As we know the idea of papacy defined during the First Vatican Council is one of the biggest problems for the unity of Christian Churches. The author of this article attempts to re-interpret the statements of the Council relating to this matter. It will be done against the background of the theology of faith that definitely relates the content of faith (fides quae) to the fides qua. In this way, certain statements regarding faith, also referring to the pope, are relativized, but not in the sense of elimination, but in the sense of their intense reference to the center of biblical faith. We have also the possibility to give every time a new shape of papacy, understood as a “ministry of unity”.