Vintage Imperial Roman Coin Gallienus 253 AD - 268 AD COA ICS HistoricalVintage Imperial Roman coin of Gallienus who ruled from 253 A. D. 268 A. D. Gallienus and his father, Valerian, ruled Rome jointly for six years. After Valerian's defeat, capture, and murder, Gallienus continued to rule on his own for eight more years His reign was marked with constant fighting with Persians and Goths, as well as the forces of the rebel Postumus In the final year of his rule (and his life), Gallienus's soldiers won what proved to be