https://en.wikipedia.org/wiki/History_of_the_papacy
The history of the papacy, the office held by the pope as head of the Catholic Church, spans from the time of Peter to the present day. Moreover, many of the bishops of Rome in the first three centuries of the Christian era are obscure figures. Most of Peter's successors in the first three centuries following his life suffered martyrdom along with members of their flock in periods of …