It was founded either by Ardashir I in 230 (cf. Encyclopædia Iranica, al-Muqaddasi, et al.) or (according to the Middle Persian ) by his grandson Hormizd I; the cities name either combined Ardashir's name with the Zoroastrian name for God, Ōhrmazd or Hormizd's name with that of his grandfather. It became the seat of the province, and was also referred to as Hūmš�"r.