I read about this Nun a few years ago and if true this an incredible story. The following is an article written about Saint Bernadette. When a body is described as being incorrupt it means that it does not decay after death. The same cannot be said of a body that is well preserved or mummified, or has undergone an embalming process. Most such corpses become stiff, but incorruptible saints remain completely flexible, as if they are only sleeping. This is particularly true of Saint Bernadette whose body is displayed in a glass case at the Convent of Nevers in France. In spite of having died more than 130 years ago, she looks for all the world as if she is about to wake up. It is true that when she was exhumed a second time, the nuns gave her face a light wax mask, but this was done mainly to cover damage caused earlier by washing. A doctor who removed one of her ribs to provide a relic found her body had remained pliable. Pope John XXIII’s body remains intact, but it was embalmed for his lying in state and the Church does not claim that it is incorruptible due to supernatural reasons.