Maxime-Pierre Jules Dethomas was a French painter, draughtsman, printmaker, illustrator, and was among the best known theater-set and costume designers of his era. As an artist, Dethomas was highly regarded by his contemporaries and exhibited widely, both within France and abroad. He was a regular contributor to the Impressionistes et Symbolistes, and a founding committee member of the Salon d'Automne. In 1912, he was awarded the Chevalier de la Légion d'honneur for his contributions to French art.

During the latter part of his career, he is remembered for his work overseeing set and costume design for the Théâtre des Arts and the Paris Opera. His works appear in many important national collections, including the Musée d'Orsay, the Hermitage Museum and the National Gallery of Art. A large collection of his theatrically related work is held at the Bibliothèque-Musée de l'Opéra National de Paris. Dethomas is also remembered for his close friendship with the artist Henri Toulouse-Lautrec, his brother in-law Ignacio Zuloaga and his association with Les Nabis and other important Post-Impressionist and Symbolist artists and writers. Dethomas died in 1929 at the age of 61, and was buried at the Passy Cemetery, Paris.