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480
The Holy Roman Empire had survived over a thousand years when it was finally destroyed by Napoleon and the French.

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793
The Vikings first invaded Britain in AD 793 and last invaded in 1066 when William the Conqueror became King of England after the Battle of Hastings.

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800
As a way to acknowledge Charlemagne's power and reinforce his relationship with the church, Pope Leo III was crowned.

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800
Charlemagne reached the height of his power in 800 when he was crowned Emperor of the Romans by Pope Leo III.

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1054
Great Schism may refer to: East–West Schism, between the Eastern Orthodox Church and the Catholic Church.

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1066
In a feudal system, a peasant or worker known as a vassal received a piece of land in return for serving a lord or king, especially during times of war.

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1096-1099
The First Crusade was the first of a number of crusades that attempted to recapture the Holy Land.

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1145-1149
The Second Crusade was started in response to the fall of the County of Edessa in 1144 to the forces of Zengi.

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1189-1192
The Third Crusade was an attempt by the leaders of the three most powerful states of Western Christianity to reconquer the Holy Land.

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1202-1204
Crusaders of Western Europe invaded and sacked the Christian city of Constantinople, capital of the Eastern Roman Empire.

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1215
Magna Carta Libertatum commonly called Magna Carta is a charter of rights.

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1300
The Renaissance is a period in European history, covering the span between the 14th and 17th centuries and marking the transition from the middle ages to modernity.

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1337-1453
rulers of the Kingdom of England, against the French House of Valois, fought over the right to rule the Kingdom of France.

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1340's-early 1350's
A disease caused by the bacterium Yersinia pestis that circulates among wild rodents where they live in great numbers and density.

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1478
The Tribunal of the Holy Office of the Inquisition.