Æ22 - Valerian and Gallienus COL AVG TRO

Alexandria Troas was a Roman colony — Colonia Augusta Troas — founded by Augustus from the remnants of Antigonus's earlier settlement, and it retained its colonial coinage privileges well into the third century. The joint reign of Valerian and Gallienus represents the last phase of the city's bronze output; provincial coinage in the region collapsed almost entirely after 260, when Valerian's catastrophic capture by Shapur I at the Battle of Edessa destabilized mint operations across the eastern provinces.