Pope Lucius II (died January 13, 1145), born Gherardo Caccianemici dal Orso, was Pope from March 9, 1144 until his death. Born in Bologna, he became canon in his native city, then Cardinal Priest of Santa Croce in Gerusalemme, later treasurer of the Roman Church, papal legate in Germany for Pope Honorius II (1124–30) and later for Pope Innocent II (1130–43). It must be ascribed chiefly to his exertions that Lothair III made two expeditions to Italy for the purpose of protecting Pope Innocent II against the antipope Anacletus II (1130–38). Innocent II appointed him papal chancellor and librarian.