LONDON, UNITED KINGDOM – JUNE 28: King Gustaf VI Adolf of Sweden salutes with queen Louise Mountbattent, queen Elizabeth II and Philip Mountbatten, Duke of Edinburgh on landing at Westminster pier on June 28, 1954, in London, United Kingdom.  (Photo by Keystone-France\Gamma-Rapho via Getty Images)
Queen Elizabeth II with King Faisal of Saudi Arabia (1906 - 1975) travelling to Hyde Park for a military pageant by the King's Troop Royal Horse Artillery, London, 1967. (Photo by McCabe/Express/Hulton Archive/Getty Images)
Polish President Lech Walesa confers with British Queen Elizabeth II while Prince Philip, Duke of Edinburgh (R) chats with a personality, on April 26, 1991, at Windsor Castle, at the end oaf Walesa four-day state visit to Britain.  Walesa is a labour activist who helped form and led (1980-90) communist Poland's first independent trade union, Solidarity. The charismatic leader of millions of Polish workers, Walesa went on to become the president of Poland (1990-95). He received the Nobel Prize for Peace in 1983.   AFP PHOTO GERRY PENNY (Photo credit should read GERRY PENNY/AFP/Getty Images)
LONDON, UNITED KINGDOM - NOVEMBER 29:  The Queen And Prince Philip With President Bill Clinton And His Wife Hillary At Buckingham Palace  (Photo by Tim Graham/Getty Images)
WINDSOR, UNITED KINGDOM - NOVEMBER 06:  Jordanian State Visit Banquet At Windsor Castle. The Queen Making A Toast. King Abdullah Is Next To The Queen , Sophie Countess Wessex At Top Of Picture And Duchess Of Grafton Lady In Waiting At Far Left  (Photo by Tim Graham Picture Library/Getty Images)