We all certainly know about the glorious history and civilization of Iran in very distant times, Choghaznabil is undoubtedly a unique example of this claim. Choghaznabil, a remnant of the ancient city of Dur Ontash, the most important city of the Elamite civilization, is a glorious civilization that ruled the land of Iran before the arrival of the Aryans. This city belongs to 3200 years ago. "Choghaznabil", which is the ancient name of this building, is a local word composed of the two words "Chogha" (in Lori meaning "hill") and Zanbil (meaning "basket"), which refers to the location of the temple that was the hill. They likened it to an inverted basket. This is the temple ziggurat that the Elamites built for their gods.
Choghaznabil is one of the most prominent religious shrines in Iran, built in 1250 BC during the Elamite period. Choghaznabil is located near the ancient city of Susa in the province of Khuzestan and near the ancient region of Haft Tappeh. This structure was the first historical monument in Iran in 1979 to be inscribed on the UNESCO World Heritage List. The building is 5 stories high. It was built 52 meters, of which only 2 floors remain today with a height of about 25 meters. The route to reach Choghaznabil is via Ahvaz-Shush road, which passes through the cities of Shush and Shushtar and along the Dez River. Napirish, the king of Ilam, was built to praise the ancient god Inshushinak, the goddess of guardianship of Susa.
In the main area of Choghaznabil, there are three brick buildings that are built in a circle and the information obtained indicates that they are something like a sundial. Of these three buildings, only one of them has survived to some extent. It is said that these buildings were the basis for the sculptures that existed on all four sides of Choghaznabil, but with a little care it can be understood that they were used to identify the time. Together, these buildings formed a single set, in fact, an observatory or solar calendar to calculate the year and year and extract the calendar, or to identify the first and middle days of each season or the vernal and autumn equinoxes, as well as to determine the autumn revolutions and It was winter. The changes between the angles of the sunscreens are equal to the changes in the angle of the sunrise at the beginning of each season. In fact, the sunscreens have been used to detect shadows at sunrise and sunset.
It can be surprising to the whole world that thousands of years ago Iranians thought of using tools and structures that could account for their year and calendar.