Most simply put, the problem was that it looked to many people like the pope was claiming that the Byzantine Empire belonged to Charlemagne.
At that time, the terms "Byzantine Empire" and "Holy Roman Empire" were not in use. The Byzantine Empire was officially called the "Roman Empire." Nevertheless, when Pope Leo III crowned Charlemagne as emperor, he called the empire of which Charlemagne was made monarch the "Roman Empire."
We cannot know why Leo did this. It happens that the Byzantine Empire of the time was ruled by Empress Irene, and some people took the pope's action to indicate he regarded the rule by a woman as not legitimate. Other people have claimed that Charlemagne's empire was intended to be a renewal of the West Roman Empire. There might be some motive no one has guessed at.
There are some relevant background facts that might help a person understand this:
Much of the modern terminology is used because it avoids certain causes of confusion. Nevertheless, it obscures the relationship between the ancient Roman Empire and the Byzantine Empire. The term Carolingian Empire has come into use to clarify the relationship between Charlemagne and the Holy Roman Empire, but it might separate the two excessively.
Charlemagne was not crowned emperor of a city. He was crowned Emperor of the Romans, implying that he was ruler of the Roman Empire. There was, and still is, much controversy over this event. We do know know what the intent was or even who was behind it. Charlemagne is said to have taken the position that the coronation was a surprise to him, but many people have found that hard to believe. The Byzantine government, which still called itself the Roman Empire, took issue at the whole thing, as can well be imagined.
Charlemagne was crowned emperor in St. Peter's Basilica, in Rome, on December 25, 800. This act created what historians call the Carolingian Empire, which was ancestral to both the the Holy Roman Empire and the Kingdom of France. Charlemagne is considered Charles I of both countries. At the time of the coronation, and for quite a while after, the empire called itself the Roman Empire. Unfortunately the Byzantine Empire also called itself the Roman Empire. Modern historians use the terms they do to avoid confusion. For more, please use the link below.
Pope Leo III crowned Charlemagne Emperor in St. Peter's Basilica, in Rome, on December 25, 800 AD. At the time he crowned Charlemagne, he referred to the empire as the Roman Empire. Today, historians call Charlemagne's empire the Carolingian Empire, but at the time, people in Western Europe called it the Roman Empire, as Pope Leo III had. The people of the Byzantine Empire of the time, who had always called their country the Roman Empire, and would as long as it existed, were not very happy about this. The Carolingian Empire divided into France, and a country we call the Holy Roman Empire, but which called itself the Roman Empire for some time. If all this sounds confusing, imagine how it sounded to the people of the time. There are a links below.
Charlemagne wascrownedRomanEmperorbyPopeLeoIII. He become the emperor of the Frankish empire which has been called by historiansCarolingianEmpire. The Pope gave him title of Romanemperorto signify that by allying with Charlemagne andcrowninghimemperor, westernEuropeandCatholicismbecameIndependentfrom the Byzantine Empire, which had up to that point controlled parts ofItaly, including Rome and the bishop of Rome (the Pope).
CHARLEMAGNE
Charlemagne
Charlemagne was crowned the new Roman emperor in A.D. 800
Charlemagne was crowned Emperor of the Romans on December 25, 800 AD, in Rome. Today we call he empire the Carolingian Empire to distinguish it from the ancient Roman Empire, the Medieval Roman Empire (Byzantine Empire), and the Holy Roman Empire.
charlemagne...
yes ----- The question of whether Charlemagne was Emperor of Rome was raised as soon as he was crowned emperor. Personally, I would say he was not, but others could disagree, and with some reason. The West Roman Empire was long gone, so clearly he was not emperor of that. The East Roman Empire still existed at the time he was crowned, under the name Empire of the Roman People. Today we call it the Byzantine Empire. Empress Irene, who was its monarch at the time Charlemagne was crowned, was quite upset that Charlemagne was crowned emperor of a country with the same name as her own, especially because it seemed to imply that he was the rightful ruler of her empire. Today, we use the term Carolingian Empire for Charlemagne's empire, and the term Byzantine Empire for Irene's, to avoid confusion. Neither term was used at the time. The Carolingian Empire dissolved, but was reestablished as what we call the Holy Roman Empire, a term used while it existed, though originally, it, too, was called the Roman Empire. The City of Rome, by the way, was not part of either the Carolingian Empire or the Byzantine Empire, but was part of the Papal States.
Charlemagne was not crowned emperor of a city. He was crowned Emperor of the Romans, implying that he was ruler of the Roman Empire. There was, and still is, much controversy over this event. We do know know what the intent was or even who was behind it. Charlemagne is said to have taken the position that the coronation was a surprise to him, but many people have found that hard to believe. The Byzantine government, which still called itself the Roman Empire, took issue at the whole thing, as can well be imagined.
Charlemagne was not crowned emperor of the Romans. He was crowned as the Holy Roman Emperor, which had nothing to do with ancient Rome. The so-called Holy Roman Empire was a Germanic kingdom of the Middle Ages.
Charlemagne was crowned emperor in St. Peter's Basilica, in Rome, on December 25, 800. This act created what historians call the Carolingian Empire, which was ancestral to both the the Holy Roman Empire and the Kingdom of France. Charlemagne is considered Charles I of both countries. At the time of the coronation, and for quite a while after, the empire called itself the Roman Empire. Unfortunately the Byzantine Empire also called itself the Roman Empire. Modern historians use the terms they do to avoid confusion. For more, please use the link below.
Charlemagne was crowned King of the Franks in 768. He was crowned Emperor of the Romans, an empire we now call the Carolingian Empire, in 800. He ruled until he died in 814.
Supported the pope; pope crowned Charlemagne Emperor of the Roman people
He (that is, Charlemagne) was crowned Emperor of the Roman Empire by the Pope.
Pope Leo III crowned Charlemagne Emperor in St. Peter's Basilica, in Rome, on December 25, 800 AD. At the time he crowned Charlemagne, he referred to the empire as the Roman Empire. Today, historians call Charlemagne's empire the Carolingian Empire, but at the time, people in Western Europe called it the Roman Empire, as Pope Leo III had. The people of the Byzantine Empire of the time, who had always called their country the Roman Empire, and would as long as it existed, were not very happy about this. The Carolingian Empire divided into France, and a country we call the Holy Roman Empire, but which called itself the Roman Empire for some time. If all this sounds confusing, imagine how it sounded to the people of the time. There are a links below.