On Jan. 28, 1840, in Paris, France, the Blessed Virgin appeared to Sr. Justine Bisqueyburu, a Seminary Sister of the Daughters of Charity. This began a series of visits which culminated in a special gift of Mary: The Green Scapular.
For more information visit http://www.daughtersofcharity-emmitsburg.org/what_new022.htm

See also a “google” search of the web.