Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: Chronicle of the Fourth Crusade
Fordham University provides this site with information about Geoffrey de Villehardouin's chronicle of the Fourth Crusade, including the conquest of Constantinople.
Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: The Fourth Crusade 1204
Fordham University provides a collection of writings about the crusade, covering the Fourth Crusade from its initial events to its conclusion.
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.
Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: Robert De Clari: Capture of Constantinople
This is a fourth Crusade account from Dana C. Munro's late 19th-century translation.
Boise State University
History of the Crusades
A class that is available online includes the following Study Units: The Creation of Outremer, Outremer through the Fall of Edessa, Jerusalem Lost, Crusading Fervor, The Last Years and After. Other helpful pages offer timelines, maps,...
Boise State University
European History: The Crusades: The Fourth Crusade
This site covers the Fourth Crusade in-depth. It is broken down into several categories for easier reading.
Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: The Sack of Constantinople
This site from the Fordham University provides Niceta Choniate's first person account of the sacking of Constantinople by the crusaders of the fourth crusade.
Other
Italian Culture: Preparation for the Fourth Crusade
A discussion of the preparation by the Venetians for the Fourth Crusade, along with a discussion of their motives.