In his research, the author presents the document of the Catholic Congregation for the doctrine of the faith, Placuit Deo, which speaks of some aspects of Roman Catholic soteriology. The letter of the PD represents an attempt to actualize the basic moments of Roman Catholic soteriology in the modern world, which is in the processes of cultural transformations and hardly understands and accepts even the basic setting of the teachings of the Catholic Church on salvation, such as the statement of Christ as the only Savior of creation. The author first points to the direct theological connection of that letter with the statement of Dominus Iesus (from 2000), then approaches a theological analysis of the ecclesiological moments of the new document, and in the end makes some conclusions about the importance of this letter from the point of view of comparative theology. The fact that there are texts such as the latest CDF document, inspires the hope that the Roman Catholic thought will persistently focus on the ontology of the koinonia, thereby, together with the Orthodox theology, more direct and consistently will refer to its source, the patristic triadology of the Church, as the source of every theological statement, especially soteriology and ecclesiology. After the research, in the form of an addendum, the author brings a translation from Italian to Serbian of this letter from the magisterium of the Catholic Church.