Rhagai - A settlement in Media also known as Rhagae
Rhagai was a city in what is now Iran. A settlement began here around 6,000 BC as part of the Central Plateau Culture. The settlement was used as a capital by the Arsacids called Rhaga. In Classical Greco-Roman geography it was called Rhagae.

During the Seleucid period, Alexander the Great's general Seleucus I Nicator renamed the city as Europos, honouring his home city in Macedonia. It was one of the capital cities of the Seljuq Empire in the 11th century. In the 13th century after the Mongol conquest the town was severely damaged and it gradually lost its importance in the presence of nearby Tehran.

Modern location: Rey, Iran

(1) Mithradates III 87-79 BCE
Obverse: Bearded bust left wearing tiara with eight-pointed star, pellet ended torque
Reverse: ΒΑΣΙΛΕΩΣ ΜΕΓΑΛΟΥ ΑΡΣΑΚΟΥ ΑΥΤΟΚΡΑΤΟΡΟΣ ΦΙΛΟΠΑΤΟΡΟΣ ΕΠΙΦΑΝΟΥΣ ΦΙΛΕΛΛΗΝΟΣ (Beardless archer wearing bashlyk and cloak seated right on throne, holding bow in right hand)
Ref: Sellwood 31.6