In 4500 a. C. circa, three kilometers south-west of Kashan, in the place called Tepe Siyalk some tribes lived for which stone and bones were the working tools. Based on the studies conducted, in 4200 BC, without their life system changed, the shape, type, design and color of their pottery changed completely. It seems that the original inhabitants of this area were defeated by tribes who had arrived, whose pottery had the red color with black drawings as distinctive features (examples of the influence of the art of these tribes (3800-4000 BC) were discovered at Cheshm- and Ali at Rey, in Esma'ilabad and on the hills of the Shahriar plain).
The most important findings of Tepe Siyalk are a series of clay tablets Elamite. Apparently 5500 years ago these tribes as a result of contacts with the civilization of Susa, learned the writing and put to memory to Siyalk many tablets of clay with the most ancient type of that spelling.
The civilization of Tepe Siyalk was replaced 3500 years ago by that by the Arians whose works, such as pottery, with representations of horses or the sun, and iron weapons, swords and spears, were found in the different levels of excavation.
In the space between the two hills of the site two ancient necropolises have been discovered that have been named "necropolis A" and "necropolis B". In the "necropolis A" were found works of the tribes of the second millennium BC and in the "necropolis B" works from the end of the second millennium and the beginning of the first millennium BC. The works discovered in the "necropolis B", which belong to the immigrants arrived more recently at Tepe Siyalk, they are rather similar to the works found in the subsoil of Tepe-ye Giyan (Nihavand) and Khorvin (Savojbolagh).