The Liber maiolichinus[1] de gestis pisanorum illustribus ("Majorcan Book of the Deeds of the Illustrious Pisans") is a Medieval Latin epic chronicle in 3,500 hexameters, written between 1117 and 1125, detailing the Pisan-led joint military expedition of Italians, Catalans, and Occitans against the taifa of the Balearic Islands, in particular Majorca and Ibiza, in 1113 - 5. It was commissioned by the commune of Pisa, and its anonymous author was probably a cleric.[2] It survives in three manuscripts. The Liber is notable for containing the earliest known reference to "Catalans" (Catalanenses), treated as an ethnicity, and to "Catalonia" (Catalania), as their homeland.[3]
The Liber, which is the most important primary source for the brief conquest of the Balearics, portrays the expedition as motivated by a desire to free Christian captives held as slaves by the Muslims and to curtail Muslim piracy "from Spain to Greece".[4] Christian zeal is stressed no less than civic pride and the account of the 1113 expedition is prefaced by a history of Pisan - Muslim conflicts in the eleventh century.[5] The Liber is also the earliest source for the raid of the Norwegian king Sigurd Jorsalfar on Formentera, one of the Balearic islands and a hotbed of piracy.