caption: The image shows a mannequin wearing a grey dress with a white collar and cuffs, which is believed to be the costume worn by Princess Diana during her coronation. The dress is made of a light, airy fabric and has a fitted bodice with a full skirt that falls to the floor. The neckline is adorned with a delicate lace trim and the sleeves are long and full. The bodice is decorated with intricate beading and sequins, and the skirt is full and voluminous.