an Entity references as follows:
De la Conquête de Constantinople (On the Conquest of Constantinople), is the oldest surviving example of historical French prose, and considered to be one of the most important historical sources on the Fourth Crusade. It was written by Geoffrey of Villehardouin, a knight and crusader, who gave his eyewitness account of the successful conquest of the Christian Byzantine Empire's capital city, Constantinople, on April 13, 1204.