This sovereignty was temporal as well as spiritual. The power of the Pope, as the earthly representative of God, was illimitable. The official theory, as expressed in the De Principum Regimine, which passes under the name of St Thomas Aquinas, declared the temporal jurisdiction of kings to be simply derived from the authority intrusted by Christ to St Peter and his successors; whence it followed that the exercise of the royal authority was subject to papal control. As Matthew of Vendome had already sung—
Papa regit reges, dominos dominatur, acerbis
Principibus stabili jure jubere jubet.
The arguments of Marsiglio of Padua, intended to restore the imperial system of a Church subordinate to the State, were of some assistance to Louis of Bavaria in his long struggle with the papacy; but at his death they virtually disappeared from view. The Councils of Constance and Basel were an effort on the part of the prelates and princes to limit the papal authority, and if they had succeeded they would have rendered the Church a constitutional monarchy in place of a despotism; but the disastrous failure at Basel greatly strengthened papal absolutism. The superiority of Councils over Popes, though it continued to be asserted by France in the Pragmatic Sanction of 1438, and from time to time by Germany, gradually sank into an academic question, and the Popes were finally able to treat it with contempt. In 1459, at the Congress of Mantua, Pius II, in his speech to the French envoys, took occasion to assert his irresponsible supremacy, which could not be limited by general councils and to which all princes were subject. In his extraordinary letter to Mohammad II, then in the full flush of his conquests, Pius tempted the Turk to embrace Christianity with the promise to appoint him Emperor of Greece and of the East, so that what he had won by force he might enjoy with justice. If the Pope could thus grant kingdoms, he could also take them away. George Podiebrad, King of Bohemia, committed the offence of insisting on the terms under which the Hussites had been reconciled to the Church by the Fathers of Basel; whereupon Pius II in 1464, and Paul II in 1465, summoned him to Rome to stand his trial for heresy; and the latter, without awaiting the expiration of the term assigned, declared him deprived of the royal power, released his subjects from their allegiance and made over his kingdom to Matthias Corvinus of Hungary, with the result of a long and devastating war. Julius II, in his strife with France, gave the finishing blow to the little kingdom of Navarre by excommunicating in 1511 those children of perdition Jean d’Albret and his wife Catherine, and empowering the first comer to seize their dominions—an act of piety for which the rapacious Ferdinand of Aragon had made all necessary preparations. In the bull of excommunication Julius formally asserted his plenary power, granted by God, over all nations and kingdoms; and this claim, amounting to a quasi-divinity, was sententiously expressed in one of the inscriptions at the consecration of Alexander VI in 1492—
Caesare magna fuit, nunc Roma est maxima. Sextus
Regnat Alexander: ille vir, iste Deus.
While it is true that the extreme exercise of papal authority in making and unmaking Kings was exceptional, still the unlimited jurisdiction claimed by the Holy See was irksome in many ways to the sovereigns of Europe and, as time wore on and the secular authority became consolidated, it was endured with more and more impatience. There could be no hard and fast line of delimitation between the spiritual and the temporal, for the two were mutually interdependent, and the convenient phrase, temporalia ad spiritualia ordinata, was devised to define those temporal matters, over which, as requisite to the due enjoyment of the spiritual, the Church claimed exclusive control. Moreover it assumed the right to determine in doubtful matters the definition of this elastic term and the secular ruler constantly found himself inconveniently limited in the exercise of his authority. The tension thence arising was increased by the happy device of legates and nuncios, by which the Holy See established in every country a representative whose business it was to exercise supreme spiritual jurisdiction and to maintain the claims of the Church, resulting in a divided sovereignty, at times exceedingly galling and even incompatible with a well-ordered State. Rulers so orthodox as Ferdinand and Isabel asked the great national Council of Seville, in 1478, how they could best prevent the residence of legates and nuncios who not only carried much gold out of the kingdom but interfered seriously with the royal pre-eminence. In this they only expressed the desires of the people; for the Estates of Castile, in 1480, asked the sovereigns to make some provision with respect to the nuncios who were of no benefit and only a source of evil.
Another fruitful source of complaint, on the part not only of the rulers but of the national Churches, was the gradual extension of the claim of the Holy See to control all patronage. Innocent III has the credit of first systematically asserting this claim and exploiting it for the benefit of his Cardinals and other officials. The practice increased, and Villani tells us that, in 1319, John XXII assumed to himself the control of all prebends in every collegiate church, from the sale of which he gathered immense sums. Finally the assertion was made that the Holy See owned all benefices and in the rules of the papal Chanceries appear the prices to be charged for them, whether with or without cure of souls, showing that the traffic had become an established source of revenue. Even the rights of lay patrons and founders were disregarded and in the provisions granted by the popes there was a special clause derogating their claims. Partly this patronage was used for direct profit, partly it was employed for the benefit of the Cardinals and their retainers, on whom pluralities were heaped with unstinted hand, and the further refinement was introduced of granting to them pensions imposed on benefices and monastic foundations. Abbeys, also, were bestowed in commendam on titular abbots who collected the revenues through stewards, with little heed to the maintenance of the inmates or the performance of the offices. In the eager desire to anticipate these profits of simony, vacancies were not awaited, and rights of succession, under the name of expectatives, were given or sold in advance. The deplorable results of this spiritual commerce were early apparent and formed the subject of bitter lamentation and complaint, but to no purpose. In the thirteenth century Bishop Grosseteste and St Louis assailed it in vigorous terms; in the fourteenth, Bishop Alvar Pelayo, a penitentiary of John XXII, was equally fearless and unsparing in his denunciation. In 1385 Charles V of France asserted in an ordonnance that the Cardinals had absorbed all the preferment in the kingdom—benefices, abbeys, orphanages, hospitals etc.—exacting revenue to the utmost and leaving the institutions disabled and the fabric to fall into ruin. At the Council of Siena, in 1423, the French prelates declared that all the benefices in France were sold by the Curia, so that the churches were reduced to desolation. In 1475 the Abbot of Abbots of the great Cistercian Order complained that all the abbeys in France were held in commendam, and consequently were laid waste. England