Your pope was installed by your college of cardinals who elected him.
With regard to those truths connected to revelation by historical necessity and which are to be held definitively, but are not able to be declared as divinely revealed, the following examples can be given: the legitimacy of the election of the Supreme Pontiff or of the celebration of an ecumenical council, the canonizations of saints (dogmatic facts)
With regard to the nature of the assent owed to the truths set forth by the Church as divinely revealed (those of the first paragraph) or to be held definitively (those of the second paragraph), it is important to emphasize that there is no difference with respect to the full and irrevocable character of the assent which is owed to these teachings. - DOCTRINAL COMMENTARY ON THE CONCLUDING FORMULA OF THE PROFESSIO FIDEI Congregation for the Doctrine of the Faith