Georaphic and climate conditions of the northern regions are caused that the
mentioned areas have a different trend of cultural, political and historical
point of view than the other areas.
In the general view, all of the southern areas of the Caspian sea are like
each other, but the mentioned areas divided to different parts in history and
each part was continuing its existence separately.
On the general division, the Caspian sea littoral states divided to two
provinces; Gilan and Mazandaran. In historical records, these two provinces
have always the fixed borders and the rulling dynasties of each area were
rulling in their own areas. With the exact studing in historical records, we
meet a little but important area that has a basic role in historical geographe
of Gilan and Mazandaran.
The area, Tonekabon, with the natural borders has establisheda standing
area between Mazandaran and Gilan. "Hodood - al - Alam" is the oldest
geography book that named Tonekabon. Therefore, from the fourth century
Hegira(AH) on, an area with more than 100 kilometers longitude between
Gilan and Mazandaran is mentioned in the records.
Tonekabon takes its name of "Toneka" castle.
"Toneka" castle was in the top of the low hill and controlled the plain
areas. The presentation of Khalatbari dynasty in Tonekabons political arena,
labeled an historical identity to the area.