Based on historical perspective, the person believed to be the prototype of the king of hearts in poker is "Charlemagne."
Charlemagne is often referred to as Charles the Great. Charlemagne was known as the King of the Franks from 768, King of the Lombards from 774, and Emperor of the Romans from 800.
The diagram or picture of Charlemagne is generally believed to be the prototype of king of hearts in poker.
Hence, in this case, it is concluded that the correct answer is "Charlemagne."
Learn more about Charlemagne here: https://brainly.com/question/4768238
