Martin V, being admonished on the subject, after a long delay appointed this other council to be held at Pavia; and afterwards removed it to Siena, and lastly to Bâle. But at its very commencement, on the 21st February, 1431, he died; and was succeeded, in the month of March, by Gabriel Condolmieri, a Venetian, and bishop of Siena, who took the name of Eugenius IV. He sanctioned all that Martin had decreed about holding the council at Bâle; and accordingly it commenced on the 23rd of July, 1431, under the presidency of Cardinal Julian, as representative of the pontiff. Two objects especially were assigned to this celebrated council: first, a union between the Greeks and the Latins; and secondly, the reformation of the church, both in its “head and its members,” according to the resolution adopted in the Council of Constance. Now that the head, namely the sovereign pontiff, and all the members of the church, that is the bishops, priests, and monks, were in a very unsound state no one doubted. But when the fathers, by the very form of the council, by its mode and order of proceeding, and by its first decrees, showed an intention of performing in earnest what was expected of them, Eugenius IV became uneasy for a corrupt church under such physicians, and twice attempted to dissolve the council. This the fathers most firmly resisted; and they showed by the decrees of the Council of Constance, and by other arguments, that the council was superior in authority to a pontiff. This first contest between the pontiff and the council was brought to a close in the month of November, 1433; for the pontiff silently gave up the point, and in the month of December, by letters sent from Rome, gave the council his approbation.
After this the council prosecuted with energy the business upon which it had entered. The legates of the Roman pontiff were now admitted; but not until they had promised under oath to obey the decrees of the council, and particularly the decrees of the Council of Constance, asserting the dominion and jurisdiction of councils over the pontiffs. These very decrees of Constance, so odious to the pontiffs, were renewed in a public meeting of the fathers on the 26th of June, 1434. And on the 9th of June, 1435, annates, as they were called, were abolished, the pontifical legates in vain opposing it. On the 25th of March, 1436, a profession of faith was read, intended for the pope himself on the day of his election. The number of cardinals was reduced to twenty-four; and expectatives, reservations, and provisions were abolished.
Other things coming on little agreeable to the pontiff, Eugenius concluded that this very audacious and troublesome council must either be removed into Italy or be curbed by another council in opposition to it. Therefore, when these fathers decreed, on May 7th, 1437, that on account of the Greeks the council should be held either at Bâle, or Avignon, or in some city of Savoy, the pontiff, on the contrary, by his legates, decided that the council should be held in Italy. Neither party would revoke its decision. Hence a violent conflict, from this time onward, existed between the pontiff and the council. On the 26th of July, 1437, the council ordered the pontiff to appear before them at Bâle, and give account of his conduct. The pontiff, on the other hand, dissolved the council, and appointed another at Ferrara. But the fathers, with the approbation of the emperor, the king of France, and other princes, continued their deliberations at Bâle; and on the 28th of September of the same year pronounced the pontiff contumacious for not obeying the decree of a council.