Pope Cornelius was the bishop of Rome from the 6th, or the 13th of March, 251 A.D., until his martyrdom in June, 253 A.D.
13th century mosaic of St. Cornelius from Santa Maria in Trastevere
Cornelius by Master of Meßkirch
The Martyrdom of Cornelius in the Golden Legend (1497)
Chapel from 1460 dedicated to Cornelius, in Hamme-Mille, Belgium
Gaius Vibius Trebonianus Gallus was Roman emperor from June 251 to August 253, in a joint rule with his son Volusianus.
Pope Cornelius
…election and excommunicated Novatian, but the controversy regarding lapsed members continued for years. The persecutions resumed in 251 under Emperor Trebonianus Gallus. Cornelius was sent into exile and may have died from the rigours of his banishment; possibly he was beheaded. Emperor Decius, who ruled from 249 to…
Detail of a statue of a mid 3rd-century emperor, most likely Trebonianus Gallus.