the infant Conrad IV of Germany, serving as ruler until 1253. Henry was married three times and had only one child, a son Hugh. The boy succeeded him upon his death in 1253, although he was only two months of age. Hugh died in 1267 at age 14, bringing an end to the first House of Lusignan. Second House of Lusignan Fall of the Templars At that point, Hugh of Antioch, whose maternal grandfather had been Hugh I of Cyprus, took the name Lusignan, thus founding the second House of Lusignan. He succeeded his deceased cousin as King of Cyprus. In 1268, following the execution of Conradin, he was crowned King of Jerusalem. Hugh was frustrated by dealing with the different factions of Jerusalem nobles, and in 1276 he left for Cyprus. Saint Thomas Aquinas wrote On Kingship for Hugh. In 1284 his son John succeeded him as king of Cyprus and Jerusalem, but died one year later. John is believed to have been poisoned by his brother, Henry. In 1291 the last remnants of the Kingdom of Jerusalem were captured by Al-Ashraf Khalil, the Sultan of Egypt. Henry fled to Cyprus and under his rule, that kingdom prospered. He had the "Haute Cour" keep written records for the first time in their history, and developed them from a simple advisory council into a true court that tried criminals. His goal of reclaiming Jerusalem went unfulfilled, despite alliances with Persia and twice requesting Pope Clement V for assistance. King Henry suffered from epilepsy, which incapacitated him at times. Some of the nobles grew unhappy with his rule, and he had his brother, Guy, the Constable of Cyprus, executed for conspiring against him. Their brother Almaric, the Prince of Tyre, overthrew him with help from the Knights Templar. The revolt was quick and non-violent. Almaric became regent of Cyprus and Jerusalem, and Henry was exiled to Armenia. There he was imprisoned by Almaric's brother-in-law King Oshin. Amalric repaired relationships with Venice, Genoa, and the Knights Hospitallers, and became popular among the people. In 1300, the Lusignans, led by Amalric, Prince of Tyre entered into combined military operations with the Mongols under Ghazan to retake the Holy Land, but without success. In 1307 Pope Clement, under pressure from king Philip IV of France ordered that all Templars be arrested and their properties seized, leaving Amalric no choice but to comply. This led