The “Rennes-le-Château mystery” – as the last 70 years has demonstrated, is everything and anything that is far-fetched and does not fit-in with ordinary history and is not explained by prosaic explanations. Therefore the answer to the question “WHAT HAS THIS GOT TO DO WITH RENNES-LE-CHATEAU?” would be:

Everything and Anything that is rejected by rational and sensible human beings. Anything that nurtures and nourishes a Question Mark to appear....

It’s a reason for an event or situation that suggests a secret, often powerful, and typically malevolent group that is manipulating things behind the scenes, this is one of their great favourites – it can be taken for granted that such theories usually reject the standard or “official” version of events in favour of a hidden plot.

These theories claim that secret plots are organized by elites, governments, and organizations. They are characterized by immunity to evidence, as counterarguments are viewed as part of the cover-up. They are often “self-sealing” – meaning that a lack of evidence is seen as proof of a successful cover-up, and evidence against the theory is dismissed as faked or part of the plot.

The Key Characteristic of the “Rennes-le-Château mystery” conspiracy theorist is the resistance to evidence. Conspiracy theorists often twist evidence against them into proof of their validity.

Psychologists suggest that such people aren't usually “unhinged”, but are reacting to universal human needs. Sharing these beliefs can give people a sense of belonging to a “special” group that knows the “truth”. It's ALWAYS about knowing something that cannot be found out in Schools and Universities. It’s usually too ineffable to mention out loud.