The Roman Catholic papacy has long been a thorny issue dividing the ecumenical church. In this book several outstanding Lutheran and Catholic theologians, known collectively as the Group of Farfa Sabina, present the results of their five-year dialogue, showing how the papal (Petrine) ministry might actually serve to unify the worldwide communion of churches. Offering biblical, historical, and canonical analyses of key Vatican texts, this volume opens up paths to new and surprising Lutheran-Catholic convergences. The volume as a whole reflects the mutual commitment of Farfa Sabina members to shaping declarations of intent into effective realities.