Æ21 - Valerian and Gallienus C G I H P

Parium, a Roman colony on the Propontis coast, maintained its right to strike local bronze through the joint reign of Valerian I and Gallienus — one of the last periods of active provincial coinage in the region before the broader collapse of the Greek Imperial series in the 260s. The colony's issues consistently advertise its colonial status through the abbreviation C G I H P, standing for Colonia Gemella Iulia Hadriana Pariana, a titulature accumulated across successive imperial grants.

Valerian's capture by Shapur I at the Battle of Edessa in 260 effectively ended the joint reign and terminated most remaining provincial mints almost simultaneously.