The argument: Vittoria Accoromboni, a historical person famous for her beauty, was only 28 when she was murdered together with her brother in 1585, "perhaps too virtuous and too beautiful for her own good." Also the dukes Bracciano de Orsini, Francesco de’Medici and his sister Isabella with the pope Paul IV and Lodovico are historically correct except in timing, as the play has united several different chains of actions into one,
after John Webster’s The White Devil”.