Jovian - Augustus of Imperium Romanum from 363 to 364
Flavius Iovianus Augustus was Roman Emperor from 363 to 364.

Upon the death of emperor Julian the Apostate during his campaign against the Sassanid Empire, Jovian was hastily declared emperor by his soldiers. He sought peace with the Persians on humiliating terms and reestablished Christianity as the state church.

His reign lasted only eight months; After making peace with the Persians, Jovian decided to rush to Constantinople to consolidate his political position there. While en route, he was found dead in bed in his tent at Dadastana.

His death was officially attributed to either a surfeit of mushrooms or the poisonous carbon monoxide fumes of a charcoal warming fire - but it seems likely that the real cause was of a more sinister nature.
Jovian
Emperor Jovian of the Roman Empire

(1) Jovian 363-364 AD
AE unit Unknown mint
Obverse: Diademed bust right
Reverse: VOT V MVLT X in wreath
Ref: None provided
(2) Jovian AD 363-364
Obverse: DN IOVIANVS PF AVG, Diademed, draped, and cuirassed bust left
Reverse: VOT/ V/ MVLT/ X in four lines within wreath
Ref: RIC VIII 179, Sear 19232
(3) Jovian 363-364 AD
Obverse: pearl-diademed draped and cuirassed bust right; D N IOVIA_NVS P F AVG
Reverse: VOT / V / MVLT / X; within wreath; ASIRM
Ref: RIC VIII Sirmium 118