Alamut Fortress was once a mountain fortress located in the central Alborz mountains south of the Caspian Sea near Qazvin province, about 100 Km from Tehran. Suggested explanations for its name are “Eagel’s Nest” and Eagels Teaching. According to legend, an eagle indicated the site to a Daylamite ruler, hence he name ,from eagle and amut . Some 20 citadels, including the famous Alamut Fortress, are scattered in Alamut. The first fortress was built in 840 at and elavation.