Priory de Sion versus the World

If anyone want to learn information on this topic you should read "Holy Blood, Holy Grail".

The sequel to HB HG is called The Messianic Legacy, also by Baigent, Leigh, and Lincoln. There are literally dozens of other books that are related, and the subjects to search for them in the library are these: The Knights Templar, Rennes Les Chateaux, Roslyn Chapel in Scotland, The Sinclair journeys to Nova Scotia, Oak Island, and even books on The Ark of the Covenant, and The Order of the Dragon offer additional info.
That should keep ya busy for a while. I started reading this stuff in around '84, with Holy Blood/Holy Grail.