Liechtenstein's parliament building stands in Peter-Kaiser Platz square in Vaduz, Liechtenstein, on Monday, May 20, 2013. Liechtenstein, an alpine principality once fabled for its banking secrecy laws, remains a place favored by billionaires to stash the holding companies and investment entities that control their assets. Photographer: Valentin Flauraud/Bloomberg via Getty Images
LONDON, UNITED KINGDOM - FEBRUARY 04:  Floral Tributes Left Outside The Late Queen Mother's Home, Clarence House.  (Photo by Tim Graham/Getty Images)
VICTORIA, BC - SEPTEMBER 29:  (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge, Prince George of Cambridge and Princess Charlotte of Cambridge attend a children's party for Military families during the Royal Tour of Canada on September 29, 2016 in Victoria, Canada.  (Photo by Pool/Sam Hussein/WireImage)
(Original Caption) King Abdullah with his son Prince Hussein, Princess Salma, Queen Rania and Princess Iman. (Photo by Maher Attar/Sygma via Getty Images)
LONDON, UNITED KINGDOM - MARCH 30:  Sarah, Duchess Of York Holding Her Baby Daughter, Princess Eugenie  (Photo by Tim Graham/Getty Images)