last assassination. The great Assassin Rashid ad-Din Sinan, the Old Man of the Mountain, died in 1193, the same year that claimed Saladin. He died of natural causes at al-Kahf Castle and was buried at Salamiyah, which had been a secret hub of Isma'ili activity in the 9th and 10th centuries. His successor was Nasr al-'Ajami, under the control of Alamut, who reportedly met with emperor Henry VI in 1194. Later successors through 1227 included Kamāl ad-Din al-Hasan and Majd ad-Din, again under the control of Alamut. Saladin left his Ayyubid dynasty under his sons al-Aziz Uthman, sultan of Egypt, al-Afdal ibn Salah ad-Din, emir of Damascus, and az-Zahir Ghazi, emir of Aleppo. Al-Aziz died soon thereafter, replaced by Saladin's brother al-Adil I. 13th century In 1210, Muhammad III died and his son Jalāl al-Din Hasan (known as Hassan III) became Imam of the Nizari Isma'ili State. His first actions included the return to the Islamic orthodoxy by practising Taqiyyah to ensure safety of the Ismailis in the hostile environment. He claimed allegiance to the Sunnis to protect himself and his followers from further persecution. He had a Sunni mother and four Sunni wives. Hassan III recognized the Abbasid caliph al-Nasir who in turn granted a diploma of investiture. The Alamuts had a previous history with al-Nasir, supplying Assassins to attack a Kwarezm representative of shah Ala ad-Din Tekish, but that was more of an action of convenience than formal alliance. Maintaining ties to western Christian influences, the Alamuts became tributaries to the Knights Hospitaller beginning at the Isma'ili stronghold Abu Qubays, near Margat. The count of Tripoli in 1213 was Bohemond IV, the fourth prince of Antioch of that name. That year his 18-year-old son Raymond, namesake of his grandfather, was murdered by the Assassins under Nasr al-'Ajami while at church in Tartus. Suspecting both Assassin and Hospitaller involvement, Bohemond and the Knights Templar laid siege to Qala'at al-Khawabi, an Isma'ili stronghold near Tartus, Appealing to the Ayyubids for help, az-Zahir Ghazi dispatched a relief force from Aleppo. His forces were nearly destroyed at Jabal Bahra. Az-Zahir's uncle al-Adil I, emir of Damascus, responded and the Franks ended the siege by 1216. Bohemond IV would again fight the Ayyudibs in the Fifth Crusade. Majd ad-Din was the new chief da'i in Syria in 1220, assuming that role from Kamāl ad-Din al-Hasan of whom very little is known. At that