Ctesiphon
The Sasanian Capital City

The large round city , situated on the left bank of the Tigris, across the river from the Hellenistic city of Seleucia, has been identified as the great Parthian and Sasanian capital city of Tisfun, known to the Romans as Ctesiphon , the Al-Madain (the cities), of Arabic sources. Situated about 35 km south of the later city of Baghdad, in present-day Iraq, Ctesipon was the first Sasanian foundation in this urban zone, named Veh-Ardashir, the beautiful (good) city of Ardashir, after its founder, the Sasanian king Ardashir I (AD 224-241).