Abonoteichos or Abonouteichos (Greek: Ἀβώνου τείχος, Avonou teichos, demonym: Ἀβωνοτειχίτης, Avonoteichites), later Ionopolis (Ἰωνόπολις; Turkish: İnebolu), was an Ancient city in Asia Minor, on the site of modern Inebolu (in Asian Turkey) and remains a Latin Catholic titular see.
Abonoteichos was a town on the coast of Paphlagonia, memorable as the birthplace of the impostor Alexander, founder of the cult of Glycon, of whom Lucian has left us an amusing account in the treatise bearing his name. According to Lucian, Alexander petitioned the Roman emperor (probably Antoninus Pius) that the name of his native place should be changed from Aboniteichos to Ionopolis; and whether the emperor granted the request or not, we know that the town was called Ionopolis in later times.
Not only does this name occur in Marcian of Heraclea and Hierocles, but on coins of the time of Antoninus and Lucius Verus we find the legend Ionopoliton (Ἰωνοπολιτῶν, Ionopoliton), as well as Abonoteichiton (Ἀβωνοτειχιτῶν, Avonotichiton). The modern Turkish name İnebolu is evidently only a corruption of Ionopolis.
It was the site of a 2nd-century AD temple of Apollo