During the Umayyad and Abbasid eras, Ahvaz flourished as a center for the cultivation of sugarcane and as the home of many well-known scholars. It is discussed by such respected medieval historians and geographers as ibn Hawqal, Tabari, Istakhri, al-Muqaddasi, Ya'qubi, Masudi, and Mostowfi Qazvini. Nearby stood the Academy of Gundishapur, where the modern-day teaching hospital is said to have been first established.