Pope Agapetus I was the bishop of Rome from 13 May 535 to his death. His father, Gordianus, was a priest in Rome and he may have been related to two previous popes, Felix III and Gregory I.
Pope Stephen IV was the bishop of Rome and ruler of the Papal States from June 816 to his death. Stephen belonged to a noble Roman family. In October 816, he crowned Louis the Pious as emperor at Reims, and persuaded him to release some Roman political prisoners he held in custody. He returned to Rome, by way of Ravenna, sometime in November and died the following January.
Pope Sergius I was the bishop of Rome from 15 December 687 to his death, and is revered as a saint by the Roman Catholic church. He was elected at a time when two rivals, Paschal and Theodore, were locked in dispute about which of them should become pope. His papacy was dominated by his response to the Quinisext Council, the canons of which he steadfastly refused to accept. Thereupon Emperor Justinian II ordered Sergius' arrest, but the Roman people and the Italian militia of the exarch of Ravenna refused to allow the exarch to bring Sergius to Constantinople.
Pope Leo II was the bishop of Rome from 17 August 682 to his death. He is one of the popes of the Byzantine Papacy. Described by a contemporary biographer as both just and learned, he is commemorated as a saint in the Roman Martyrology on 28 June.
The Papal States, officially the State of the Church, were a series of territories in the Italian Peninsula under the direct sovereign rule of the pope from 756 until 1870. They were among the major states of Italy from the 8th century until the unification of Italy, between 1859 and 1870.
Pope John III, born Catelinus, was the bishop of Rome from 17 July 561 to his death.
Justinian II, surnamed Rhinotmetos or Rhinotmetus, was the last Eastern Roman emperor of the Heraclian dynasty, reigning from 685 to 695 and again from 705 to 711. Like Justinian I, Justinian II was an ambitious and passionate ruler who was keen to restore the Roman Empire to its former glories, but he responded brutally to any opposition to his will and lacked the finesse of his father, Constantine IV. Consequently, he generated enormous opposition to his reign, resulting in his deposition in 695 in a popular uprising. He only returned to the throne in 705 with the help of a Bulgar and Slav army. His second reign was even more despotic than the first, and it too saw his eventual overthrow in 711. He was abandoned by his army, who turned on him before killing him.
Pope Constantine was the bishop of Rome from 25 March 708 to his death. One of the last popes of the Byzantine Papacy, the defining moment of Constantine's pontificate was his 710/711 visit to Constantinople where he compromised with Justinian II on the Trullan canons of the Quinisext Council. Constantine's was the last papal visit to Constantinople until 1967.
The Donation of Constantine is a forged Roman imperial decree by which the 4th-century emperor Constantine the Great supposedly transferred authority over Rome and the western part of the Roman Empire to the Pope. Composed probably in the 8th century, it was used, especially in the 13th century, in support of claims of political authority by the papacy. In many of the existing manuscripts, including the oldest one, the document bears the title Constitutum domini Constantini imperatoris. The Donation of Constantine was included in the 9th-century collection Pseudo-Isidorean Decretals.
Pope Conon was the bishop of Rome from 21 October 686 to his death. He had been put forward as a compromise candidate, there being a conflict between the two factions resident in Rome— the military and the clerical. He consecrated the Irish missionary St Kilian and commissioned him to preach in Franconia.
Pope Adeodatus II, sometimes called Deodatus, was the bishop of Rome from 672 to his death. He devoted much of his papacy to improving churches and fighting Monothelism.
Pope Sisinnius was the bishop of Rome from 15 January 708 to his death.
Dioscorus was a deacon of the Alexandrian and the Roman church from 506. In a disputed election following the death of Pope Felix IV, the majority of electors picked him to be pope, in spite of Pope Felix's wishes that Boniface II should succeed him. However, Dioscorus died less than a month after the election, allowing Boniface to be consecrated pope and Dioscorus to be branded an antipope.
John Platyn or Platinus was an Exarch of Ravenna.
John III Rizocopus was an Exarch of Ravenna (710).
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 persecution.
The selection of the pope, the bishop of Rome and supreme pontiff of the Roman Catholic Church, prior to the promulgation of In nomine Domini in 1059 varied throughout history. Popes were often appointed by their predecessors or by political rulers. While some kind of election often characterized the procedure, an election that included meaningful participation of the laity was rare, especially as the popes' claims to temporal power solidified into the Papal States. The practice of papal appointment during this period would later result in the jus exclusivae, i.e., a right to veto the selection that Catholic monarchs exercised into the twentieth century.
The Byzantine Papacy was a period of Byzantine domination of the Roman papacy from 537 to 752, when popes required the approval of the Byzantine Emperor for episcopal consecration, and many popes were chosen from the apocrisiarii or the inhabitants of Byzantine-ruled Greece, Syria, or Sicily. Justinian I conquered the Italian peninsula in the Gothic War (535–554) and appointed the next three popes, a practice that would be continued by his successors and later be delegated to the Exarchate of Ravenna.
The Ostrogothic Papacy was a period from 493 to 537 where the papacy was strongly influenced by the Ostrogothic Kingdom, if the pope was not outright appointed by the Ostrogothic King. The selection and administration of popes during this period was strongly influenced by Theodoric the Great and his successors Athalaric and Theodahad. This period terminated with Justinian I's (re)conquest of Rome during the Gothic War (535–554), inaugurating the Byzantine Papacy (537-752).
From 756 to 857, the papacy shifted from the orbit of the Byzantine Empire to that of the kings of the Franks. Pepin the Short, Charlemagne, and Louis the Pious had considerable influence in the selection and administration of popes. The "Donation of Pepin" (756) ratified a new period of papal rule in central Italy, which became known as the Papal States.
