WCCO’s Amelia Santaniello got a sneak peek at the new Diana, A Celebration Exhibition at the Mall of America. Among the pieces is the incredibly iconic wedding dress, worn by Princess Diana. Here’s a few facts you may not have known about the Princess of Wale’s gown.

— The dress designers were Elizabeth and David Emanuel of London’s Mayfair district — who had only been in business for seven years.

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— Diana’s dress was called one of the most closely guarded secret in fashion history.

— From the time of the March announcement that the Emanuels would be making Diana’s dress until the wedding in July, the windows of their Brooke Street couture shop were covered with blinds.

— The dress is made of 25 yards of silk taffeta, 100 yards of tulle and 150 yards of netting for the veil.

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— The 25-foot silk train is the longest in Royal history.

— Diana’s five bridesmaids also wore dresses of ivory silk, modeled closely on her gown.

— Diana kept with tradition and wore an old antique lace, new silk, a borrowed tiara and a small blue bow, sewn into the waistband of her dress.

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— Diana’s shoes had a hidden message on the bottom, which said “C + D.”