14. Prince Rainier of Monaco
When Monaco’s Prince Rainier married Grace Kelly, the world stood still. The ceremony itself was held at Monaco’s St. Nicholas Cathedral, which was stuffed to the brim with 600 guests, including Hollywood royalty like Cary Grant, Ava Gardner, and Gloria Swanson, along with the billionaire barons of the day (Conrad Hilton and Aristotle Onassis were there.) The wedding’s attendees were treated to an indulgent feast which included champagne, caviar, lobster, and a massive wedding cake that weighed in at over 200 pounds!