The Byzantine Empire was the OTL Roman Empire's successor state. They were the most powerful country in the Mediterranean region for hundreds of years, and represented a bastion of Roman might during the Dark Ages. Needless to say, the Empire has much AH potential, and is loved by many AH.Commers for its sheer coolness.
Visigoth survival, Byzantine collapse
Alternate Eastern Roman Empire capitals
WI Justinian killed during Nika Riots ?
Plausibility check: Justinian symbolically moves the empire's capital back to Rome
WI Gunpowder discovered under Justin I of the Eastern Roman Empire ?
Earthquakes and other catastrophes that could have changed the history of the Byzantine Empire
WI Basil II the Bulgar-Slayer had a successor ?
If the empire had won at Yarmuk
Discussion about the pronoia system and its issues
Byzantines restart the Olympic Games
WI: No war between Byzantium and Armenia
Irene marries Charlemagne in 802 (German)
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Battle of Manzikert Points of Divergence
Battle of Myriokephalon 1176 POD
Byzantine victory at Myriokephalon
Myriocephalum 1176 - Comnenus Wins
Comparing Myriokephalon and Manzikert : Which was more decisive ?
Successful Andronikos Komnenos ?
WI the Empire of Nicaea stays in Anatolia ?
WI: No 1204 Sack of Constantinople ?
Plausibility check: Mongol Constantinople
Plausibility check: The Byzantine Empire under the Golden Horde ?
Plausibility check: Serbian Empire conquering Constantinople
Plausibility check: A Limited Roman Restoration in 1356 AD
Discussion and a timeline about the Byzantine Empire
Some more discussion about a surviving Byzantine Empire
Could Constantinople have held out in 1453 ?
Challenge: Multiple Byzantine Successor States
Challenge: Rump Byzantine Empire lasts to present day
How would a surviving Byzantine Empire impact the modern world ?
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WI: Continuing Seljuk Empire ?
Byzantines assimilating Turks ?
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Useful Resources about the Byzantine Empire
Roman Empire Points of Divergence
Ottoman Empire Points of Divergence