character: Pope Urban II
topic: Religious influence on political authority in the Holy Roman Empire
grade: 11
subject: History
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character: Emperor Henry IV
topic: Conflict with the Papacy
grade: 11
subject: History
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character: Gregory VII
topic: Investiture Controversy and Papal Reforms
grade: 11
subject: History
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character: Frederick Barbarossa
topic: Papal relations and political power in the Holy Roman Empire
grade: 11
subject: History
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