The people began to see portents in the sky, when the great bonfires in the Turkish camp were reflected on the great dome of S. Sophia. The Emperor stood on the walls watching the enemy keeping festival, it seemed, with sounds of music, and shrill cries and the beating of drums. As he watched, says one who saw him, the tears coursed down his cheeks. He knew what must come, but he was ready to fight to the last. Again he was urged to fly, the Patriarch declaring that the city now must fall. Again, and for the last time he refused. "How many Emperors, great and glorious, before me have suffered and died for their country? Shall I be the one to fly? No, I will die with you!"

The ladies of the imperial household, the sister-in-law of the Emperor and her attendants, were sent away in a ship of Giustiniani's; and everything was prepared for the worst. By gigantic efforts the walls were repaired, and so well was the work done that even the Sultan was for a moment half dismayed.

Already there were many in the Turkish camp who thought the enterprise too hazardous to continue. It was known that a Venetian fleet was on the way, and that a league was being formed by the Pope. After long debate it was decided to make one last assault, and, if that failed, to raise the siege. On the night of the 28th, Mohammed visited all the posts, and promised to his soldiers all the pillage of the city, encouraging them by every hope for this world and the next. In the city priests bearing the sacred icons went through the streets. It was for the last time. For the last time Constantine called his officers together and spoke to them in brave words which burnt themselves into the memory of the faithful Phrantzes.

"Brothers and fellow-soldiers, be ready for the morn. If God gives us grace and valour, and the Holy Trinity help us, in Whom alone we trust, we will do such deeds that the foe shall fall back with shame before our arms." Then, says the chronicler, the wretched Romans strengthened their hearts like lions, sought and gave pardon, and with tears embraced each other as though mindful no more of wife or children or earthly goods, but only of death, which, for the safety of their country, they were glad to undergo. Constantine for the last time went to the great church, and there, before all the bishops, asked the pardon of all whom he had wronged. Then he received his last communion. For the last time the Holy Sacrifice was offered in S. Sophia, and then the last of the Cæsars and his nobles went forth to die.

Before cock-crow he was again at his post; and with the first streak of dawn the Turkish troops poured forth to the attack. Again and again they were forced back, and again forced forward by the troops behind them. The moat had been filled with earth and stones; but a great palisade of stones covered with hides had been set up below the inner wall. The Janissaries at length rushed up to the breach, but even they were driven back. The critical moment came when a wound compelled Giustiniani to retire, and a few minutes after the Turks discovered a gate in the outer wall that had been newly opened, near to the gate of Charisius, and below the palace of the Porphyrogenitus, found it unprotected, and entering through it turned upon the defenders from within. Already the Genoese had left their posts when their leader withdrew. The Janissaries again advanced; they stormed the barricade, and at the moment when some discovered the Kerko-porta,[31] others forced their way through the gate of Charisius, and others through the great breach near where the great Cæsar had stood. When the city was entered he was in the street calling his men around him. He rode forward, cutting his way through the foe, with some of the bravest of his nobles round him. At length he fell, near the gate of S. Romanus, by an unknown hand, and the conquering Turks swept over his body.

The age-long fight which the Imperial East had waged against barbarism was over. The city of the Cæsars and the Church was in the hands of the infidel. The land where the scholarship of the ancient world and the law of the pioneers of equal justice had been preserved unbroken, was now trodden under foot of those whose life was formed on quite other models. Europe had stood by for centuries and watched the gallant battle waged by the Christians who manned the bulwarks of her civilisation. She had now to learn what was meant by the substitution of the Koran for the Bible, of Mohammed for Christ.

Within a few hours of the capture of the gate of S. Romanus the whole city was overrun by the victorious troops. At first they slew all whom they saw, but when it was plain that all opposition was over they began to make captives, tying them together with ropes and dragging them on as they advanced further into the city. In the last hours of the siege thousands had gathered in the great church of S. Sophia. There many still thought that they must find safety. God, they fancied, could not allow the infidel to desecrate the fairest church in all the world. An angel, it had been prophesied, would descend at the last moment and strike the enemies of Christ to the dust.

The great doors were shut, and the hushed thousands stood in prayer. The cries of the victors came nearer and nearer, and at last the doors of the narthex were beaten in and the savage soldiery rushed in, slaying at first, then seizing captives, tearing down every Christian symbol, and shattering with their axes the magnificent iconostasis, before which, twelve hours before, Constantine and his gallant men had bent in reverent devotion.[32]

At noon Mohammed himself entered the city by the gate of S. Romanus. He rode straight down the wide street which leads to S. Sophia, followed by the greatest of his officers and the holy men of the Mussulman faith. At the great door he dismounted, and taking earth from the ground he poured it on his head, as mindful of the end of all earthly conquests. Then he entered, and when he saw that wonderful sight which still strikes dumb with awe the greatest and the meanest of mankind, he stayed. Then, after some minutes' silence, he passed up to the altar. As he went he saw a soldier wantonly breaking up the beautiful pavement with his axe, and sternly forbade him, with a blow. As the priests stood before him he assured them of his protection, and he bade those Christians who still stood unfettered in the church to go to their homes in peace.

Then the Sultan ordered one of the Ulemas to mount the pulpit and read forth to the conquerors from the Koran, and he himself mounted upon the marble altar and prayed. Two legends have grown up round these first moments of the Mussulman triumph in the great church. It is said that as the first infidel entered a priest was celebrating the Eucharist, and that he passed into the wall, which mysteriously opened for him and closed when he had passed, bearing the Body and Blood of the Lord. He will return, they say, when the Christians again have S. Sophia for their own. The other legend points to a pillar at the south-east where a mark like a blood-stained hand stands out on the white marble. There it declared, Mohammed riding his horse over heaps of dead, made an impress of blood and victory, and ordered the slaughter to be stayed.