The Outer Wall between the Kerkoporta and the Adrianople Gate had been largely damaged and a breach made which had been stormed unsuccessfully during the night. The Turks had here also, as well as near the Romanus Gate, been able to pass the ditch and take possession of the Outer Enclosure.

As daylight approached, some of the enemy noticed that the Kerkoporta had been left open. A number of Janissaries (stated by Ducas to be fifty) hastened through and took possession of it. They were soon followed by others, who gained access to the Inner Enclosure first through the Kerkoporta and then through the neighbouring postern already mentioned in the transverse wall, the distance between the two posterns being about thirty yards. They surprised and attacked those who were occupied in resisting the attempts of Caraja’s main division to storm the breach or scale the Outer Wall. Every foot they captured allowed their numbers to be increased by comrades who could now climb the Outer Wall without opposition or who crowded in through the Kerkoporta and the postern in the transverse wall. The besieged, overwhelmed by numbers, and having their retreat into the city through the postern cut off, fled towards the Adrianople Gate, the postern of which was soon blocked by the crowd, the stronger trampling upon the weaker, so that presently all egress from the Enclosure was impossible. A slaughter took place and a few Turks entered the city, while others mounted the walls, pulled down the emperor’s flags and those of St. Mark and replaced them by the Turkish standards.

The entry of the Turks by the Kerkoporta is only related by Ducas, but it is incidentally confirmed by the fact mentioned by Phrantzes and other writers, that while the struggle in the Lycus valley was going on, the Turkish standards were raised on the towers to the north of the Adrianople Gate before an entry had been effected elsewhere.[421] Critobulus’s statement that Caraja’s men crossed the foss, made a vigorous assault, and sought to pass within the broken-down (Outer) wall, but were repulsed, probably refers to the same incident.[422] Ducas is careful to state that the emperor and the Romans did not know what had happened, because they were at some distance and were too much occupied in defending themselves in a different place, which he explains to be where the wall had been broken down: that is, at the stockade in the Lycus valley. While they were thus fighting, he says, to resist the entry through the ruined wall, God willed that the enemy should enter the city by this other way. Leonard mentions that the arrangements for sending messengers from one part of the wall to another were defective. The emperor, however, was probably informed of the entry by the Kerkoporta and of the capture of at least part of the enclosure between that postern and the Adrianople Gate, and hastened thither before his army under Justiniani learned that the Turkish standards had been hoisted on the towers near the Adrianople Gate.[423] The few Turks who had entered the city, bent upon plunder, made for the rich monasteries of Choras and St. John in Petra and the Blachern palace; but it would appear that the brothers Bocchiardi were able to regain possession of the Enclosure and to prevent any considerable number of the enemy from following those who had entered the Kerkoporta. Possibly even they were strong enough to close it. The fact that the entry at the Kerkoporta is not mentioned by Critobulus may be taken to confirm the view that, if he knew of it at all, he only regarded it as a somewhat unimportant incident.

Meantime in the Enclosure in the Lycus valley the struggle was being bravely fought out with pikes, axes, javelins, long lances and swords, for now, as Critobulus is careful to inform us, ‘the fight was hand-to-hand.’[424] The obstinate resistance of the little band of Greeks and Italians appears to have met with some success. The attack by the Janissaries and the rest of the sultan’s own division had so far failed and was weakening.

John Justiniani wounded.

It was at this moment that one of those fateful accidents occurred which have at times decided the destiny of nations. John Justiniani, who under the emperor was in supreme command, was severely wounded. He bled profusely, and determined to leave his command in order to obtain medical aid. The wound was so severe that it proved mortal within a few days. But those present did not recognise its gravity. Some of his contemporaries deny that it was sufficiently grave to justify his leaving the field, but Critobulus, writing some years afterwards, states that he had to be carried away.[425] Leonard and Phrantzes say that when the emperor was informed of his determination to enter the city, Constantine besought and implored him not to do so but to return to his post, endeavouring to persuade him that the wound was slight and pointing out that his departure would demoralise not only his own men but the Greeks, and strongly urged that the fate of the city depended on his remaining. Justiniani, however, pleaded the pain of his wound, demanded that the key of the gate leading into the city should be given to his men,[426] and insisted upon leaving the Peribolos or Enclosure, promising to return when his wound had been attended to. The keys of a small gate which Justiniani had caused to be opened in the Inner Wall to give easier access to the Enclosure behind the stockade were brought and he entered the city.[427]

The story told by Chalcondylas is that in reply to the emperor’s question whither he was going, Justiniani said that he was going where God Himself had opened a way for the Turks. It may well be doubted. He was accompanied, say Critobulus and others, by his own men, a statement, however, which can hardly apply to the whole four hundred. The unlocking of the gate proved at once to be a dangerous temptation to soldiers who had been fighting continuously for hours and who had seen the departure of their leader. Justiniani made his way to his ship, which was stationed at the boom, and escaped to Chios, where he died within a few days—or possibly on the way thither.[428]