== Gilles de Rais == 

 :Georg Kaiser, Gilles and Jeanne explores Joan of Arc's (historically tenuous) association with the most notorious criminal of her era, Gilles de Rais. 

 What is the basis for the parenthetical assertion?  No modern scholar doubts they fought on the same side and in the same battles for the most important part of her career.  Following her death he helped finance the Orleans miracle play about her and even acted in the production. 

 Some of the other plays on the list are far more historically tenuous.