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 popes, Felix III and Gregory I.
Pope Stephen II was born a Roman aristocrat and member of the Orsini family. Stephen was the bishop of Rome from 26 March 752 to his death. Stephen II marks the historical delineation between the Byzantine Papacy and the Frankish Papacy. During Stephen's pontificate, Rome was facing invasion by the Lombards when Stephen II went to Paris to seek assistance from Pepin the Short. Pepin defeated the Lombards and made a gift of land to the pope, eventually leading to the establishment of the Papal States.
Pope John XXI, born Pedro Julião, was the bishop of Rome and head of the Catholic Church from 8 September 1276 to his death. He is the only Portuguese to have been pope. He is sometimes identified with the logician and herbalist Peter of Spain, which would make him the only pope to have been a physician.
Pope Benedict VI was the bishop of Rome and ruler of the Papal States from 19 January 973 to his death in 974. His brief pontificate occurred in the political context of the establishment of the Holy Roman Empire, during the transition between the reigns of Otto I and Otto II, incorporating the struggle for power of Roman aristocratic families such as the Crescentii.
Pope Boniface IV, OSB was the bishop of Rome from 608 to his death. Boniface had served as a deacon under Pope Gregory I, and like his mentor, he ran the Lateran Palace as a monastery. As pope, he encouraged monasticism. With imperial permission, he converted the Pantheon into a church. In 610, he conferred with Bishop Mellitus of London regarding the needs of the English Church. He is venerated as a saint in the Catholic Church with a universal feast day on 8 May.
Antipope Boniface VII, otherwise known as Franco Ferrucci, was a Catholic prelate who claimed the Holy See in 974 and from 984 until 985. A popular tumult compelled him to flee to Constantinople in 974; he carried off a vast treasure, and returned in 984 and removed Pope John XIV (983–984) from office. He is supposed to have put Pope Benedict VI to death. After a brief second rule, he died under suspicious circumstances. He is today considered an antipope.
Pope Gregory V, born Bruno of Carinthia, was the bishop of Rome and ruler of the Papal States from 3 May 996 to his death. A member of the Salian dynasty, he was made pope by his cousin, Emperor Otto III.
Pope Sixtus II, also written as Pope Xystus II, was bishop of Rome from 31 August 257 until his death on 6 August 258. He was martyred along with seven deacons, including Lawrence of Rome, during the persecution of Christians by the Emperor Valerian.
Pope Sergius II was the bishop of Rome and ruler of the Papal States from January 844 to his death in 847. Sergius II's pontificate saw the Arab raid against Rome as well as the city's redevelopment.
Pope Sergius IV was the bishop of Rome and nominal ruler of the Papal States from 31 July 1009 to his death. His temporal power was eclipsed by the patrician John Crescentius. Sergius IV may have called for the expulsion of Muslims from the Holy Land, but this is disputed. Since his time, the practice that the person who has been elected to the office of pope takes on a new name became a tradition.
Pope Formosus was the bishop of Rome and ruler of the Papal States from 6 October 891 until his death on 4 April 896. His reign as pope was troubled, marked by interventions in power struggles over the Patriarchate of Constantinople, the Kingdom of West Francia, and the Holy Roman Empire. Because he sided with Arnulf of Carinthia against Lambert of Spoleto, Formosus's remains were exhumed and put on trial in the Cadaver Synod. Several of his immediate successors were primarily preoccupied by the controversial legacy of his pontificate.
Pope Vigilius was the bishop of Rome from 29 March 537 to his death. He is considered the first pope of the Byzantine papacy. Born into Roman aristocracy, Vigilius served as a deacon and papal apocrisiarius in Constantinople. He allied with Empress Theodora, who sought his help to establish Monophysitism, and was made pope after the deposition of Silverius. After he refused to sign Emperor Justinian I's edict condemning the Three Chapters, Vigilius was arrested in 545 and taken to Constantinople. He died in Sicily while returning to Rome.
Pope Damasus II was the Bishop of Rome and ruler of the Papal States from 17 July 1048 to his death on 9 August that same year. He was the second of the German pontiffs nominated by Emperor Henry III. A native of Bavaria, he was the third German to become pope and had one of the shortest papal reigns.
Pope John XIII was the bishop of Rome and ruler of the Papal States from 1 October 965 to his death. His pontificate was caught up in the continuing conflict between the Holy Roman emperor, Otto I, and the Roman nobility. After long and arduous negotiations, he succeeded in arranging a Byzantine marriage for Otto II, in an effort to legitimize the Ottonian claim to imperial dignity. He also established church hierarchy in Poland and Bohemia.
Pope John XV was the bishop of Rome and ruler of the Papal States from August 985 until his death. A Roman by birth, he was the first pope who canonized a saint. The origins of the investiture controversy stem from John XV's pontificate, when the dispute about the deposition of Archbishop Arnulf of Reims soured the relationship between the Capetian kings of France and the Holy See.
Pope John XVIII was the bishop of Rome and nominal ruler of the Papal States from January 1004 to his abdication in July 1009. He wielded little temporal power, ruling during the struggle between John Crescentius and Emperor Henry II for the control of Rome.
John XVI was an antipope from 997 to 998.
Crescentius the Elder, also known as Crescenzio de Theodora, was a politician and aristocrat in Rome who played a part in the papal appointment.
John Crescentius also John II Crescentius or Crescentius III was the son of Crescentius the Younger. He succeeded to his father's title of consul and patrician of Rome in 1002 and held it to his death.
