Nearly twenty years after its first exhibition devoted to Alfred Dreyfus, the mahJ is returning to the "Affaire" to recall the major stages of this crucial moment in French history, one of the many consequences of which was the law separating Church and State. The exhibition reveals Dreyfus's relentless fight to bring the truth to light, correcting the image of a man who was a bystander to the conspiracy that led him to spend four years in prison and another seven fighting for his rehabilitation.