In 1425, when Joan was thirteen, she started to hear voices and later a vision of St. Michael, St. Margaret, and St, Catherine. The were telling Joan that she should the Dauphin to Reims for his coronation. Some symbols of Joan of Arc are lilies, The Cross, the Sword, and the Fleur de Lis.
(Thurston, Herbert. "St. Joan of Arc." The Catholic Encyclopedia. Vol. 8. New York: Robert Appleton Company, 1910. 28 Jan. 2018 http://www.newadvent.org/cathen/08409c.htm.)
(Catholic Online. “St. Joan of Arc” )