Prusa ad Olympum, nestled at the foot of Mount Olympus in Bithynia, was a prosperous city that retained the right to strike local bronze under the joint reign of Valerian and Gallienus — a period of almost unrelenting military crisis during which the empire simultaneously faced Sassanid invasion in the east and Gothic incursions across the Danube. Valerian's capture by Shapur I at Edessa in 260 AD effectively ended the co-reign in practice, making issues attributable to the later portion of this window considerably rarer than those from its opening years.
Prusa ad Olympum, nestled at the foot of Mount Olympus in Bithynia, was a prosperous city that retained the right to strike local bronze under the joint reign of Valerian and Gallienus — a period of almost unrelenting military crisis during which the empire simultaneously faced Sassanid invasion in the east and Gothic incursions across the Danube. Valerian's capture by Shapur I at Edessa in 260 AD effectively ended the co-reign in practice, making issues attributable to the later portion of this window considerably rarer than those from its opening years.