The Dossiers Secrets d'Henri Lobineau ("Secret Files of Henri Lobineau"), supposedly compiled by Philippe Toscan du Plantier, is a 27-page document which was deposited in the Bibliothèque nationale de France on 27 April 1967.
The document purports to represent a part of the history of the Priory of Sion, and is widely considered to be a forgery created by Pierre Plantard and Philippe de Chérisey.
This document contains genealogy diagrams which apparently show Plantard to be a descendant of the Merovingian king Dagobert II.
[2] Dossiers Secrets d'Henri Lobineau comprises the following material (along with the 13 pages taken from Généalogie des Rois Mérovingiens): The documents were used as source material by Henry Lincoln (who appeared to be unaware that they were disputed as forgeries) for a series of BBC Two documentaries in the 1970s.
Elements of this work were later used by Dan Brown as sources for his successful novel The Da Vinci Code.