The Gray Nun of Belgium was a 1915 film announced for release on the Alliance Program by Dramatic Feature Films, Frank Joslyn Baum's short-lived successor to The Oz Film Manufacturing Company. Despite the advertising in Motion Picture News announcing its release date, Katharine Rogers, in L. Frank Baum: Creator of Oz, believes that Alliance found the film inferior and refused to distribute it. The exhibition copy, which may have been a work print, may have been the only copy ever struck. Baum himself thought that exchanges and exhibitors dismissed the film "rather arbitrarily" based on the Oz Company name.