Content:
This publication deals with a scientific and material view at the secret of Madame Royale. The author publish a comparative genetic-morphological study of the expert Prof. Dr. Szilvassy of the "Institut für gerichtliche Medizin der Universität Wien" (Institute for Forensic Medicine of the University of Vienna) about degree of relationship and determination of paternity of K.W. Naundorff (probably Louis XVII) with Marie Antoinette and Louis XVI. 

In the same report was analyzed, whether Marie Thérèse Charlotte of France (Madame Royale) was a true child of Marie Antoinette and Louis XVI, and if the Duchess of Angoulême was the same person as the Madame Royale and whether the Duchess of Angoulême was an illegitimate child of Louis XVI.

By several methods (like genetic-morphological study, super-projection, pathological facial feature, portrait and skull analysis) the expert found the following results: No proof could be found that the Duchess of Angoulême was a true daughter of Marie Antoinette. The Duchess of Angoulême is most probably the illegitimate child of Louis XVI. The Duchess of Angoulême is not the same person as Marie Thérèse Charlotte of France (the Madame Royale).