Saffarid dynasty
The town fell into decline after the Muslim conquest of Persia, the city surrendering in 638. However, it continued to remain an important centre in the Muslim period. Ya'qub ibn al-Layth al-Saffar, the founder of the Saffarid dynasty, made Gundeshapur his residence three years before his sudden death in 879. His tomb became one of the most prominent sites in the city.