Æ28 - Valerian and Gallienus ΕΦΕϹΙΩΝ ΑΡΤΕΜΙϹ

Ephesus retained the right to strike civic bronze well into the joint reign of Valerian and Gallienus, a privilege jealously guarded by the city and tied directly to its status as the assize center of its conventus — the Roman judicial circuit that brought administrators, merchants, and disputes from across western Asia Minor into the city each year. The mint was active but not prolific under this pairing, and the surviving volume of types suggests short, purpose-driven production runs rather than continuous output.

Valerian's capture by Shapur I at the Battle of Edessa in 260 AD effectively ended the joint reign as it had functioned. Civic issues attributable strictly to the post-260 years become difficult to distinguish without explicit titulature.