1931:  Future King and Queen, George, Duke of York (1895 - 1952) and Elizabeth, Duchess of York (1900 - 2002), with their daughters, Princesses Elizabeth (centre) and niece Diana, at Glamis Castle in Angus, Scotland, for the Golden Wedding celebrations of the Earl and Countess of Strathmore, the Duchess' parents.  (Photo by Central Press/Getty Images)