Boso of Sant'Anastasia

Boso (Italian Bosone) was a Roman Catholic cardinal, priest of Sant'Anastasia al Palatino (1116–1122) and bishop of Turin (1122–1126×28). He was a frequent apostolic legate, making four separate trips to Spain in this capacity. In Spain he proclaimed a crusade to re-conquer the Balearics and held several synods to establish the Gregorian reforms. In Turin, he introduced the truce of God to curb private warfare.

Boso was probably from the Piedmont region of northern Italy, which was at the time part of the Holy Roman Empire. The Piedmontese church had connections with Spain. In 1112, the abbot of San Michele della Chiusa in the Piedmont travelled to Spain to summon its bishops to the council of Benevento being held the following year. He also tried to mediate between the warring married couple, Queen Urraca of Castile–León and King Alfonso of Aragon–Pamplona.

Boso is first recorded as a deacon at the court of Pope Paschal II in Benevento in early January 1113. Of his life before this we know nothing. Later that year, he went to Pisa as the papal legate responsible for overseeing the joint military expedition of the Pisans and the Catalans against the Almoravid-occupied island of Majorca. A first Pisan fleet sailed to Barcelona in 1113, but Boso went with a second fleet, which joined the earlier fleet that had wintered over in the spring of 1114. This was his first legatine visit to Spain. In Catalonia, he held a church council at Girona and proclaimed the crusade indulgence for those who would take part in the Majorcan campaign (June 1114–April 1115). His role in organizing the expedition is recounted in the Liber maiolichinus ("Book of Majorca"), a contemporary Pisan account.

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