Peter, Duke of the Romans

Peter was a mediaeval Roman noble. Like his fathers, 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

Theophylact I, Count of Tusculum 864–924

Theodora

Hugh of Italy 887-924-948 (also married Marozia)

Alberic I of Spoleto d. 925

Marozia 890–937

Pope Sergius III 904–911

Alda, daughter of King Hugh

Alberic II of Spoleto 905–954

David or Deodatus

Pope John XI 931–935

Gregory I, Count of Tusculum

Pope John XII 955–964

Pope Benedict VII 974-983

Pope Benedict VIII Pope 1012–1024

Alberic III, Count of Tusculum d. 1044

Pope John XIX Pope 1024–1032

Peter, Duke of the Romans, Count of Tusculum

Gaius, Count of Tusculum

Octavianus, Count of Tusculum

Pope Benedict IX 1012–1055

Further reading

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