Cajetan now himself succeeded in A.D. 1294 as Boniface VIII. The poor monk was confined by him in a tower, where he died. He was afterwards canonized by Pope John XXII. § 96.23. =Temporal Power of the Popes.=--During the 12th and 13th centuries, when the spiritual power of the papacy had reached its highest point, the pope came to be regarded as the absolute head of the church. Gregory VII. arrogated the right of confirming all episcopal elections. The papal recommendations to vacant sees (_Preces_, whence those so recommended were called _Precistæ_) were from the time of Innocent III. transformed into mandates (_Mandata_), and Clement IV. claimed for the papal chair the right of a _plenario dispositio_ of all ecclesiastical benefices. Even in the 12th century the theory was put forth as in accordance with the canon law that all ecclesiastical possessions were the property not of the particular churches concerned but of God or Christ, and so of the pope as His representative, who in administering them was responsible to Him alone. Hence the popes, in special cases when the ordinary revenues of the curia were insufficient, had no hesitation in exercising the right of levying a tax upon ecclesiastical property. They heard appeals from all tribunals and could give dispensations from existing church laws. The right of canonization (§ 104, 8), which was previously in the power of each bishop with application simply to his own diocese, was for the first time exercised with a claim for recognition over the whole church by John XV., in A.D. 993, without, however, any word of withdrawing their privilege from the bishops. Alexander III. was the first to declare in A.D. 1170 that canonization was exclusively the right of the papal chair. The system of Gregory VII. made no claim of doctrinal infallibility for the Holy See, though his ignorance of history led him to suppose that no heretic had ever presided over the Roman church, and his understanding of Luke xxii. 32 made him confidently expect that none ever would. Innocent III., indeed, publicly acknowledged that even the pope might err in matters of faith, and then, but only then, become amenable to the judgment of the church. And Innocent IV., fifty years later, taught that the pope might err. It is therefore wrong to say, “I believe what the pope believes;” for one should believe only what the church teaches. Thomas Aquinas was the first who expressly maintained the doctrine of papal infallibility. He says that the pope alone can decide finally upon matters of faith, and that even the decrees of councils only become valid and authoritative when confirmed by him. Thomas, however, never went the length of maintaining that the pope can by himself affirm any dogma without the advice and previous deliberations of a council.--Kissing the feet sprang from an Italian custom, and even an emperor