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United States Naval Academy: Papacy and Empire
This comprehensive summary details the history of the strained relationship between the kings and popes during the time period of 955-1356. Their fight for dominance is outlined by date with primary source documents, pictures, artwork,...
Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: Evolution of Crusader Privileges
This site from Fardham University gives information on The "Crusade". Many of the characteristics of the Crusade - the vow, taking the cross, etc. - evolved over time. This selection of texts shows the evolution of the religious legal...