Gallienus became co-emperor with his father Valerian in 253. After his father’s capture by the Sasanid King Shapur I, Gallienus struggled to meet the unremitting crises of the empire, and left the East and West to be sorted by others, focusing his attention on the nearest and weakest areas of Italy, North Africa, Egypt, the Danubian provinces, and Greece. The separatist Gallic Empire continued to be run by Postumus, and this almost certainly worked in favor of Rome, as it fostered stability in the area. Zenobia, wife of a loyal client governor of Palymra, assumed her husband’s position upon his death, with considerable success. Gallienus struggled to meet the upheaval around him, however, with invasions and revolts erupting in succession. While trying to quell a mutiny in Mediolanum, he was killed in 268. This coin was minted in his last year, and though the reverse features a horned Diana with her torch, which might seem ominous to modern associations, the message was one of hope. Unfortunately for Gallienus and the Empire, the Third Century Crisis continued to thrive for many years to come. KHK.