Marcianus - Augustus of Imperium Romanum from 450 to 457
Flavius Marcianus Augustus was Roman Emperor in the East from 450 to 457.

Under Marcian's rule and reforms, the Eastern Empire recovered somewhat and was protected from external threats. Because of his isolationist policies, some scholars regard him as a Byzantine emperor rather than a Roman emperor. He left the Western Empire to its fate when first Attila the Hun and later the Vandals ravaged the provinces and finally Rome itself.

Marcian died on 27 January 457 of a disease, possibly gangrene, contracted during a long religious journey.
Marcianus
Emperor Marcianus of the Roman Empire

(1) Marcianus 450-457 AD
Obverse: DN MARCIANVS PF AVG, Pearl diademed, draped, and cuirassed bust right
Reverse: Monogram 1B within wreath
Ref: RIC X 535