The Necklace Affair was historically significant as one of the events that led to the French populace's disillusionment with the monarchy, which eventually culminated in the French Revolution. - Wikipedia
The Affair of the diamond necklace was a mysterious incident in the 1780s at the court of Louis XVI of France involving the queen Marie Antoinette. It concerned an unsavoury episode in which the wife of Louis XVI, Marie Antoinette, whose reputation was already tarnished by gossip and scandal, was implicated in a crime by contemporary public opinion. .. She was never able to shake off the idea in the public imagination that she had perpetrated a multi-million pound fraud for her own political ends..