The National Costume Museum, located in the Palais de Chaillot in Paris, is a key institution for preserving historical clothing. Its collection, organized by era and designer, includes garments, textiles, and documents that allow fashion to be studied as a social practice. The evidence specifically mentions an exhibition on 19th-century French elegance that was moved to this museum, highlighting its role in research and education. By preserving original pieces, the museum provides primary sources that go beyond advertising, showing the actual use and cultural context of garments over the centuries.