Order of the Guardian Moon
A group from long ago.
Story is Order of the Guardian Moon found a powerful book called the Black Star. Fearing what such power could do in the hands of man they tried to destroy it. The book was too powerful to be destroyed so the order ripped out all the pages and scattered them. These hidden sanctuaries are marked with a white circle, representing the full moon. Only on the full moon do these become visible and can be opened.