EN
The article presents the achievements of Cardinal Stanisław Nagy in the field of ecclesiology, including the ecumenical context. The main problem is the primacy of the Bishop of Rome as executing the supreme office in the Catholic Church. The article presents the apologetic argumentation concerning the Church’s credibility, called via primatus. It describes the ministry of primacy as the function given to St. Peter the Apostle and his successors, conferred upon him by Jesus Christ, with the purpose of ensuring the unity and permanence of the Church. The article also addresses the problem of the ecumenical quest, where the pope is the most difficult obstacle in the process of unifying Christianity. The last part of the article presents the praxeological aspect of the ministry of primacy in John Paul II’s pontificate.