Françoise Mélanie Calvat, (French: [f??~swaz melani kalva]) called Mathieu (7 November 1831 Corps, Isère, France - 14 December 1904 Altamura, Italy), was a French Roman Catholic nun and Marian visionary.
As a religious, she was called Sister Mary of the Cross.
Together with Maximin Giraud, she was one of the two Marian visionaries of Our Lady of La Salette.