only this foot of the column remains from the apadana of hamedan. several checkered architectural sites with regular repeating patterns, vast furnaces for making materials, and other architectural sites that took years for archaeologists to discover. what has been their use ? types of construction, mathematics, geometry, that is, in fa in the range of 17 and a half. architectural works are built in the form of turning left to right, north to south , this architectural system does not exist in the world, as a result of this architectural style , it is unique in the world in hamedan during more than 110 years. 20 seasons of exploration have been carried out, from french and german archaeologists to iranian archaeologists. dr. aznoush recorded important findings about hamadan and others after him. we discovered an achaemenid material market sequence. rather than being reminiscent of soldiers' houses, these spaces are reminiscent of isfahan bazaar, kashan bazaar, kerman bazaar, and bazaars of other historical iranian cities due to their placement next t