What to know

• The princess wore the black silk evening dress at an event in June 1994, the same evening Prince Charles admitted to having an affair during an interview broadcast on national television..S1
• Princess Diana hit the headlines when she was photographed wearing a black silk gown in 1994, and it was quickly dubbed the "revenge dress".S2
• The “revenge dress” worn by the late Princess Diana in 1994 is up for auction at Sotheby’s for the first time in nearly three decades. The black silk evening dress by Greek designer Christina Stambolian is estimated to fetch as much as £220,000 (US$298,110) wh...S3