Cyzicus, one of the most commercially active cities on the Propontis, struck jointly in the names of Valerian and Gallienus during the years of their co-rule — a period bookended by military catastrophe. The magistrate name ΑΠΟΛΛΩΝΙΔΗΣ appears on a small cluster of issues, helping scholars sequence the civic coinage chronologically within what was an administratively chaotic decade. Valerian's capture by Shapur I at the Battle of Edessa in 260 AD effectively ended joint issues of this type; no Roman emperor had been taken prisoner by a foreign enemy before or since.
Cyzicus, one of the most commercially active cities on the Propontis, struck jointly in the names of Valerian and Gallienus during the years of their co-rule — a period bookended by military catastrophe. The magistrate name ΑΠΟΛΛΩΝΙΔΗΣ appears on a small cluster of issues, helping scholars sequence the civic coinage chronologically within what was an administratively chaotic decade. Valerian's capture by Shapur I at the Battle of Edessa in 260 AD effectively ended joint issues of this type; no Roman emperor had been taken prisoner by a foreign enemy before or since.