Wikipedia: Hassan-i Sabbāh (Persian: حسن صباح"Ž; 1050s"“1124) was a NizārÄ« Ismā"Ä«lÄ« missionary who converted a community in the late 11th century in the heart of the Alborz Mountains of northern Persia. He later seized a mountain fortress called Alamut and used it as the headquarters for a decentralized Persian insurrection against the dominant Seljuk Turks. He founded a group of fedayeen whose members are often referred to as the Hashshashin, or "Assassins". -- Source of annotation: Marvin or Ruth Sackner.