Baldwin III of Jerusalem (born 1130)

Baldwin III was the king of Jerusalem from 1143 until his death. Although he only took up sole rule in 1152 and died young, he was the longest-reigning of the 12th-century kings of Jerusalem. He expanded the borders of the kingdom, paved the way for the later kings' attempts to conquer Egypt, and acted as the defender of the other crusader states in the Levant.