Prayer For the Conversion of the Infidels by St. Francis Xavier, from the Raccolta (favored by Pope Pius IX)
O Eternal God, Creator of all things, remember that the souls of infidels have been created by Thee out of nothing, and formed after Thine image and likeness. Behold, O Lord, to the dishonour of Thy name, Hell is being filled with these souls. Remember that Jesus Christ, Thy only Son, for their salvation suffered a most cruel death. Do not permit, O Lord, I beseech Thee, that Thy Divine Son be any longer despised by infidels but rather, being appeased by the prayers of Thy Saints and of the Church, the most holy Spouse of Thy Son, vouchsafe to be mindful of Thy mercy; and forgetting their idolatry and their infidelity, bring them also to know Him whom Thou didst send, Jesus Christ, Thy Son, Our Lord, Who is our health, life and resurrection, through Whom we have been saved and redeemed to whom be all glory forever.
Aeterne rerum omnium effector Deus, memento abs te animas infidelum procreatas, easque ad imaginem et similitudinem tuam conditas. Ecce, Do mine, in opprobrium tuum his ipsis infernus impletur. Memento, Jesum Filium tuum pro illorum salute atrocissimam subiisse necem. Noli, quaeso, Domine, ultra permittere, ut Filius tuus ab infidelibus contemnatur; sed precibus sanctorum virorum et Ecclesiae sanctissimi Filii tui Sponsae placatus, recordare misericordiae tuae, et oblitus idololatriae et infidelitatis eorum, dice ut ipsi quoque agnoseant aliquando, quem misisti Dominum Jestum Christum, qui est salus, vita, et resurretico nostra, per quem salvati et liberati sumus: cui sit gloria per infinita saecula saeculorum.