Let us now go down to the great mosque on the point. On the top of the principal dome we see a huge gilded crescent. This has glittered up there for 450 years, but previously the cupola was adorned by the Christian Cross. How came the change about? Let us imagine that we are standing outside the church and let the year be 548 A.D. One of the finest temples of Christendom has just been completed by the first architect of his time from Asia Minor. The work has occupied sixteen years, and ten thousand workmen have been constantly engaged at it. But now it is finished at last, and the Church of the Divine Wisdom, Hagia Sophia, is to be consecrated to-day. The great Emperor of the Byzantine realm, Justinian, drives up in a chariot drawn by four horses. He enters the temple attended by the Patriarch of Constantinople. The building is as large as a market-place, and the beautiful dome, round as the vault of heaven, is 180 feet above the floor. Justinian looks around and is pleased with his work. The great men of the church and empire, clad in costly robes, salute him. He examines the variegated marble which covers the walls, he admires the artistically arranged mosaic on the gold groundwork of the dome, he is amazed at the hundred columns which support the cupolas and galleries, some of dark-green marble, others of dark-red porphyry. The Emperor's wealth is inexhaustible. Has he not presented to the church seven crosses of gold, each weighing a hundred pounds? Does not the Church of the Divine Wisdom possess forty thousand chalice veils all embroidered with pearls and precious stones? Are there not in the sacristy twenty-four Bibles, which in their gold-studded cases weigh two hundred pounds each? Are not pictures of the Redeemer, of the Mother of God, of angels, prophets and evangelists suspended between the twelve columns of solid silver which are the Holy of Holies in the temple? Are not the faithful moved to tears at the sight of the crucifix and at the remembrance that the gilded cross of silver is an exact copy of that which, more than five hundred years ago, was set up by Roman barbarians at Jerusalem?