The Museum of the Legion of Honour and the Orders of Chivalry is a French national museum dedicated to the history and insignia of French and foreign orders of chivalry, merit, and decoration. It is located within the Hôtel de Salm, also known as the Palais de la Légion d'Honneur, on the left bank of the Seine in Paris, facing the Musée d'Orsay.

The museum's collection is intrinsically linked to the history of the Legion of Honour, the premier French order of merit, established by Napoleon Bonaparte in 1802. The institution aims to preserve and present the heritage of this order, along with that of other French and international distinctions. Its holdings constitute one of the world's most comprehensive collections of phaleristics, the study of orders and medals.

The core of the museum's exhibits includes a vast array of decorations, ranging from the stars and crosses of the Legion of Honour to rare and historic orders from across the globe. The collection is organized to illustrate the evolution of these honours, their statutes, and their role in society. Notable pieces include the original designs for the Legion of Honour insignia and personal decorations belonging to prominent historical figures.

The museum is housed in a significant historical building. The Hôtel de Salm was constructed between 1782 and 1787 for the Prince of Salm-Kyrburg. After being acquired by the state, it became the seat of the Grand Chancellery of the Legion of Honour. The building was severely damaged by a fire during the Paris Commune in 1871 but was meticulously reconstructed to its original neoclassical design, preserving its architectural integrity.

Beyond its permanent collection, the museum serves an educational and research function. It maintains a specialized library and archives concerning the history of decorations and chivalric orders. The institution also organizes temporary exhibitions that explore specific themes related to honour, merit, and the artistic craftsmanship of insignia.

As a cultural institution under the authority of the Grand Chancellor of the Legion of Honour, the museum offers free admission to the public. It provides a unique insight into the systems of honour and recognition that have shaped French national history and its international relations, making it a distinct destination for those interested in history, heraldry, and political symbolism.