The Hotel de Caumont in Aix-en-Provence Art Gallery is a hôtel particulier in the Quartier Mazarin in Aix-en-Provence.

It was completed in 1742 as a home for François Rolland de Réauville de Tertulle, the Marquess of Cabannes. The entrance has a beautiful indoor fountain and two sets of stairs: one for the family, and another one for the servants. Hotel de Caumont changed many hands until it was sold to the city of Aix in 1964. For a while it was used by the postal service until it became a music school Conservatoire Darius Milhaud in 2013. Only a year later the music school moved to a new building and Hotel de Caumont opened as a private museum of art and art gallery with a permanent exhibition on Cesanne. It is also used for diverse temporary exhibits and cultural events.

The lovely garden is also used as exhibiting space for large-scale sculptures. There is also a small theatre.

Address: 3 Rue Joseph Cabassol, 13100 Aix-en-Provence, France, Phone: +33-4-42-20-70-01