King of Denmark, who brings the Viking era to its peak. More than a thousand years ago, Harald Bluetooth raised two Christian stone tablets at the door of the church in Jelling town. It is a sign of the end of Viking era and the beginning of the kingdom of Denmark in world history. Before Harald, the Normans had been active in Europe for five centuries. Their strength has shocked the enemy but has never been the master of this land. Harald took over the territory in the Danework fortification and became the founder of the Kingdom of Denmark. He conquered Norway and set a strong foundation for Normans’ survival. During the reign of Harald, Christianity replaced Odin, and Viking era finally came to its end in spirit. Harald’s outstanding ability in the military and politics helped him establish the Nordic situation lasting for a thousand years. The Normans were lucky to get rid of the dilemma of history and national development because of Harald Bluetooth, and Northern Europe finally set sail for prosperity and civilization again.