"Another inscription that bears witness to the Frankish experience in the Latin East is found on the headstone of Jean de Valenciennes, now kept in the lapidary storage at St. Anne’s church in Jerusalem. Over the years, scholars have put forth several theories concerning the identity of Jean de Valenciennes. Contrary to previous assertions, current research suggests that he was neither a Frankish knight of the twelfth century, nor the lord of Haifa who took part in the Seventh Crusade and who died in 1270. Instead, a comparison of previously-neglected ecclesiastical sources leads us to identify him as a canon who lived in Acre during the first half of the thirteenth century. [H]is grave continues to mystify scholars, since the epitaph remains unfinished and, unlike most funerary inscriptions, is not preceded by a cross." Claverie 2020 Claverie, Pierre-Vincent (2020). Frankish Epigraphy. The French of Outremer, Fordham University.
Strayer, Joseph R. (1977). "The Crusades of Louis IX". In Wolff, Robert L. and Hazard, H. W. (eds.). A History of the Crusades: Volume II, The Later Crusades 1187-1311. Madison: The University of Wisconsin Press. pp. 487-521.