Æ25 - Valerian and Gallienus PROVINCIA DACIA, AN VI

Provincia Dacia was an administrative invention of the Roman provincial coinage system — a fictional consolidated entity representing the three Dacian provinces (Dacia Apulensis, Porolissensis, and Malvensis) that never actually unified under that name in administrative practice. The mint struck in the names of co-emperors Valerian and Gallienus following their joint acclamation in 253, using a local era dating (AN VI here counting from the provincia's notional foundation year) that makes precise absolute dating possible — a rare convenience in provincial numismatics.

By year VI the Danubian frontier was under sustained Gothic pressure, and Dacia itself would be effectively abandoned within two decades.