Ctesiphon

Ctesiphon is an ancient imperial capital on the Tigris that served as a major political centre for the Parthian and Sasanian empires. The site is most famous for the surviving monumental arch of the royal palace known as the Taq Kasra.

The archaeological remains are dispersed across a wide area of ruins and mounds, with the Taq Kasra standing as the dominant surviving structure. The arch forms a vast vaulted iwan of brickwork that illustrates Sasanian engineering and monumental palace architecture.

Additional ruins include foundations of administrative and residential compounds spread along the river plain, visible as low earthworks and scattered masonry. Visits concentrate on the arch and nearby excavated remains rather than a single continuous building complex.

Ctesiphon rose to prominence as a major imperial capital under Parthian then Sasanian rule and remained a key administrative centre until the Arab Muslim conquests of the 7th century CE. The palace complex and arch were part of the royal quarter and were visited and recorded by travelers in later centuries.

The site lies on the east bank of the Tigris in the region historically called al-Mada’in, southeast of the modern city of Baghdad in Iraq.

• Principal ruin: The surviving arch is one of the largest single-span ancient brick vaults in the world and is the principal ruin visited at the site.

What to See #

• Taq Kasra (Arch of Ctesiphon): The Taq Kasra - a monumental brick arch and the best-preserved remnant of the royal palace complex, noted for its vast vaulted iwan and single-span brick vault.