 West of Alamut in the Shahrud Valley, the major fortress of Lamasar served as just one example of such a retreat.In the context of their political uprising, the various spaces of Ismaili military presence took on the name "dar al-hijra" (place of refuge).The notion of the "dar al-hijra" originates from the time of the Prophet Muhammad, who fled with his supporters from intense persecution to safe haven in Yathrib.