Queen Juana the Mad of Castile

She stabbed her husband's lover in the face and lived with his corpse. Was she mad or manipulated?

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Juana of Castile known as Juana la Loca or Joanna the Mad was haunted by mental health problems. She stabbed a romantic rival in the face and lived with her beloved husband’s corpse. Though it is likely that her husband, father and son exaggerated rumors of her instability to keep her under their control.