In the long history of garments that have carried meaning beyond their fabric, few have done so as precisely as the black silk dress Princess Diana wore to a London gallery in December 1994 — hours after her husband confessed his infidelity to the nation. Now, more than thirty years later, Sotheby's will offer that dress at auction with an estimate of up to $300,000, inviting the world once more to reckon with what it means when a person chooses, in a moment of public pain, to speak through what they wear. The dress endures not merely as fashion history, but as a testament to the quiet power o