Constantinopolis (1204) — the same event in George Akropolites and Villehardouin, The Conquest of Constantinople

George Akropolites: Alexios V Doukas kills Alexios IV and marries his daughter Eudokia.; Villehardouin, The Conquest of Constantinople: The Greek…

What each source says

George Akropolites, History · AD 1204 · Constantinopolis

Alexios V Doukas kills Alexios IV and marries his daughter Eudokia.

illius affinitatem ambiens, statim atque Alexium iugulavit
Location: c.5 · L6901-6903

Villehardouin, The Conquest of Constantinople · AD 1204 · Constantinople

The Greek noble Mourtzouphlos drags Alexios IV from his bed at night, imprisons him and makes himself emperor — Isaac II soon dies as well, and Alexios IV is strangled

Then Mourzuphles assumed the scarlet buskins with the help and by the counsel of the other Greeks
Location: part_01 L2353–L2376 (MOURZUPHLES USURPS THE EMPIRE)

Place: Constantinopolis

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