Peter, Duke of the Romans

Peter was a medieval Roman noble. Like his father, he carried the illustrious title of Romanorum patricius, consul, dux et senator ("Patrician, consul, duke, and senator of the Romans"), implying his secular command over Rome and its militia. He was the son of Alberic III, Count of Tusculum. As a result, he was a descendant of Theophylact I, Count of Tusculum.

Historians use the term Saeculum obscurum to describe the period when the Papacy was under the direct control of the Roman nobility, in particular when it was under the domination of the family of Theophylact, which later became the Colonna family

Family tree

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Theophylact I, Count of Tusculum
864–924
Theodora
Hugh of Italy
887-924-948
(also married Marozia)
Alberic I of Spoleto
d. 925
HOUSE OF TUSCULUM
Marozia
890–937
Pope Sergius III
904–911
Alda of VienneAlberic II of Spoleto
905–954
David or DeodatusPope John XI
931–935
Gregory I, Count of TusculumOctavian
Pope John XII
955–964
Pope Benedict VII
974-983
Theophylact
Pope Benedict VIII
Pope 1012–1024
Alberic III, Count of Tusculum
d. 1044
Pope John XIX
Pope 1024–1032
Gregory II, Count of TusculumPeter, Duke of the Romans,
Count of Tusculum
Guy/Gaius, Count of TusculumOctavian, Count of TusculumTheophylact
Pope Benedict IX
1012–1055
Gregory III, Count of Tusculum
Ptolemy I of TusculumPeter de Columna
Colonna family

Further reading

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  • George L. Williams. Papal Genealogy: The Families And Descendants Of The Popes


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