Sivas

Sivas (medieval Sebasteia), in central Anatolia (modern Turkey), was an important city of the Seljuks of Rum and the Ilkhanids, with notable 13th-century madrasas. The astronomer and polymath Qutb al-Din al-Shirazi (d. 1311), a student of Nasir al-Din al-Tusi, served for a time as a judge in the Anatolian cities including Sivas.