Charlemagne has relatively little commercial activity in Western Europe. Roads, bridges, infrastructure do not usually exist. In addition, regional travel is not secure, as there is no systematic law enforcement agency. Small villages must take care of themselves; therefore, manufacturing is done only within the range needed to satisfy local needs. In the small kingdom and the principality, the land governed by the king is considered to be the same as other assets.
Since the collapse of the Western Roman Empire in the third century Charlemagne was the first Roman emperor in Western Europe. In 768, the father of Charlemagne "Pepin the Short" died. As the eldest son, Charlemagne inherited the throne. Three years after Frank became king, Charlemagne left Western Europe. He invaded Saxony in 772 AD and crowned the king of Italy in 774 AD. When Charlemagne was awarded "Emperor" by Pope Leo III on Christmas Day, he reached his power in 800 BC. This compulsion brought about major discussion and power struggle between the Pope and the Emperor. This is because the Pope crowned the emperor, which indicates that the Pope elected to give power to the emperor. Charlemagne is also known as Charles the Great or Charles I.
In 799, Pope Leo III was attacked by the Romans. He flew to Charlemagne and asked for his help. Charlemagne rescued his power by helping the pope. This caused Pope Leo III to crown Charlemagne 's "Roman Emperor" at St. Peter's Basilica on 25 December 800. In this way Charlemagne became the first Holy Roman Emperor and founded an empire comparable to the Eastern Roman Empire or Byzantine Empire. Historians consider this to be one of the most important moments in the history of the world.
It is unclear which agreement has been reached, but Charlemagne visited Rome 800 years to support the Pope. At the Christmas ceremony at St. Peters Cathedral, Leo should use Charlemagne's son as his successor. But unexpectedly (maintained), when Charlemagne got up from prayer, the pope placed a crown on his head and praised him as an emperor. Charlemagne expressed dissatisfaction but accepted honor. Because the legal emperor is definitely one of Constantinople, this dissatisfaction may be diplomatic. Nonetheless, this official alliance between the Pope and the rulers of the Germanic family now reflects the reality of Western political power. It began the concept of a new Holy Roman Empire that plays an important role throughout the new Middle Ages.