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The Crusades were a series of military campaigns carried out by the pope and carried out by much of Christian Latin Europe, mainly by France of Capetos and Sacro Roman Empire. The crusades, with the initial specific objective of restoring Christian control over the Holy Land, were fought over a period of almost two hundred years, between 1096 and 1291. Later, other campaigns in Spain and Eastern Europe, some of which did not Final until the fifteenth century, received the same qualification. The crusades were held mainly against the Muslims, but also against the pagan, Jewish, Greek Orthodox Christians and Russians, Mongols, Cathars, Hussites, Valdes, Prussians and against political enemies of the popes. The Crusaders took vows and were granted indulgence for the sins of the past

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Feudalism is the denomination of the predominant political system in Western Europe of the central centuries of the Middle Ages (between the 9th and 15th centuries, although there is no agreement among historians about its beginning and duration, and this varies by region), 1 and in Eastern Europe during the Modern Age, characterized by the decentralization of political power; Based on the diffusion of power from the top (where in theory were the emperor or kings) to the base where the local power was effectively exercised with great autonomy or independence by an aristocracy, called nobility, whose titles derived from Rulers of the Carolingian empire (dukes, marquises, counts) or had another origin (barons, knights, etc.).

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When the Franks invaded Rome the boss of they was Charle Magne, Charle Magne also showed an interest in scholary matters including astronomy. He brings the Christianism to Rome

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This is the physical image of Charle Magne

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Charles I the Great, Aachen, 742 - Aix-la-Chapelle, 814) Germanic monarch who restored the Empire in Western Europe. The firstborn son of the king of the Franks, Pepin the Brief, he inherited the Throne at the death of his father (768) and completed it with the eastern territories granted to his brother Carloman, when he died in 771

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Dark Age is called the period of Greek history that runs from the collapse of the Mycenaean world (between 1200 - 1100 BC) to the Greek archaic period (8th century BC), characterized by the scarcity of sources Make reference to the very difficult reconstruction of the historical realities of the mentioned period