Ctesiphon (Iraq)

Ctesiphon is the name of a very old city at the confluence of the Tigris and Diyala rivers near Baghdad in what is now Iraq. The earliest urban occupations at the site probably represent the Akkadian town of Opis, the capital city of the Babylonia by the 14th century BC. Opis was the site of a battle between the Babylonian King Nabonidus and the Persians (539 BC), and the site of the European revolt against Alexander the Great (324 BC).