Hassan-i Sabbah

Hassan-i Sabbāh (Persian: حسن صباح Hasan-i Sabbāh) or Hassan as-Sabbāh (Arabic: حسن الصباح Ḥasan aṣ-Ṣabbāḥ) (circa 1050–1124)^[1][2] was the leader of the Nizārī Ismā‘īlītes and the founder of the order known as Assassins.^[3] Assassins, who are often referred to as the Hashshashin, was a group of fedayeen.^[4]

Hassan-i Sabbāh was a missionary who converted the Nizari in the late 11th century in the heart of the Alborz Mountains of northern Persia. He later seized a mountain fortress called Alamut.