History of the papacy

The history of the papacy traces the development of the office of pope, its institutions, and its religious and political influence from early Christianity to the present.

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Saint Peter: An apostle of Jesus whom Catholic tradition regards as the first bishop of Rome and the first pope. The papacy's traditional foundation rests on Peter's leadership and association with Rome.
Papal conclave: The assembly of cardinals that elects a pope under rules established by the Catholic Church. Election procedures determine who occupies the papal office.
Pope Gregory I: Bishop of Rome from 590 to 604, known for administrative reforms, missionary activity, and pastoral writing. Gregory's leadership strengthened Rome's role during the transformation of the western empire.
Eastern Orthodox Church: A communion of churches that shares ancient Christian traditions but rejects universal papal jurisdiction. Its separation from Rome reflects enduring disagreement over the pope's authority.
Council of Trent: A Catholic council held between 1545 and 1563 that defined doctrine and initiated reforms in response to the Reformation. Its decrees strengthened Catholic discipline and clarified the Church's response to Protestant challenges.
Early Christianity: The diverse Christian communities and movements that emerged in the first centuries CE. The Roman episcopal office took shape within early Christian communities and disputes.
College of Cardinals: The body of senior Catholic clergy who advise the pope and elect his successor. Cardinals became central to papal governance and the selection of popes.
Pope Gregory VII: Bishop of Rome from 1073 to 1085, central to reforming the clergy and asserting papal authority. His conflict with secular rulers epitomized the medieval struggle over appointments and power.
Avignon Papacy: The period from 1309 to 1377 when popes resided primarily in Avignon rather than Rome. Residence outside Rome weakened the papacy's independence and damaged its standing.
First Vatican Council: An ecumenical council held from 1869 to 1870 that defined papal primacy and infallibility. Its definitions formalized central claims about papal authority amid modern political upheaval.