Rhesaena was a Severan foundation on the Khabur River — Septimius Severus elevated it to colonial status, which accounts for the ΣΕΠ ΚΟΛ in the city's titulature. The L III P in the legend denotes the city's third regnal year reckoning under Trajan Decius, a local dating convention that makes precise die sequencing possible despite the reign lasting barely two years before Decius fell at Abritus in 251, the first Roman emperor killed in battle against a foreign enemy.
Rhesaena was a Severan foundation on the Khabur River — Septimius Severus elevated it to colonial status, which accounts for the ΣΕΠ ΚΟΛ in the city's titulature. The L III P in the legend denotes the city's third regnal year reckoning under Trajan Decius, a local dating convention that makes precise die sequencing possible despite the reign lasting barely two years before Decius fell at Abritus in 251, the first Roman emperor killed in battle against a foreign enemy.