The motif of the Virgin Mary's image was taken by Geoffrey from the 9th-century Historia Brittonum, which describes a battle "in the castle of Guinnion, in which Arthur carried the image of saint Mary the perpetual virgin on his shoulders".
Geoffrey took inspiration for the Virgin Mary's image from the 9th-century Historia Brittonum, which tells the story of a battle in the castle of Guinnion, where King Arthur proudly carried the image of the perpetual virgin Mary on his shoulders.