character: Pope Gregory VII
topic: The Investiture Controversy
grade: 11
subject: History
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character: Henry IV of Germany
topic: The strife for power between the monarchy and papacy
grade: 11
subject: History
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character: Emperor Frederick I (Barbarossa)
topic: Political ramifications of the Investiture Controversy
grade: 11
subject: History
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character: Pope Urban II
topic: Religious influence on political authority in the Holy Roman Empire
grade: 11
subject: History
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