Have you ever heard about the oculist conspiracy? No? Based on some recently decrypted documents, there appears to be an ultra secretive group of highly enlightened magi who've remained virtually hidden for hundreds of years by using ciphers and cryptograms to conceal their mysteries and even their very existence. So it's no surprise that very, very few people have heard about this obscure but powerful group.
Most of what is known comes from this Wired article and the discoveries of a collaborate academic effort at Uppsala University and the University of Southern California.