About 35 kilometres southeast of modern-day Baghdad, on the eastern bank of the Tigris, was the ancient city of Ctesiphon. For more than eight centuries, Ctesiphon was the imperial capital of the Parthian and Sasanian dynasties. From 226 to 637 AD, Ctesiphon served as the capital of the Sasanian Empire until up to middle of 7th century. As it grew, Ctesiphon became a thriving commercial centre that merged with the cities on either side of the river, including the Hellenistic city of Seleucia. Fo ... (Read More)