21 In these things, of which We have spoken, We have the greatest hope of consolation and security. But since in all designs, and especially in those which are undertaken for the sake of public safety, it is necessary to add always to human instruments the aid of Almighty God, in Whose power are the wills of individual men no less than the course and fortunes of Empires, therefore we must invoke God by instant prayers, and beseech Him to look upon Italy, which has been enriched and increased by so many of His benefits, and, having taken away every suspicion of peril, ever to preserve in her the Catholic Faith, which is the chief good. For this self same reason let us devoutly implore the Immaculate Virgin Mary, the great Mother of God, the prompter and helper of good counsels, together with her most holy spouse Joseph, the guardian and patron of Christian nations. And with like care we must beseech the great Apostles, Peter and Paul, to guard safely in the Italian people the fruit of their labour, and to keep holy and inviolate amongst their latest posterity the Catholic name which they begot for our fathers with their own blood.
Source: Etsi Nos (Vatican.va)