In the 9th to the 10th centuries, various sources refer to Otrar as one of the Ispidjab towns. This is probably related to the fact that the city first submitted to the Caliphate and then to the Samanids. As before, Otrar remained the center of the district which occupied a space of "about one day’s journey in all directions", which is many times mentioned by the chroniclers. The town is also known to have minted its own coinage. Otrar was the cultural center where Abu Nasr al-Farabi was born, and Aristan-Bab, an important representative of Islamic culture, preached here.