What 3 countries were formed following the death of charlemagne

In 813, Charlemagne crowned his son Louis the Pious (778-840), king of Aquitaine, as co-emperor. Louis became sole emperor when Charlemagne died in January 814, ending his reign of more than four decades. At the time of his death, his empire encompassed much of Western Europe

Explanation:

byzantine empire is the answer i think you are looking for.

hope this : )

i would think i'ts d hope this out