Baldwin I (of Jerusalem) (1058-1118), king of Jerusalem (1100-1118), brother of the French Crusader Godfrey of Bouillon. Following service in the First Crusade, Baldwin settled in Edessa (now Sanliurfa, Turkey), a Christian stronghold that he helped to defend against Muslim attacks. He became ruler of Jerusalem on Godfrey's death and assumed the title of king. Subsequently, Baldwin extended Christian power in Palestine, defeated the Muslims at Acre (now Akko) and Sidon (now Sayda), and invaded Egypt.