Rayy

Rayy (ancient Rhagae), now within the southern suburbs of Tehran in northern Iran, was one of the greatest cities of medieval Persia before its destruction in the Mongol period. The theologian and exegete Fakhr al-Din al-Razi (d. 1210) took his nisba from it, and the Twelver scholar Ibn Babawayh al-Saduq (d. 991) was born and active there; it should not be confused with other towns named Rayy.