Élisabeth Arrighi Leseur was a French mystic best known for her spiritual diary and the conversion of her husband, Félix Leseur (1861–1950), a medical doctor and well known leader of the French anti-clerical, atheistic movement.

After her death, her husband found a note by her addressed to himself, that prophesied about his conversion and him becoming a priest. In order to get rid of such "superstition", Félix left for the Marian shrine of Lourdes, wanting to expose the reports of the healings there as fake. At the Lourdes grotto however, he experienced a religious conversion. Félix subsequently published his wife's journal.

In the fall of 1919 he became a Dominican novice. He was ordained a priest in 1923 and spent much of his remaining twenty seven years publicly speaking about his wife's spiritual writings.