Queen Elizabeth II and Prince Philip arriving at the State Opera House in Vienna during a State Visit to Austria on 7th May 1969. (Photo by Ray Bellisario/Popperfoto via Getty Images/Getty Images)
Queen Elizabeth II and Prince Philip arriving at the State Opera House in Vienna during a State Visit to Austria on 7th May 1969. (Photo by Ray Bellisario/Popperfoto via Getty Images/Getty Images)