The Alamut castle concept was done for a series called al Hashashen.
Alamut is a mountain fortress at an altitude of 2163 meters at the central Alborz, in the Iranian stanza of Qazvin, about 100 kilometers from Tehran. In 1090 AD, the Alamut Castle, a mountain fortress in present-day Iran, came into the possession of Hassan-i Sabbah, a champion of the Nizari Ismaili cause.