Other
United States Naval Academy: Timeline for the Crusades and Christian Holy War
The Crusades were a series of Holy Wars called by the popes in defense of the Church. This timeline highlights the causes of the Crusades, battles, and all the major people associated with the Crusades. Included are links to artwork from...
Other
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: Pope Innocent Iii: Reprimand of Papal Legate
This is a primary source document written by Pope Innocent III to the Papal Legate in response to the conquest of Constantinople during the Fourth Crusade.