First English edition of the Nuremberg chronicle: being the Liber chronicarum of Dr. Hartmann Schedel…

In this city many general councils were held under the emperors, and many heresies which arose against the Christian faith were discovered and suppressed. Of these heresies the one that endured the longest was that concerning the exit of the Holy Ghost, which was condemned and rejected under Pope Eugenius IV in the Council at Florence, not only by the Latin, but also by the Greek Church. And although John the patriarch of Constantinople and John the Greek emperor were in unison with the Latin Church on the articles of faith, yet the Church at Constantinople would not accept them. The patriarch who acceded thereto died at Florence, and the emperor did not live long after his home journey. Constantius, the emperor who succeeded him, was either misled or wilfully refused to accede thereto, and he expelled Gregory the patriarch because he followed the true faith. Therefore Pope Nicholas V sent there Isidorus, the Sabinian cardinal, a very excellent man who had for a long time ruled the Hussian church, to ascertain why the Greeks disregarded the agreements which their legates had made with the Latins in the council of Florence. This cardinal influenced the emperor of Constantinople and his advisers to the right course, when the war of Mohammed suddenly threatened them. I see that many in our time, not only credible teachers and poets, but also historians, commit the error of calling the Turks Teucros, due, I believe, to the fact that the Turks are in possession of Troy, which was once occupied by the Teucros; but their origin is of Crete or Candia and Italy. The Turks are from Scythia, and have so expanded that they flow possess Asia and Greece, to the dismay of the Latin and Christian name. Of this mention will be made later.