The Knights Hospitaller were established in around 1099 to take care of pilgrims in the Holy Land. The Order was sanctioned by a papal bull in 1113, and eventually its role changed to include the defence of pilgrims as well. By the mid-12th century, the Order had purchased its first transport ships. Eventually, it began building its own ships, and had a shipyard in Acre. In the 1280s, the Order sent some ships to support the Aragonese Crusade.