What effect did the crusades have on europe

The crusades of the 11th to 15th century CE have become one of the defining events of the Middle Ages in both Europe and the Middle East. The entire structure of European society changed during the 12th and 13th centuries. The Crusades were a series of religious wars between Christians and Muslims

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studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.