The Léon-Dierx Museum is an art museum on Reunion Island, a French overseas department in the southwestern Indian Ocean. It is located in the rue de Paris in Saint-Denis, the main town. As early as the middle of the 19th century, the intellectual and political elite of Reunion Island called for the creation of a museum dedicated to the "Fine Arts", according to the formula of the time. It was not until the beginning of the 20th century that the museum came into being, thanks to the efforts of two Creole childhood friends, Georges Athénas and Aimé Merlo, known in literature under the pseudonym Marius-Ary Leblond.
It contains seascapes by Numa Desjardins, prints by Alfred Richard, a bronze by Pablo Picasso, works from the collection of Lucien Vollard, Ambroise Vollard's brother, including those of Gustave Caillebotte, Paul Cézanne, Paul Gauguin, Auguste Renoir, Odilon Redon, Georges Rouault, etc, Louis Valtat's Mer et rochers rouges, Maurice de Vlaminck's Fleurs as well as 19th century photographs (photographs of François Cudenet and his paintings) and paintings by local artists (including Arthur Grimaud, Adolphe Le Roy, Antoine Louis Roussin) and the Montmartre painter Georges Michel.