
Experts regard the Dossiers Secrets as a fraud. The Priory was not founded in 1099, but in the 1950s. The Priory is almost certainly a 20th-century fraud even the fake society was not interested in goddess worship. The Dossiers do identify members of the Priory of Sion, including Leonardo da Vinci.
The documents were "discovered" in 1975, but not by the library.
Les Dossiers Secrets prove the existence of the Priory of Sion and have been authenticated by experts. The Priory of Sion was founded in 1099 by a French king who charged them with keeping his family secret, which included hidden documents. The Priory of Sion is one of the oldest secret societies and had members like Leonardo and Victor Hugo. "In 1975 Paris's Bibliotheque Nationale discovered parchments known as Les Dossiers Secrets, identifying numerous members of the Priory of Sion, including Sir Isaac Newton, Sandro Botticelli, Victor Hugo and Leonardo da Vinci." ("Fact" page). The Da Vinci Code tells us the following about the Priory of Sion: Is it a real society with famous members, as this book claims? In The Da Vinci Code “Fact: The Priory of Sion - a European secret society founded in 1099 - is a real organization.” These are the opening words of The Da Vinci Code (on a preliminary page before the novel begins), a novel in which the Priory of Sion (Prieuré de Sion in French) plays a central role.