Related articles:
Age of Empires II: The Age of Kings
Barbarossa
Charlemagne
Frederick II, Holy Roman Emperor
Henry IV, Holy Roman Emperor
Holy Roman Emperor
King of Italy
Louis VII of France
Milan
Second Crusade
Third Crusade
University of Bologna
Key terms:
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antipope
bamberg
barbarossa
bavaria
beatrice
burgundy
cities of northern italy
concessions
concordat of worms
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deeds of frederick
duke of swabia
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feudalism
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frederick barbarossa
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henry iv
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henry vi
hohenstaufen
holy land
holy roman emperor
imperial authority
investiture controversy
justinian code
lionheart
lombard
middle ages
northern italian
otto of freising
papacy
pope adrian iv
pope alexander iii
pope gregory vii
renaud
saxony
third crusade
time of frederick barbarossa
welf
when frederick
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