Castles are among the structures that have always played important roles in various periods and regions of the
world due to their multiple functions. The Dailam region in northern Iran is one such area where studying its
castles is significant, particularly because of their strategic location, especially during the early Islamic period.
This paper examines the role of these castles in the governance and security of the region, as well as the social,
economic, and defensive stabilizing power of their inhabitants, focusing on the results of excavations conducted
at the Sansiz Castle in Tarom, northern Iran. It appears that, in addition to their administrative role, the defensive
and military advantages of these castles likely contributed to the political, economic, and social influence of the
nobles who inhabited them, as well as the security of the region's population. The conclusion highlights the
constructive role of these fortresses in stabilizing social, economic, and defensive power, making them strategic
sites in the region