Anne-Marie Gaillard, known as Nina de Villard de Callias, Nina de Callias or Nina de Villard, was a French composer, pianist, writer, and salon hostess.
The daughter of a rich Lyon lawyer, after her marriage to Hector de Callias she hosted one of the most prominent literary and artistic salons of Paris. She was married to de Callias from 1864 to 1868, and had a decade-long love affair with Charles Cros, whom she inspired to paint Coffret de santal. She is also the Dame aux éventails by Édouard Manet.
Guests who attended her salons included Hector Berlioz, Edgar Degas, Anatole France, Augusta Holmes, Stéphane Mallarme, Manet, Arthur Rimbaud, and Richard Wagner, among others. By 1869 she was hosting young poets in search of new forms of expression, known collectively as the Parnassians.
She composed works for piano and voice, and contributed two poems to Le Parnasse contemporain: La Jalousie du jeune Dieu and Tristan & Iseult. The Franco-Prussian War forced her to flee with her mother to Geneva, where she adopted her mother's maiden name, and stayed three years before returning in 1873 to re-assume the dissolved artistic circles there.