Princess Anne, Queen Elizabeth's only daughter, wore her Royal Navy ceremonial outfit for her mother's state funeral on Monday, the only female member of the royal family to take part in the historic processions. "There was something very powerful about seeing a royal woman wearing uniform so proudly during the mourning period," royal style author Bethan Holt tells PEOPLE. More on how Princess Anne's style honors the Queen's legacy of "being a woman in a man's world" at the link in our bio. 📷: MARTIN MEISSNER - POOL/GETTY