Princess Diana was known for her iconic wardrobe, and members of the public are willing to pay big for them more than two decades after her death. A silk floral-printed dress designed by Bellville Sassoon and worn by Diana on multiple occasions sold Thursday for over $500,000 at an auction in Beverly Hills, California.

The sale, taking place today at the Peninsula Beverly Hills in Los Angeles, is touted as a landmark auction with over 300 units for sale, including several looks worn by Princess Diana that have never hit the market before.

Collector Renae Plant collapsed with joy after winning Princess Diana’s dress for $400,000. It was one of more than 200 items at the "Princess Diana’s Style & A Royal Collection" auction in Beverly Hills.