Byzantine Empire under the Constantinian and Valentinianic dynasties

Roman Empire Βασιλεία Ῥωμαίων (Ancient Greek) Imperium Romanum (Latin)
324–379
Labarum of Constantine Ia Chi Rho (see Byzantine insignia)
The territory of the Eastern Roman Empire, with the Western Roman Empire depicted in pink.
Capital	Constantinople
Common languages	Latin, Greek
Demonym(s)	Roman
Government	Monarchy
Emperor
• 324–337	Constantine I
• 337–361	Constantius II
• 361–363	Julian
• 363–364	Jovian
• 364	Valentinian I
• 364–378	Valens
• 378–379	Gratian
History
• Resignation of Licinius after the Chrysopolis and the Hellespont	19 September 324
• coronation of Theodosius I as Emperor of the East	19 January 379
Preceded by Succeeded by Roman Tetrarchy Byzantine Empire under the Theodosian dynasty
^ Reconstructed from the depiction on a follis minted c. 337. The three dots represent "medallions" which are said to have shown portraits of Constantine and his sons.[1]

Byzantine Empire under the Constantinian and Valentinianic dynasties was the earliest period of the Byzantine history that saw a shift in government from Rome in the West to Constantinople in the East within the Roman Empire under emperor Constantine the Great and his successors. Constantinople, formally named Nova Roma, was founded in the city of Byzantium (Ancient Greek: Βυζάντιον, romanized: Byzántion), which is the origin of the historiographical name for the Eastern Empire, which self-identified simply as the "Roman Empire".

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