Princess Diana, who died suspiciously at 36 in a car accident with her lover Dodi El Fayed in Paris in 1997, has never been forgotten despite all these years. A bidding war over a purple velvet gown that belonged to Princess Diana pushed the dress to sell for more than $600,000 on Friday, reaching five times higher than its pre-auction estimate to become the most valuable of the late royal’s gowns ever sold at auction.

The auction house said four bidders competed for the gown for nearly five minutes at Sotheby’s in New York, which helped drive up the final $604,800, which includes fees.

It’s the most valuable of Princess Diana’s dresses ever sold at auction, Sotheby’s said, and far surpassed the 347 bin dollars fetched in a 2019 direct sale by the black, off-the-shoulder gown Diana wore when she famously danced with John Travolta at the White House in 1985.

The deep-purple velvet gown sold Friday was designed by British dressmaker Victor Edelstein—one of Diana’s longtime fashion collaborators—for his Autumn 1989 collection. However, Sotheby noted that the original dress design sketch features a drawing of a tiara on the page’s margins, indicating he had Diana in mind when creating the gown.

The dress was first sold in 1997 for $24,150 as part of a charity auction in which Diana sold off 79 gowns to raise more than $3 million for cancer and AIDS charities.

Diana wore the dress as part of an iconic 1997 Vanity shoots with fashion photographer Mario Testino just months before her death, in a 1991 royal portrait shot by Lord Snowdon, Princess Margaret’s then-husband.