Ardashir I

Type Figure Region Sasanian Persia Time c. 180–242 Also known as Ardashir I Sasanian

Ardashir I was the founder of the Sasanian Persian dynasty, born c. 180 CE and died 242;…

Timeline

c. 205–224Istakhr · FarsArdashir gathered strength in the Fars region, gradually expanding his power, challenging the Parthian central authority, and laying the groundwork for overthrowing the Arsacid dynasty.
224–242Ctesiphon · Sasanian PersiaAfter defeating the Parthians, Ardashir I made Ctesiphon his capital, unified most of the Iranian Plateau, carried out administrative reforms and made Zoroastrianism the state religion, founding the Sasanian Empire.

Encyclopaedia Iranica: Ardashir I i. History https://www.iranicaonline.org/articles/ardasir-i
The Cambridge History of Iran, Volume 3(1): The Seleucid, Parthian and Sasanian Periods — Ehsan Yarshater (ed.) (1983)