Tepe Hissar is located south of the city of Damghan in the village of Hyderabad (Damghan) and in the province of Semnan. The prehistoric civilization dates back to the 4th millennium BC to the first millennium BC. In the Tepe Hissar, three distinct categories of prehistory were identified, each of which was classified into smaller divisions.
One of the floors on the Tepe Hissar has a gray clay or shining black that is a sign of the Iron Age in Iran. Among the people of this period, metal work has been common; this is clear from the objects obtained. The people who first settled this hill were urban and their important work was agriculture. Herding was also common at this time.
According to the statistics, the dead were layed to the east against sunrise, so it turns out that the sun was considered one of the most important gods of this people, with the advent of black dishes, this rule was abandoned, and along with the dead, they put various objects such as clay dishes, tools, bronze devices, and sometimes weapons of war.
In the second and early part of the third period, there has been a dramatic change in the color, material, construction of dishes, and manner of burial of the dead.
In such a way that the people of Damghan appear to have been invaded by foreigners at this time, and since the black dishes of the third period are closely resembled with the prehistory dishes of the northern regions of Iran, it can be concluded that the invasion was from the north, from the Turkmen desert It has been to Iran, and as we approach the south, the effects of the black containers of the invaders are less visible.