Æ21 - Valerian and Gallienus C G I H P

Parium, a Roman colony on the southern shore of the Propontis, maintained an unusually active civic mint through the joint reign of Valerian I and Gallienus — one of the more turbulent stretches of the third-century crisis, bracketed by Valerian's capture by Shapur I at Edessa in 260 AD. The colonial abbreviation C G I H P expanded as Colonia Gemella Iulia Hadriana Pariana, reflecting successive imperial honorifics layered onto the city's title over generations.