Gregory I was the

Count of Tusculum The counts of Tusculum or Tuscolo, 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 ...

sometime between 954 and 1012. Consul et dux 961, vir illustrissimus 980, praefectus navalis 999. He was the son of Alberic II (son of

Alberic I of Spoleto Alberic I (died c. 925) was the Lombards, Lombard Duke of Spoleto from between 896 and 900 until 920, 922, or thereabouts. He was also Margrave of Camerino, and the son-in-law of Theophylact I, Count of Tusculum, the most powerful man in Rome. Lif ...

and

Marozia Marozia, born Maria and also known as Mariuccia or Mariozza ( 890 – 937), was a Roman noblewoman who was the alleged mistress of Pope Sergius III and was given the unprecedented titles ''senatrix'' ("senatoress") and ''patricia'' of Rome by Po ...

), and Alda of Vienne (daughter of Hugh, King of Italy and his second wife, Alda (or Hilda)). His half-brother was

Pope John XII Pope John XII (; 14 May 964), born Octavian, was the bishop of Rome and ruler of the Papal States from 16 December 955 to his death in 964. He was related to the counts of Tusculum, a powerful Roman family which had dominated papal politics for ...

. He held the cities of Galeria, Arce, and Preneste and the title

count palatine A count palatine (Latin ''comes palatinus''), also count of the palace or palsgrave (from German ''Pfalzgraf''), was originally an official attached to a royal or imperial palace or household and later a nobleman of a rank above that of an or ...

, the palace referred to being that of the

Lateran 250px, Basilica and Palace - side view Lateran and Laterano are names for an area of Rome, and the shared names of several buildings in Rome. The properties were once owned by the Lateranus family of the Roman Empire. The Laterani lost their p ...

. He was the first to carry the title "Count of Tusculum" and he passed it to all his descendants. They also received the titles of ''excellentissimus vir (most excellent man) and apostolic rector of

Sant'Andrea Sant'Andrea is the Italian language, Italian name for List of saints named Andrew, St. Andrew, most commonly Andrew the Apostle. It may refer to: Communes in Italy *Castronuovo di Sant'Andrea, Basilicata *Cazzano Sant'Andrea, Lombardy *Mazzarrà ...

, which Gregory received in 980. In 981, Gregory bore the title ''Romanorum consul, dux et senator'': "Consul, duke, and senator of the Romans." As well as being an intimate and ally of the

popes The pope is the bishop of Rome and the visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the pope was the sovereign or head of sta ...

, especially

Sylvester II Pope Sylvester II (; – 12 May 1003), originally known as Gerbert of Aurillac, was a scholar and teacher who served as the bishop of Rome and ruled the Papal States from 999 to his death. He endorsed and promoted study of Science in the medieva ...

, Gregory also served as ''praefectus navalis'' of

Holy Roman Emperors The Holy Roman Emperor, originally and officially the Emperor of the Romans (; ) during the Middle Ages, and also known as the Roman-German Emperor since the early modern period (; ), was the ruler and head of state of the Holy Roman Empire. ...

Otto I Otto I (23 November 912 – 7 May 973), known as Otto the Great ( ) or Otto of Saxony ( ), was East Francia, East Frankish (Kingdom of Germany, German) king from 936 and Holy Roman Emperor from 962 until his death in 973. He was the eldest son o ...

and

Otto II Otto II (955 – 7 December 983), called the Red (), was Holy Roman Emperor from 973 until his death in 983. A member of the Ottonian dynasty, Otto II was the youngest and sole surviving son of Otto the Great and Adelaide of Italy. Otto II was ...

. However, on 6 February 1001, he was named "Head of the Republic" by the Romans for leading the revolt against

Otto III Otto III (June/July 980 – 23 January 1002) was the Holy Roman emperor and King of Italy from 996 until his death in 1002. A member of the Ottonian dynasty, Otto III was the only son of Emperor Otto II and his wife Theophanu. Otto III was c ...

and expelling the

Crescentii The Crescentii (in modern Italian Crescenzi) were a baronial family, attested in Rome from the beginning of the 10th century and which in fact ruled the city and the election of the popes until the beginning of the 11th century. History Severa ...

. In 1002, the latter returned to power and he had to renounce his title. His death is attested before the 11 June 1012, when his successor, Theophylact, was elected

Pope The pope is the bishop of Rome and the Head of the Church#Catholic Church, visible head of the worldwide Catholic Church. He is also known as the supreme pontiff, Roman pontiff, or sovereign pontiff. From the 8th century until 1870, the po ...

Marriage and issue

By his wife Maria (died 1013) he had three sons and a daughter: * Theophylact, who became

Pope Benedict VIII Pope Benedict VIII (; – 9 April 1024) was bishop of Rome and ruler of the Papal States from 18 May 1012 until his death. He was born Theophylact to the noble family of the counts of Tusculum. Unusually for a medieval pope, he had strong aut ...

. * Alberic III who succeeded him in Tusculum and in his titles. * Romanus, who became

Pope John XIX Pope John XIX (; died October 1032), born Romanus, was the Bishop of Rome and ruler of the Papal States from 1024 to his death. He belonged to the family of the powerful Counts of Tusculum, succeeding his brother, Benedict VIII. Papal relatio ...

* Marozia III, who married Thrasimund III of Spoleto. Together, the houses of Tusculum and Spoleto were the dominant secular powers in the central Italian peninsula, the one representative of the imperial power and the other, Gregory's, of papal. {{Authority control 10th-century births 1012 deaths 10th-century Italian nobility People from medieval Rome Medieval Roman consuls Counts of Tusculum