text: During a rulership controversy in this polity, Isabella of Anjou's marriage to Humphrey of Toron was annulled in favor of a man who was assassinated a few days after taking the crown.
full_question: During a rulership controversy in this polity, Isabella of Anjou's marriage to Humphrey of Toron was annulled in favor of a man who was assassinated a few days after taking the crown. This state denounced illegal confiscation of fiefs in the Assise sur la ligence, issued by its Haute Cour during the rule of Amalric I. At age sixteen, a ruler of this kingdom overcame overwhelming odds at the Battle of Montgisard, and lifted the Siege of Kerak shortly before his death. This kingdom's coat of arms had five golden crosses on a white field. It was ruled by the leprous Baldwin IV, whose successor Guy of Lusignan lost the disastrous Battle of Hattin, after which Saladin captured its main city and provoked the Third Crusade. For 10 points, name this crusader kingdom named for its extremely holy city.
first_sentence: During a rulership controversy in this polity, Isabella of Anjou's marriage to Humphrey of Toron was annulled in favor of a man who was assassinated a few days after taking the crown.
raw_answer: Kingdom of Jerusalem