Thirteenth-century France saw the construction of the Sainte-Chapelle in Paris to house the Crown of Thorns and other Relics of the Passion which had been purchased by King Louis IX. As a result, a fictitious history that explained how Charlemagne had rescued these Relics from the Saracens and brought them to Paris gained widespread popularity in later medieval France. This history was in the form of an epic poem entitled the Chanson de Fierabras, of which English translations were also made. The history was, in addition, taken to Ireland, where the Irish translation, Sdair Fortibrais developed a wide circulation. However, the Irish text had as its source a Latin translation of the French epic poem. This Latin text is preserved only p...