supposed to be a legend?
Look at the upsidedown blackbird on his vest.
Wasn't he crowned at Koeln Cathedral Germany?
https://chronologia.org/en/es_analysis2/index.html
http://www.prometheus-delft.org/internet_tijdschrift/Karel%20de%20Grote.html
Could be a fiction or composite of many other people / rulers.
""Charlemagne has almost certainly never existed and is the result of effected forgery",
though some geneologies claim him as an antecedent.
("Einhard (c. 775-840),[sic] a Frankish scholar and contemporary of Charlemagne, wrote a biography of the emperor after his death. In the work, titled “Vita Karoli Magni (Life of Charles the Great),” he described Charlemagne as “broad and strong in the form of his body and exceptionally tall without, however, exceeding an appropriate measure…His appearance was impressive whether he was sitting or standing despite -having a neck that was fat and too short, and a large belly.”
so that image is unlikely to be an image of "him"?
Looks like a viking there though.
scanning this on "Stolen History"
seems "he" is connected to Vikings. And the later "Charles" King. Carolus
?
https://stolenhistory.net/threads/charlemagne-carolus-rex-and-fomenko.5491/
Pronunciation of that sure does sound like Coen.