Ctesiphon was a town.
 The oldest inhabited places of Ctesiphon were on its eastern side, which in Islamic Arabic sources is called "the Old City" (  Madnah al-'Atqah), where the residence of the Sasanians, known as the White Palace ( ), was located
 Ctesiphon is first mentioned in the Book of Ezra of the Old Testament as Kasfia/Casphia (a derivative of the ethnic name Cas, and a cognate of Caspian and Qazvin)

