Controversial Catholic priest Paul Collins describes the evolution of the office of the papacy over two millennia from St Peter to Pope John Paul II.

The papacy is the greatest and longest-lasting institution in the history of the West. In Upon This Rock, Paul Collins describes the evolution of the office of the papacy over the past two millennia, from St Peter to Pope John Paul II.

Other recent histories of the papacy treat it as a political or social phenomenon. Upon This Rock, on the other hand, examines the links between the teachings of Jesus in the New Testament, the interpretations of his teachings by the Apostles, and the changes and developments in the nature and understanding of the papal office under successive bishops of Rome.

The role and powers of the holders of the papal office have been redefined many times over the centuries. Paul Collins discusses in detail the attitudes, influences and teachings of each of the Popes and sets them in a historical and cultural context, offering an illuminating account of developments and changes in Catholic teaching, theology and liturgy.