Ten of Princess Diana's most iconic dresses will be auctioned by Kerry Taylor Auctions in London, March 19, and are expected to fetch about $309,000. These dresses had originally been donated to charity by the royal at the request of Prince William in 1997, just a few months before her tragic death.

Branding the dresses as "most important and iconic," the auction house told AFP that the princess had worn these dresses to some of the most important events in her life.

According to CBS News, the iconic pieces set to go under the hammer include:
The stunning midnight blue velvet gown by Victor Edelstein that Diana donned during the state dinner hosted by President Ronald Reagan and his wife Nancy at the White House in 1985. This is the same dress in which the royal danced with actor John Travolta.

A silk dress in pink designed by Catherine Walker when the Princess toured India in 1992 and another Walker creation in red velvet that the Princess wore during the premiere of the film "Steel Magnolias" in 1990.

The auction will also feature another Walker dress which is sea-green and sequined that the Princess wore on a state visit to Austria in 1989, a red velvet dress with a bow on the back that she wore to Australia and to the premiere of "Back to the Future" in 1985 and a black halter neck dress she slipped into for a UNESCO charity event in 1994.

A black velvet evening gown by Bruce Oldfield that the Princess of Wales wore for the premiere of "Les Miserables," in 1985.

A Zandra Rhodes dress clinched at the waist with an obi belt and sheer sleeves which Diana wore to a charity gala at the London Palladium in 1987.

A stunning white gown with floral print that the late Princess wore during a state visit to Brazil, in 1991.

A dark green velvet dress that Diana wore to a private dinner party at Kensington.

"Diana was photographed wearing them not only by the paparazzi, but by some of the leading photographers of the day -- including Mario Testino and Lord Snowdon," Kerry Taylor Auctions added.

The princess' belongings are one of the most auctioned pieces and also known to fetch large sums. In January, rare and unseen pictures of the royal went on sale in New Hampshire. The pictures held appeal not only because they featured Diana but also had the words "NOT TO BE PUBLISHED" scribbled across it.