The ancient city of Asak was a part of Simash province in time of ancient Elamite that was later named Parsuash, after the victory of Parsua Aryans. Parani people attacked Seleucid by the command of two brothers, Ashk and Tirdad, before 250 BC. One of the main historical points related to this city is the coronation of Ashk, the Parthian king. Asak was then one of the cities of Parani monarchy that played a vital role in the collapse of Seleucid and the establishment of Parthian empire. Many Parthian and Sassanid coins were found by Aurel Stein from Asak city, on top of the mountain of Nafqatoon, at the beginning of the twentieth century.
In the historiography of the middle ages, ask is a city on the hillside where the fire is always light. However, it is not clear that this is the same permanent fire or oil fire that is called Tashkuh, or volcano because all of them have been mentioned in relation to different times.
In addition, the existence of a high porch, fire temple, cemetery, fortress, epigraph in Pahlavi script and watchtower has been reported in this city. Today, there are the traces of the porch, the adobe reef, a round stone staircase, a fortress of red bricks, the brick battlement, stone rooms, large grindstones with more than five meters width, cisterns namely Kaseh and the pottery fragments in Asak.
There is a water spring boiling from the valley, cedar trees next to it and two pieces of stone carved for dyke. The investigations into the valleys, hills, houses and surrounding villages of Asak and the ancient traces found there, some experts believe Asak to be a city among several cities or villages like Riv-e Ardeshir that made a complex together.
The earthquake and infectious diseases in several periods were the main reasons of the city abundance. Although the ancient city of Ask, called also Asak, is now abundant, it has been tried to be inscribed on the List of Iran National Heritage. Today, the city of Ask is located in Khuzestan province, in the northeast of Henijan and southeast of Dehmolla.