Libellus de imperatoria potestate in urbe Roma is an anonymous Latin treatise on the authority of the Holy Roman Emperor in the city of Rome. It has been dated to between the late 9th century and the middle of the 10th. It was probably written at Spoleto. [1] It survives in one manuscript, which was appended to the contemporary Chronicon of Benedict of Sant'Andrea. [lower-alpha 1]
The Libellus argues for the authority of the Holy Roman Emperor in the so-called "patrimony of Saint Peter". [3] [lower-alpha 2] The author clearly sides with the Emperor Louis II against Pope Nicholas I. [1]
Ferdinand Gregorovius calls its author an "Imperialist" and a "partisan", and doubts the accuracy of his claim that "[the emperor's] legate resides in Rome at all times". [lower-alpha 3] According to Eleanor Duckett, the author of the Libellus "poured out his feelings into that interesting document". [5]
Pope Agapetus II was the bishop of Rome and ruler of the Papal States from 10 May 946 to his death. A nominee of the princeps of Rome, Alberic II of Spoleto, his pontificate occurred during the period known as the Saeculum obscurum.
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Pope Stephen VIII was the bishop of Rome and nominal ruler of the Papal States from 14 July 939 to his death. His pontificate occurred during the Saeculum obscurum, when the power of popes was diminished by the ambitious counts of Tusculum, and was marked by the conflict between his patron, Alberic II of Spoleto, and King Hugh of Italy.
Pope Stephen IX was the Bishop of Rome and ruler of the Papal States from 3 August 1057 to his death on 29 March 1058. He was a member of the Ardenne-Verdun family, who ruled the Duchy of Lorraine, and started his ecclesiastical career as a canon in Liège. He was invited to Rome by Pope Leo IX, who made him chancellor in 1051 and one of three legates to Constantinople in 1054. The failure of their negotiations with Patriarch Michael I Cerularius of Constantinople and Archbishop Leo of Ohrid led to the permanent East–West Schism. He continued as chancellor to the next pope, Victor II, and was elected abbot of the Benedictine monastery of Montecassino.
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Benedict X, born Giovanni, was elected to succeed Pope Stephen IX on 5 April 1058, but was opposed by a rival faction that elected Nicholas II. He fled Rome on 24 January 1059 and is today generally regarded as an antipope.
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Pope John XI was the bishop of Rome and nominal ruler of the Papal States from March 931 to his death. The true ruler of Rome at the time was his mother, Marozia, followed by his brother Alberic II. His pontificate occurred during the period known as Saeculum obscurum.
Pope John X was the bishop of Rome and nominal ruler of the Papal States from March 914 to his death. A candidate of the counts of Tusculum, he attempted to unify Italy under the leadership of Berengar of Friuli, and was instrumental in the defeat of the Saracens at the Battle of Garigliano. He eventually fell out with Marozia, who had him deposed, imprisoned, and finally murdered. John’s pontificate occurred during the period known as the Saeculum obscurum.
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Theophylact I was a medieval count of Tusculum who was the effective ruler of Rome from around 905 through to his death in 924. His descendants controlled the papacy for the next 100 years.
The Battle of Garigliano was fought in 915 between Christian forces and the Saracens. Pope John X personally led the Christian forces into battle. The aim was to destroy the Arab fortress on the Garigliano River, which had threatened central Italy and the outskirts of Rome for nearly 30 years.
The counts of Tusculum, also known as the Theophylacti, were a family of secular noblemen from Latium that maintained a powerful position in Rome between the 10th and 12th centuries. Several popes and antipopes during the 11th century came from their ranks. They created and perfected the political formula of noble-papacy, wherein the pope was arranged to be elected only from the ranks of the Roman nobles. The Pornocracy, the period of influence by powerful female courtesans of the family, also influenced papal history.
Matteo Orsini was an Italian Dominican friar and Cardinal.
The October 1187 papal election was convoked after the death of Pope Urban III. He and the papal court had escaped from the imperial blockade of Verona only the month before, and had taken refuge in Ferrara. The election, held in Ferrara the day after the pope's death, resulted in the election of Cardinal Alberto Sartori di Morra, who took the name of Gregory VIII. He was a partisan of the Emperor Frederick Barbarossa, whose election delighted him. Gregory VIII reigned only two months.
The Tusculan Papacy was a period of papal history from 1012 to 1048 where three successive relatives of the counts of Tusculum were installed as pope.
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