Phantom Time hypothesis

The Phantom Time Hypothesis, as proposed by Heribert Illig, is the theory that the recorded history of the Early Middle Ages (AD 614 – 911), particularly the Carolingian period, is a falsehood that was spread by Otto III and Gerbert d'Aurillac, and that the era described did not take place.

Resources

 * Alan Bellows, "The Phantom Time Hypothesis" (damninteresting.com)