The most interesting part of the papal story is the process that went on within the Church. The intolerable burden of ecclesiastical taxation, the growth of heresy, and the degeneration of the clergy, as well as the Great Schism, had roused Europe to a sense that something must be done, and Europe attempted the old remedy of Ecumenical Councils. At Constance the question of general reform had come up, but the papal party had managed to prevent action. At the next Council, held at Basel, internal difficulties appeared still more plainly. Party lines were sharply drawn; the ultramontanes, as before, wished to subject the Popes to the supremacy of Councils, to substitute an ecclesiastical aristocracy of bishops in place of a papal monarchy, and, as it were, transfer the centre of ecclesiastical gravity from Rome across the Alps. Feeling ran so high that the Council split in two. Part followed the Pope to Italy, and part stayed in Basel and elected an anti-pope (1439). It looked as if schism had come again, but the danger passed. The anti-pope resigned; unity was restored and lasted for seventy years. Nicholas V, as we have seen, hoped to maintain the Papacy at the head of Christendom by means of the new intellectual forces. Such a conception was purely Italian, and showed plainly enough that the Papacy had ceased to represent Christendom, had ceased to be the real head of a Universal Church, and had become a purely Italian institution. While Nicholas and his successors were thinking of culture and of becoming Italian princes, the pious ultramontanes, comparatively indifferent to the intellectual excitement of the Renaissance, were thinking of sin and of the remedy for sin. The papal Curia was clever, but did not foresee that to subordinate the old conception of the Papacy as the head of the religious and ecclesiastical organization of Europe to the new conception of it as an Italian principality would surely alienate the Teutonic peoples; it did not foresee that the Renaissance, with its spirit of examination, investigation, criticism, with its encouragement of the free play of the human mind, was necessarily preparing the way for the Reformation. But the Curia perceived the opposite difficulties, to which we are generally blind, that unless the Papacy did establish itself as a temporal power, it might well be reduced to another Babylonish Captivity by a king of Naples, a duke of Milan, or even by some _condottiere_. And it perceived that other difficulty as well, that if the Papacy turned against the intellectual movement, the intellectual movement would, in self-defence, turn against the Papacy.