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After the fall of Constantinople in 1204 and the formation of the Latin Empire there were 3 remnants of the Byzantine Empire all claiming legitimacy as successors of the Empire.
1. Empire of Trebizond
2. Empire of Nicaea
3. Despotate of Epirus
I would add also the Latin Empire too as a possible successor
Which one was the most legitimate successor of the Eastern Roman Empire to your opinion? None? All?