The chief feature of the reign of the last John Paleologus was his attempt to win aid for the empire by enlisting sympathy in Western Europe. He determined to conform to Roman Catholicism and to throw himself on the generosity of the Pope. Accordingly he betook himself to Italy in 1438, with the Patriarch of Constantinople and many bishops in his train. He appeared at the Councils of Ferrara and Florence, and was solemnly received into the Roman Church in the Florentine Duomo, on July 6, 1439. It had apparently escaped John’s notice that Eugenius IV., the pope of his own day, was a very different personage from the great pontiffs of the eleventh and twelfth centuries, who were able to depose sovereigns and send forth Crusades at their good pleasure. Since the Great Schism the papacy had been hopelessly discredited in Christendom. Eugenius IV. was engaged in waging a defensive war against the Council of Basle, which was attempting to depose him, and had little thought or power to spend on aiding the Eastern Christians. All that John could get from him was a sum of money and a body of three hundred mercenary troops. This was a poor return for his journey and conversion. Only one thing of importance was accomplished by the apostasy of the Emperor—the outbreak of a venomous ecclesiastical struggle at Constantinople between the conformists who had taken the oath at Florence, and the bulk of the clergy, who disowned the treaty of union. John was practically boycotted by the majority of his subjects; the Orthodox priests ceased to pray for him, and the populace refused to enter St. Sophia again, when it had been profaned by the celebration of the Roman Mass. The opinion of the majority of the Greeks was summed up in the exclamation of the Grand-Duke John Notaras—“Better the turban of the Turk in Constantinople than the Pope’s Tiara.” The last years of the reign of John VI. coincided with the great campaigns of Huniades and Ladislas of Poland against the Turks. For a moment it seemed as if the gallant king of Poland and Hungary, backed by his great Warden of the Marches, might restore the Balkan lands to Christendom. They thrust Murad II. back over the Balkans, and appeared in triumph at Sophia. But the fatal battle of Varna [1444] ended the career of King Ladislas in an untimely death, and after that fight the Ottomans were obviously fated to accomplish their destiny without a check. John Paleologus watched the struggle without movement if not without concern. He was too cautious to stir a finger to aid the Hungarians, for he knew that if he once offended the Sultan his days would be numbered.