→Late Byzantine era (843-1453)
*1439 Ecclesiastical reunion with the West is attempted at the [[Council of Florence]], where only St. [[Mark of Ephesus]] refuses to capitulate to the demands of the delegates from Rome.
*1448 [[Church of Russia]] declares its independence from the [[Church of Constantinople]].
*1453 [[Fall of Constantinople|Constantinople falls]] to the invasion of the Ottoman Turks.
End of the Roman Empire in the East.
==Post-Imperial era (1453-1821)==