Baldwin IV of Jerusalem Baldwin IV of Jerusalem Baldwin IV (; ; 1161 – 16 March 1185), called "the Leper", or The Leper King, reigned as King of Jerusalem from 1174 until his death. He was the son of Amalric I of Jerusalem and his first wife, Agnes of Courtenay. Baldwin spent his childhood in his father's court in Jerusalem, having little contact with his mother, Agnes of Courtenay, Countess of Jaffa and Ascalon, and later Lady of Sidon, whom his father had been forced to divorce. Baldwin IV was educated by the historian William of Tyre (later Archbishop of Tyre and Chancellor of
Baldwin I, Latin Emperor since the 1186 treaty. Baldwin V thereupon ruled as Baldwin VIII of Flanders by right of marriage. When Countess Margaret I died in 1194, Flanders descended to her eldest son Baldwin, who ruled as Baldwin IX, Count of Flanders. In 1186, the younger Baldwin had married Marie, daughter of Henry I, Count of Champagne, and Marie of France. The chronicler Gislebert describes Baldwin as being infatuated with his young bride, who nevertheless preferred prayer to the marital bed. Immediately after this arrangement, the count of Hainaut's son Baldwin, thirteen years old, received as wife Marie, the count of Champagne's sister,