"Attack of the Crusaders on Constantinople from La Conquête de Constantinople of Geoffreoy de Villehardouin, Venice, ca. 1330.
Fourth Crusade, 1202-1204
Image courtsey Wikimedia: http://commons.wikimedia.org/wiki/File:Crusaders_attack_Constantinople.jpg
The librarians at the Research Desk can assist you with finding published articles and books on your topic and in locating materials in other libraries.
The archivists in Special Collections can help you locate and use manuscript collections as well as the many published books in the Arkansas and Rare Books Collections.