine in his latter years, he had leaned to the Arian party; but Jovian soon showed his attachment to the Nicene creed, and he re-appointed Athanasius to the bishopric of Alexandria. But though Athanasius regained his rank, yet the Arian bishop Lucius was not deposed. Each party in Alexandria had its own bishop; those who thought that the Son was of the same substance with the Father looked up to Athanasius, while those who gave to Jesus the lower rank of being of a similar substance to the Creator obeyed Lucius. This curious metaphysical proposition was not, however, the only cause of the quarrel which divided Egypt into such angry parties. The creeds were made use of as the watchwords in a political struggle. Blood, language, and geographical boundaries divided the parties; and religious opinions seldom cross these unchanging and inflexible lines.