 In the 18th and 19th centuries historians characterized Isabeau as " an adulterous , luxurious , meddlesome , scheming , and spendthrift queen " , overlooking her political achievements and influence . A popular book written by Louise de Karalio ( 1758 – 1822 ) about the " bad " French queens prior to Marie Antoinette is , according to Adams , where " Isabeau 's black legend attains its full expression in a violent attack on the French royalty in general and queens in particular . " Karalio wrote : " 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 July 17 , 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 Isabeau was painted as Orléans ' passionate lover , and the inspiration for the Marquis de Sade 's unpublished 1813 novel Histoire secrete d 'Isabelle de Baviere , reine de France , about which Adams writes , " submitting the queen to his ideology of gallantry , [ the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 . " 
