Pope Lucius II was the head of the Roman Catholic Church from 1144 to 1145. Born in Rome, he was originally named Gherardo Caccianemici dal Orso. His papacy was marked by political struggles, particularly with the city of Rome and the powerful families that influenced its governance. Lucius II is known for his efforts to restore papal authority and strengthen the Church's position in Rome. He faced significant opposition from the nobility and was involved in conflicts with the Roman Senate. His reign was short-lived, as he died in 1145 during a siege of the city.