Roman Imperial Gallienus 253-268 AD Antoninianus
Gallienus, also known as Antoninianus, was a Roman emperor who ruled from 253 to 268 AD. His reign was marked by significant military campaigns and the division of the empire between his father Valerian and himself. Gallienus was known for his military successes against usurpers and Germanic tribes, but he was unable to prevent the secession of important provinces. His 15-year reign was the longest in half a century, and he was assassinated in 268 AD. Gallienus' rule is significant in Roman history for its impact on the army, civil-military relations, and imperial practice