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Pope Urban ll makes perhaps the most influential speech, calling for all Christians to start a was with the Muslims. This was was fought over who controlled the "holy land", so only one religion is in control in that area. This was the start of multiple bloody wars over religion, known as Crusades.
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Mutinous Crusader armies invaded and destroyed parts of Constantinople. After the capture, Bladwin of Flanders was crowned Emporer Baldwin l of Constantinople in the Hagia Sophia.
