On Dec. 8, after a two-year investigation by theologians who found no evidence of fraud or heresy and a long history of shrine-related conversions, cures and other signs of divine intervention, Bishop David L. Ricken of Green Bay declared “with moral certainty” that Ms. Brise did indeed have encounters “of a supernatural character” that are “worthy of belief.”

In 1859, the year after Mary is said to have appeared in Lourdes, a Belgian immigrant here named Adele Brise said she was visited three times by Mary, who hovered between two trees in a bright light, clothed in dazzling white with a yellow sash around her waist and a crown of stars above her flowing blond locks. As instructed, Ms. Brise devoted her life to teaching Catholic beliefs to children.