At length all the allies agreed to demand formally of the Emperor the payment of the money that was promised; if he refused they would defy him to his face. The scene was another of those dramatic audacities which so often flash across the history of the city. Villehardouin and five others stood before the Emperors on their thrones in the palace of Blachernae, and their spokesman, Conan de Bethune, spoke thus:
"We come to summon you in the presence of your barons to fulfil the agreement made between you and us. If you fulfil it, well; if not, take note that the barons will hold you neither for lord nor friend, but they will deem themselves free to take what belongs to them as they can get it. They give you warning that till they have defied you they will do you no harm. They will not betray you; that is not the custom of their land. Now you have heard what we have said, and you will take counsel on the matter how you will."
No such speech, men said, had ever been made to a Roman Emperor; and Villehardouin wonders that the envoys were allowed to depart in peace. But for a week or two nothing happened. Yet the city was slowly rising to fever point. Attacks were made on the Venetian fleet; the people assembled in the great Church of S. Sophia and debated how they could drive out the foreigner, and replace the dastard Emperors. Then it seemed to Alexius that he must protect himself. He called on Boniface of Montferrat to protect the palace with Frenchmen and Italians. That sealed his fate.
Alexius Ducas, a kinsman of the Emperors and protovestiarios of the household, whom the people called "Mourtozouphlos" on account of his thick overhanging eyebrows, determined to dethrone the Cæsars and replace them. He prevailed on Alexius to leave the palace for safety, and at once placed him in chains. In a few days both he and his father were dead, and Alexius V. was crowned in S. Sophia.
The new Emperor set himself at once to defend the city, and at once he drew down on him the vengeance of the Crusaders. They were, of course, the defenders of Isaac Angelus and his son. "Never was so horrible a treason committed by any people as deposing and imprisoning young Alexius," says Villehardouin, who had a few days before taken part in insulting him to his face. When a little later they heard that he was dead, they paused for a while as though in dismay: their difficulties grew on them: the storms of a January at Constantinople made them reluctant to embark: and yet what could they do?
Henry Dandolo met the new Emperor in conference within the walls, and demanded the submission of the Church to Rome and an immediate payment of money. It is said that there was a treacherous attempt to capture the Emperor. At any rate no compromise was arrived at, and the divergent parties among the Crusaders agreed to besiege the city. Long was the debate before the final step was taken. They talked, says Villehardouin in his quaint way, before and behind. At last it was agreed how to divide the spoil, how a new Emperor and a new patriarch should be chosen.
On April 9, 1204, the first attack was delivered, on the Petrion or Phanar, and the gate now called Petri Kapoussi at the east of the church of the Patriarchate was first attacked. The invaders were repulsed. A second attack, on the 12th, was more successful. "The flying bridge of the Pélerine lodged itself on a tower and allowed a bold French knight, André d'Urboise, to rush across, seize the tower, and clear a way for their comrades to follow. Here ladders were then landed, the walls scaled, three gates forced, and the city thrown open to the whole host of the invaders." In vain did Mourtozouphlos try to rally his troops; he was forced to take refuge in the palace of the Bucoleon. In the night he fled through the Golden Gate, through which before Emperors had entered only in triumphal procession. Next day the Crusaders entered; the palaces were occupied; the troops marched through the streets; and then the horrible work of plunder and ravage began.
Nicetas, the Grand Logothete, whose own house was burnt earlier in the siege, and who now had to escape with his family as best he might, tells piteous tales of the horrors that ensued. Of the destruction of precious things it seems impossible to draw an adequate picture. S. Sophia, then the richest as well as the finest church in the world, was utterly despoiled; and what had been "an earthly heaven, a throne of divine magnificence, an image of the firmament created by the Almighty," became like a bare barn, and was defiled by the most disgraceful scenes of profanity and horror.
When the church had been stripped of everything it contained, the altars of precious metals broken up to be melted down, the vestments and carpets and hangings carried off, the sacred vessels packed up with the other plunder as if they were common things, the sacred icons torn down from the splendid iconostasis; when the tombs of the emperors had been rifled, and the body of Justinian cast out like that of a criminal in the search for treasure, it might be thought that the worst was over. It was not so. Then began the hunt for relics which made not the least degrading part of the work of these soldiers of Christ. Well was it said by a contemporary that if these soldiers had when they besieged the city the shield of the Lord, now when they had taken the city they threw away His shield and took the shield of the devil. Bitter, and well deserved, were the words of Nicetas. "You have taken up the Cross, and have sworn on it and on the Holy Gospels to us that you would pass over the territory of Christians without shedding blood and without turning to the right hand or to the left. You told us that you had taken up arms against the Saracens only, and that you would steep them in their blood alone. You promised to keep yourselves chaste while you bore the Cross, as became soldiers enrolled under the banner of Christ. Instead of defending His tomb, you have outraged the faithful who are members of Him. You have used Christians worse than the Arabs used the Latins, for they at least respected women."
Of the extraordinary quantity of ecclesiastical plunder taken by the Crusaders we have the records collected by Comte Riant in his monumental (and delightful) volumes of Exuviæ Sacræ Constantinopolitanæ. It may be observed, to begin with, that he collects no less than a hundred and forty-four letters relating to the reception in the West of these stolen relics. To these are added endless references in the chroniclers of the time, who were enchanted with the riches that poured upon their religious houses, and displayed all the passion of a collector of antiquities combined with the business instincts of a dealer in curiosities and the piety of a hagiologist. In spite of all this evidence—and there is more of it, in inscription, later lives of the saints, and the like—it is impossible to discover exactly all that was stolen, because the lists of the relics preserved in the churches of Constantinople at the actual time of the siege have disappeared. But it is possible of course, from earlier lists, as well as from the sources already named, to discover what were the greater part of the relics taken.