Proper noun
Ctesiphon
(historical) The ancient capital of Parthia and later of the Sassanid Persian Empire, on the Tigris near Baghdad in present-day Iraq, abandoned in the 7th and 8th centuries.
An audacious plan was formulated whose goal was to lay siege on the Sassanid capital city of Ctesiphon and definitively secure the eastern border. Source: Internet
Barnes, Constantine and Eusebius, 18; Potter, 293. Galerius continued moving down the Tigris, and took the Persian capital Ctesiphon before returning to Roman territory along the Euphrates. Source: Internet
Procopius and the Armenians would march down the Tigris to meet Julian near Ctesiphon. Source: Internet
Ctesiphon By mid-May, the army had reached the vicinity of the heavily fortified Persian capital, Ctesiphon, where Julian partially unloaded some of the fleet and had his troops ferried across the Tigris by night. Source: Internet
Invernizzi, "Ten Years Research in the al-Madain Area, Seleucia and Ctesiphon," Sumer, 32, (1976), 167–175. Source: Internet
Caliph Al-Mansur took much of the required material for the construction of Baghdad from the ruins of Ctesiphon. Source: Internet