BALDWIN IV., the son of Amalric I. by his first wife Agnes, ruled in Jerusalem from 1174 to 1183, when he had his nephew Baldwin crowned in his stead. Educated by William of Tyre, Baldwin IV. came to the throne at the early age of 13 ; and thus the kingdom came under the regency of Raymund II. of Tripoli. The problems of the reign of Baldwin IV. may be said to have been two—his sister Sibylla and the fiery Raynald of Chatillon, once prince of Antioch, then a captive for many years in the hands of the Mohammedans, and since 1176 lord of Krak (Kerak), to the east of the Dead Sea. Sibylla was the heiress of the kingdom ; the problem of her marriage was important. Married first to William of Montferrat, to whom she bore a son, Baldwin, she was again married in 118o to Guy of Lusignan ; and dissensions between Sibylla and her husband on the one side, and Baldwin IV. on the other, troubled the latter years of his reign. Meanwhile, Raynald of Krak took advantage of the position of his fortress which lay on the great route of trade from Damascus and Egypt, to plunder the caravans (1182), and thus helped to precipitate the inevitable attack by Saladin. When the attack came, Guy of Lusignan was made regent by Baldwin IV., but he declined battle and was de posed both from his regency and from his right of succession, while Sibylla's son by her first husband was crowned king as Bald win V. in 1183. For a time Baldwin IV. still continued to be active ; but in 1184 he handed over the regency to Raymund of Tripoli, and in I185 he died.