character: Pope Leo IX
topic: Papal Reform Movement
grade: 11
subject: History
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character: Pope Gregory VII
topic: Investment Controversy
grade: 11
subject: History
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character: Pope Urban II
topic: The Crusades and Papal Authority
grade: 11
subject: History
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character: Hildebrand of Sovana
topic: Role in the Gregorian Reform
grade: 11
subject: History
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