# 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

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