The Kingdom of Jerusalem was a Christian kingdom established in the Levant in 1099 after the First Crusade. It lasted nearly two hundred years, from 1099 until 1291 when the last remaining possession, Acre, was destroyed by the Mamluks. At first the kingdom was little more than a loose collection of towns and cities captured during the crusade. At its height, the kingdom roughly encompassed the territory of modern-day Israel and the Palesti...