Ctesiphon

Ctesiphon ( ; , Tyspwn or Tysfwn; ; , ; ) was an ancient city in modern Iraq, on the eastern bank of the Tigris, about 35 kilometres (22 mi) southeast of Baghdad. Ctesiphon served as a royal capital of the Iranian empires for over eight hundred years, in the Parthian and Sasanian periods. Ctesiphon was the administrative capital of the Sasanian Empire from 226 to 637 (when it was conquered by the Arabs), or until the conclusion of the Muslim conquest of Persia in 651 AD.

3rd century prophet and founder of Manichaeism

Sassanid-era Persian monument in modern Iraq

'''Al-Mada'in' (, ; Māḥozā''; ) was an ancient metropolis situated on the Tigris in what is now Iraq. It was located between the ancient royal centers of Ctesiphon and Seleucia, and was founded by the Sasanian Empire. The city's name was used by Arabs as a synonym for the Sasanian capital of Ctesiphon, in a tradition that continued after the Arab conquest of Iran.

Asoristan (, , ), also known as Suristan, was the name of the Sasanian province of Assyria and Babylonia from 226 to 637 CE.

Council that legalized the Christian Church in Sassanid Empire (410)

2018 film directed by Pejman Akbarzadeh

or the diocese of Seleucia-Ctesiphon within the province