Daughter of a wine merchant, Tripier Jeanne spent her childhood with her grandmother in the countryside. Adult, she lived in Montmartre with her son Gustav, whose father was American. Spiritualism entered her life when she was fifty-eight. It was during this period that she started to experience mental distress. Committed in 1934 for “chronic psychosis, logorrhea and megalomania,” Jeanne Tripier developed, during the ten years of her hospitalization, a vision of the world that she transcribed in her Messages relating her interplanetary travel, or Missions on Earth. “Medium of first necessity, holder of the laws of the planet, and the reincarnation of Joan of Arc,” she created drawings in ink, combined with hair dye, nail polish or pharmaceuticals but also embroideries, her needle constituting a formidable weapon. She uttered prophesies, triggered wars, sometimes using secret codes she called “the spherical language.”