حسن الصباح
Hassan-i Sabbah termed his doctrine al-Dawa al-Jadida ("The New Preaching") to contrast the Fatimid "Old Preaching". He was viewed as the Hujjah or "Proof" of the Imam, having direct secret contact with Imam Nizar and his rightful successors. Hassan-i Sabbah is also known as the first of the "Seven Lords of Alamut Castle", as he chose this secluded fortress as his base.