Prince Napoleon Bonaparte, Countess Olympia Arco and a diamond theft The 40ct engagement ring.

The theft of a 40-carat diamond ring made the news and forced a discreet couple, Prince Jean Christophe Napoleon Bonaparte and Countess Olympia von und zu Arco Zinneberg, into the spotlight. But, what is the story behind this impressively big diamond? And who is this man who proposed with a diamond even bigger than Elizabeth