Introduction

A roundtable entitled “Belvoir Castle and the Fortified Architecture of Saint John Hospital in Jerusalem” took place on December 1 and 2, 2016 in Lyons, in the premises of the Rhône Departmental Archives. On the occasion of this publication, we wish to thank Mr. Bruno Galland, the Archives’ curator, for his warm and hospitable welcome, Lyon 2 University, the following joint research units: UMR ArAr 5138 (Archaeometry and Archeology) at the Maison de l’Orient et de la Méditerranée, UMR 5648 (H...