Nicole Phelps / Vogue: The Met Gala 2026 Theme "Costume Art", Explained - Fashion is coming out of the basement at the Metropolitan Museum of Art. Announced today, "Costume Art," the spring 2026 exhibition at the Costume Institute, will mark the inauguration of the nearly 12,000-square-foot Condé M. Nast Galleries, adjacent to The Met's Great Hall.