Have you checked out the Rosicrucians?
Saving "mark" on forehead: A CROSS?
Correction: In my prior two posts I sometimes used the spelling "Parson" and at other times I used the spelling "Parsons". The spelling "Parson" is incorrect for the name of the scholar I referring to, instead his name is "Parsons".
Terry, I have done a tiny amount of research about the Rosicrucians but no more than that.
Folks, one example of an atheist claiming that Christianity existed long before Christ is the book called Christianity before Christ by John G. Jackson and published by American Atheist Press. But I haven't read that book.
On second thought there there doesn't seem to be much in common with what Parsons wrote and with what Jacobovici said.