Ctesiphon (Greek: Κτησιφῶν, Ktēsiphôn) was an orator in Athens during the reign of Alexander the Great.
In 336 BC, Alexander the Great's empire was spreading, and many in Athens were opposed to the ongoing wars.
In 336 BC, Ctesiphon proposed that Athens honor Demosthenes for services to the city by presenting him with a golden crown.
This proposal became a political issue, and in 330 BC, Aeschines prosecuted Ctesiphon on charges of legal irregularities.
In his most brilliant speech, On the Crown, Demosthenes effectively defended Ctesiphon and attacked vehemently those who backed Alexander the Great's empire.