Princess Diana's style has endured decades after her death . Not only does the former Princess of Wales's fashion continue to inspire people around the globe, her outfits have become the focus of preservation initiatives . But prior to marrying King Charles , Princess Diana allegedly narrowly avoided committing a major " fashion faux pas " during a stay on the Balmoral estate . In the book A Royal Duty , former palace butler , Paul Burrell , discussed Princess Diana's first time staying at Balmoral, which was also the second occasion she'd ever visited the regal estate. According to Burrell, the housemaid assigned to help Diana during the trip emerged holding "a simple long black evening dress." "This is my lady's dress," the housemaid reportedly shared. "She's only got the one and she's here for three nights.…