Der entscheidende Eintrag in diesem Thread ist Leguans Verweis auf die Catholic Encyclopedia, und da er dort praktisch unbeachtet geblieben ist, kopiere ich die entsprechende Passage hier noch einmal direkt ein:
Is the pope infallible in issuing a decree of canonization? Most theologians answer in the affirmative. It is the opinion of St. Antoninus, Melchior Cano, Suarez, Bellarmine, Bañez, Vasquez, and, among the canonists, of Gonzales Tellez, Fagnanus, Schmalzgrüber, Barbosa, Reiffenstül, Covarruvias (Variar. resol., I, x, no 13), Albitius (De Inconstantiâ in fide, xi, no 25), Petra (Comm. in Const. Apost., I, in notes to Const. I, Alex., III, no 17 sqq.), Joannes a S. Thomâ (on II-II, Q. I, disp. 9, a. 2), Silvester (Summa, s.v. Canonizatio), Del Bene (De Officio Inquisit. II, dub. 253), and many others. In Quodlib. IX, a. 16, St. Thomas says: "Since the honour we pay the saints is in a certain sense a profession of faith, i.e., a belief in the glory of the Saints [quâ sanctorum gloriam credimus] we must piously believe that in this matter also the judgment of the Church is not liable to error." These words of St. Thomas, as is evident from the authorities just cited, all favouring a positive infallibility, have been interpreted by his school in favour of papal infallibility in the matter of canonization, and this interpretation is supported by several other passages in the same Quodlibet. This infallibility, however according to the holy doctor, is only a point of pious belief. Theologians generally agree as to the fact of papal infallibility in this matter of canonization, but disagree as to the quality of certitude due to a papal decree in such matter. In the opinion of some it is of faith (Arriaga, De fide, disp. 9, p. 5, no 27); others hold that to refuse assent to such a judgment of the Holy See would be both impious and rash, as Francisco Suárez (De fide, disp. 5 p. 8, no 8 ); many more (and this is the general view) hold such a pronouncement to be theologically certain, not being of Divine Faith as its purport has not been immediately revealed, nor of ecclesiastical Faith as having thus far not been defined by the Church.