A Nineteenth Century Miracle most commonly refers to a book detailing the conversion of the Ratisbonne brothers to Catholicism after they claimed to have seen a vision of the Virgin Mary in 1842. It can also refer to a 1897 mystery novel by Lorin Kaye titled 'A Nineteenth-Century Miracle' about an impossible crime, or a story from 2007 about the medical resuscitation of a baby after a priest's name was invoked.