Alamut (Persian: الموت, meaning "eagle's nest") is a ruined mountain fortress located in the Alamut region in the South Caspian, near the village of Gazor Khan in Qazvin Province in Iran, approximately 200 km (130 mi) from present-day 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. Until 1256, Alamut functioned as the headquarters of the Nizari Ismaili state, which included a series of strategic strongholds scattered throughout Persia and Syria, with each stronghold being surrounded by swathes of hostile territory.