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The desk at which Britain's Diana, Princess of Wales, worked at whilst in residence at Kensington Palace, along with a selection of her personal artefacts, chosen by her sons Britain's Prince William, Duke of Cambridge, and Britain's Prince Harry, is pictured during a photocall at Buckingham Palace in London on July 20, 2017, to promote the forthcoming 'Royal Gifts' exhibition. The 'Royal Gifts' exhibition will showcase some of the gifts given to the Queen during her 65-year reign, and is set to run July 22October 1, 2017 at this year's Summer Opening of the State Rooms at Buckingham Palace. / AFP PHOTO / Tolga Akmen (Photo credit should read TOLGA AKMEN/AFP/Getty Images)

The desk at which Britain's Diana, Princess of Wales, worked at whilst in residence at Kensington Palace, along with a selection of her personal artefacts, chosen by her sons Britain's Prince William, Duke of Cambridge, and Britain's Prince Harry, is pictured during a photocall at Buckingham Palace in London on July 20, 2017, to promote the forthcoming 'Royal Gifts' exhibition.
The 'Royal Gifts' exhibition will showcase some of the gifts  given to the Queen during her 65-year reign, and is set to run July 22October 1, 2017 at this year's Summer Opening of the State Rooms at Buckingham Palace. / AFP PHOTO / Tolga Akmen        (Photo credit should read TOLGA AKMEN/AFP/Getty Images)

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LONDON, ENGLAND - JULY 20: Photographs of Princes William and Harry and Princess Diana are displayed on a desk used by Princess Diana in Kensington Palace at the Royal Gifts exhibition at this year's Summer Opening of the State Rooms at Buckingham Palace on July 20, 2017 in London, England. The exhibition features gifts to the Queen during her 65-year reign and runs from 22 July to 1 October 2017. (Photo by Carl Court/Getty Images)

LONDON, ENGLAND - JULY 20:  Photographs of Princes William and Harry and Princess Diana are displayed on a desk used by Princess Diana in Kensington Palace at the Royal Gifts exhibition at this year's Summer Opening of the State Rooms at Buckingham Palace on July 20, 2017 in London, England. The exhibition features gifts to the Queen during her 65-year reign and runs from 22 July to 1 October 2017.  (Photo by Carl Court/Getty Images)