Royal protocol said that black should only be worn during periods of mourning, but Diana wasn’t one to follow the rules. She wore this black velvet gown to the 1985 gala opening of Les Miserables in London. Because its neckline plunged at the back and the front of the dress, Oldfield placed a band at the nape of the neck, which Diana disguised with a black velvet rose.
Guide price: £30,000 to £50,000