Hasan-i Sabbah

Hasan-i Sabbah (c. 1050-1124 CE) was a Persian religious and military leader who founded the Nizari Ismaili state centered at Alamut fortress in northern Iran. A brilliant strategist and scholar, he established a network of fortresses and communities that maintained independence for nearly 170 years. He initiated the da'wa (mission) that spread Nizari Ismailism throughout Persia and Syria.