Voltaire once said of this man: "A man who knows everything and who never dies" . This man also enjoyed exceptional prestige with many courts of Europe but especially with that of Louis XV. Who was he?

He was speaking of the Comte de St. Germain

http://www.deeptrancenow.com/exc_stgermain.htm

Excellent answer SR, would've been tough with out the quote huh? Interesting character, he was a member of many secret societies around the time of the French Revolution including the Secret Committee of United Friends, Freemasons, Rosicrucians, Illuminati and others. He also spoke Italian, German, English, Spanish, French, Greek, Sanskrit, Arabic, and Chinese. Here is another link on this man: http://user.pa.net/~drivera/6frenchrev.htm