The Duchess of Windsor
Princess Margaret, the Countess of Snowdon
Lady Sarah Chatto
Princess Alice, the Duchess of Gloucester
The Duchess of Gloucester
Princess Marina, the Duchess of Kent
The Duchess of Kent
Princess Alexandra of Kent
Princess Michael of Kent
And that's it for the Windsors! As I said, this is not entirely comprehensive - feel free to add additional rings in the comments. Next time: we leave British shores.
Which one is your favorite?
Photos: Getty Images/Corbis/NYPL/NPG