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
Leo I, Prince of Armenia of Armenian Cilicia. It is likely that his mother was the great-granddaughter of Bardas Phokas. When Constantine I died, Leo’s brother Thoros I succeeded him; Leo may have ruled in the eastern part of “the Mountains” during the lifetime of his brother (although the basis of this proposition is not known). Sometime between 1100 and 1103, Count Baldwin II of Edessa gave his sister in marriage to Leo; but the name and origin of his wife are not known with certainty. It is also possible that his wife was Baldwin II’s sister-in-law, a daughter of the Armenian Gabriel of Melitene.