Æ29 - Philip I ΙΕΡΑΠΟΛΕΙΤΩΝ Κ ΕΦΕϹΙΩΝ ΝΕΩΚΟΡΩΝ ΟΜΟΝΟΙΑ

The homonoia ("concord") coinage between Hierapolis in Phrygia and Ephesus reflects a specific diplomatic practice in which rival cities of the imperial East negotiated formal friendship agreements, often timed to coincide with visits by the emperor or his representatives. Under Philip I, such alliances carried practical weight — cities competing for the title of neokoros, "temple warden," needed allies in the imperial court, and Ephesus held multiple neokorate titles that made her a valuable partner. Hierapolis was pressing its own claims aggressively during this period.

The Conventus of Cibyra was the administrative circuit through which Roman judicial authority reached Hierapolis, a detail that shaped which cities it cultivated relationships with.