History as Chach thumb|left|Coinage of Chach circa 625-725 CE In pre-Islamic and early Islamic times, the town and the province were known as Chach. The Shahnameh of Ferdowsi also refers to the city as Chach.
History as Chach thumb|left|Coinage of Chach circa 625-725 CE In pre-Islamic and early Islamic times, the town and the province were known as Chach. The Shahnameh of Ferdowsi also refers to the city as Chach