The picture tells the entire story of the court B___, Duchess of R___berg. It’s a strange language, though—the economics of color in the late medieval era, the templates of the religious, the indifference to women in love, and the varying devotion to the differing mores of Christianity, framed for you in Gothic arches. Most of you carry around a mere caricature of the medieval world. You assume Puritanical prudery—but the Puritans belong to a later age. So, to the picture, once tucked into a niche at the convent at R___berg. Surely, this is a religious devotional.  Here is surely Mary,…