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800/962-1806
Multi-ethnic complex of territories in Western and Central Europe that developed during the middle ages
This is important because the varying complex of lands in western and central Europe ruled over first by Frankish and then by German kings for 10 centuries. For histories of the territories governed at various times by the empire.

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742-800
King of The Franks from 768, King of the Lombards from 774, and Holy Roman Empire from 800.
He is important because He united much of western and central Europe during the Early Middle Ages. He was the first recognized emperor to rule from western Europe since the three centuries earlier

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800
The pope had summoned him, because he could no longer fend off his enemies in the city. After Charlemagne calmed representatives from both sides and had Leo take an oath of purgation concerning charges of adultery and perjury brought against him.
This is significant because the King of the Franks became a Roman Emperor, with a vast swath of Europe under his rule. The core of his new realm was formed by those countries which, around 1,150 years later, would make up the European Economic Community: France, Germany, the Benelux states and Italy.

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Around 800-1066
The word Viking actually means "to raid" in Old Norse. The Vikings would board their long ships and head across the waters to raid villages on the northern coast of Europe, including islands such as Great Britain and Scotland.

This is significant because the Vikings began to settle in lands outside of Scandinavia. In the 9th century they settled portions of Great Britain, Scotland, Germany, and Iceland. In the 10th century they moved into northeastern Europe including Russia. They also settled along the coast of northern France, where they established Normandy, which means "northmen" and were able to expand their culture with taking over these lands.

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1066
construct designating the social, economic, and political conditions in western Europe during the early middle ages
This is significant because it applied labels that had the most distinctive characteristics during the middle ages

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1096-1099
First crusade attempt to recapture the holy land called for by Pope Urban the second.
This is significant because Jerusalem was captured during this crusade giving the Christian knights of Europe control over the holy land.

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1145-1149
The second crusade was the second major crusade launched from Europe.
This is significant because it created the first Crusade state, but it was also the first to fall.

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1189-1192
Attempt by some leaders of Western Christian states to re-conquer the Holy Land following the capture of Jerusalem by the Ayyubid Sultan, Saladin.
This is important because the Third Crusade shows the beginnings of a Latin re-conquest and a Western pathway into the Holy Land.  Also,  the Siege of Acre could be considered a turning point for the Crusaders in defeating Saladin.

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1204
Latin Christian armed expedition called by Pope innocent the third. The stated intent of the expedition was to recapture the Muslim controller city of Jerusalem by conquering the powerful Egyptian Ayyubid.
This is significant because first conquering the powerful Egyptian Ayyubid Sultanate, the strongest Muslim nation of the time,  the Crusader army capturing the city of Constantinople, the capital of the Greek Christian-controlled Byzantine Empire.

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1054
Patriarch of Constantinople Michael Cerularius was excommunicated from the Christian church based in Rome, Italy. This excommunication severed the largest faction of Christianity, called Chalcedonian Christianity. The split is known as the Great Schism.
This is important because the Great Schism created the two largest denominations in Christianity—the Roman Catholic and Eastern Orthodox faiths.

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1215
Following further discussions with the barons and clerics led by Archbishop Langton, King John granted the Charter of Liberties, known as Magna Carta,
This is significant because the document was drawn up after his barons rebelled and forced him to agree to limitations on his power, because he had demanded heavy taxes to fund his unsuccessful wars in France.

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Renaissance period was about 1300-1600
Although there was no sudden break with the Middle Ages, the Renaissance changed many aspects of people's lives over time medieval European society was based on feudalism. Most people lived on feudal manors in the countryside. The Roman Catholic Church encouraged people to think more about life after death than about daily life on Earth. Except for the clergy, few people were educated.
This is important because

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1337-1453
rulers of the Kingdom of England, against the French House of Valois, over the right to rule the Kingdom of France. Each side drew many allies into the war. It was one of the most notable conflicts of the Middle Ages, in which five generations of kings from two rival dynasties fought for the throne of the largest kingdom in Western Europe.
This is significant because the war marked both the height of chivalry and its subsequent decline, and the development of strong national identities in both countries. Also, the result was the French and its allies so France got to retain the House of Valois.

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1347-1400
It was a disease spread through contact with animals, basically through fleas and other rat parasites
This significance: A quarter of the population was wiped out

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1478
established in 1478 by Catholic Monarchs Ferdinand II of Aragon and Isabella I of Castile.  Also, the Inquisition was a powerful office set up within the Catholic Church to root out and punish heresy throughout Europe and the Americas.
This is significant because the Supreme Sacred Congregation of the Roman and Universal Inquisition still exists, though changed its name a couple of times. It is currently called the Congregation for the Doctrine of the Faith.