"Isabeau was raised by the furies to bring about the ruin of the state and to sell it to its enemies; Isabeau of Bavaria appeared, and her marriage, celebrated in Amiens on 17 July 1385, would be regarded as the most horrifying moment in our history". Isabeau was painted as Orléans' passionate lover, and the inspiration for the Marquis de Sade's unpublished 1813 novel Histoire secrète d'Isabelle de Bavière, reine de France, about which Adams writes, "submitting the queen to his ideology of gallantry, [the Marquis de Sade] gives her rapaciousness a cold and calculating violence ... a woman who carefully manages her greed for maximum gratification." She goes on to say that de Sade admitted to "being perfectly aware that the charges against the queen are without ground." Patronage Like many of the Valois, Isabeau was an appreciative art collector. She loved jewels and was responsible for the commissions of particularly lavish pieces of ronde-bosse — a newly developed technique of making enamel-covered gold pieces. Documentation suggests she commissioned several fine pieces of tableaux d'or from Parisian goldsmiths. In 1404, Isabeau gave Charles a spectacular ronde-bosse, known as the Little Golden Horse Shrine, (or Goldenes Rössl), now held in a convent church in Altötting, Bavaria. Contemporary documents identify the statuette as a New Year's gift—an étrennes—a Roman custom Charles revived to establish rank and alliances during the period of factionalism and war. With the exception of manuscripts, the Little Golden Horse is the single surviving documented étrennes of the period. Weighing , the gold piece is encrusted with rubies, sapphires and pearls. It depicts Charles kneeling on a platform above a double set of stairs, presenting himself to the Virgin Mary and child Jesus, who are attended by John the Evangelist and John the Baptist. A jewel encrusted trellis or bower is above; beneath stands a squire holding the golden horse. Isabeau also exchanged New Year's gifts with the Duke of Berry; one extant piece is the ronde-bosse statuette Saint Catherine. Medieval author Christine de Pizan solicited the Queen's patronage at least three times. In 1402, she sent a compilation of her literary argument Querelle du Roman de la Rose—in which she questions the concept of courtly love—with a letter exclaiming "I am firmly convinced the feminine cause is worthy of defense. This I do here and have done with my other works." In 1410 and again in 1411,