Byzantine Empire under the Leonid dynasty

Byzantine Empire Βασιλεία Ῥωμαίων (Ancient Greek) Imperium Romanum (Latin)
457–518
Chi Rho (see Byzantine insignia)
The territory of the Eastern Roman Empire under the Leonid dynasty in 480. The Western Roman Empire, depicted in light purple, collapsed in 476/480, though the regions depicted nominally continued to be under Roman rule as vassals of the Eastern Empire. Orange is the Western Roman rump state at the time of Syagrius, now called the Kingdom of Soissons
Capital	Constantinople
Common languages	Latin, Greek
Government	Monarchy
Emperor
• 457–474	Leo I
• 474–474	Leo II
• 474–491	Zeno
• 475–476	Basiliscus
• 491–518	Anastasius I
History
• accession of Leo I the Thracian	7 February 457
• death of Anastasius I Dicorus	9 July 518
Preceded by Succeeded by Byzantine Empire under the Theodosian dynasty Byzantine Empire under the Justinian dynasty

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Early period (330–717)
Tetrarchy era Constantinian–Valentinianic era (Constantinian dynasty – Valentinianic dynasty) Theodosian era Leonid era Justinian era Heraclian era Twenty Years' Anarchy
Middle period (717–1204)
Isaurian era Nikephorian era Amorian era Macedonian era Doukid era Komnenian era Angelid era
Late period (1204–1453)
Fourth Crusade and Latin rule Latin Empire Principality of Achaea others Byzantine successor states Nicaea Epirus/Thessalonica Trebizond Theodoro Palaiologan era Despotate of the Morea Decline of the Byzantine Empire Fall of Constantinople
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The Eastern Roman Empire was ruled by the Leonid dynasty from AD 457, the accession of Leo I, to 518, the death of Anastasius I. The rule of the Leonid dynasty coincided with the rapid decline, collapse and eventual fall of the Western Roman Empire. Following the end of the Western Empire, Emperor Zeno abolished the position of Western Roman Emperor and declared himself the sole Roman Emperor. The Eastern Roman Empire would come to last for several more centuries, and subsequent dynasties would invest large amounts of resources in attempts to retake the western provinces.

The Leonid dynasty also ruled the Western Roman Empire from 474 to its abolition in AD 480.