Ctesiphon

Ctesiphon was a significant city in ancient Mesopotamia, serving as a capital for both the Parthian and Sasanian Empires. Located on the eastern bank of the Tigris River, it was a thriving commercial and political hub. The city witnessed several historical events, including sieges and occupations by the Romans and later the Muslim Arabs. Notable for its grand architecture, the most prominent remaining structure is the Taq Kasra, a massive archway that was part of the Sasanian royal palace. Ctesiphon was one of the largest cities globally during its peak and held a diverse population practicing various religions. Its decline began after the Muslim conquest, as the political and economic center shifted to Baghdad.