12 Unforgettable Outfits Princess Diana Wore to Trooping the Colour

Trooping the Colour, the traditional military parade held on the streets of London on a Saturday in early June (this year it will be the 13th), is technically a celebration of the monarch’s birthday. However, it also gives the public the chance to observe royal style, and to look back at the royal family’s fashion choices through the years. The late Princess Diana is considered one of the most important fashion icons of the last century, and her historic appearances at the annual…