Winnaretta Singer (8 January 1865 – 26 November 1943) was an American-born heiress to the Singer sewing machine fortune. She used this to fund a wide range of causes, notably a musical salon where her protégés included Debussy and Ravel, and numerous public health projects in Paris, where she lived most of her life. Singer entered into two marriages that were unconsummated, and openly enjoyed many high-profile relationships with women. She was styled as Princess Louis de Scey-Montbéliard during her first marriage and as Princess Edmond de Polignac following her second marriage in 1893.

Winnaretta Singer was born in Yonkers, New York, the twentieth of the 24 children of Isaac Singer. Her mother was his Parisian-born second wife, Isabella Eugénie Boyer. After the American Civil War, the Singer family moved to Paris, where they remained until the Franco-Prussian War in 1870. The family then settled in England, first in London, and then Paignton, Devon where they moved to Oldway Mansion, a 115-room palace built by her father. After Isaac Singer's death in 1875, Isabella and her children moved back to Paris. In 1879 Isabella remarried; her new husband was a Belgian violinist, Victor-Nicolas Reubsaet. Presumably, he abused Winnaretta; rumors flew about the violence in their house. As soon as she came of age, Winnaretta seized control of her $1 million inheritance and left to live on her own.^[1]

Although known within private social circles to be a lesbian, Winnaretta married at the age of 22 to Prince Louis de Scey-Montbéliard (fr). The marriage was annulled in 1892 by the Catholic church, five years after a wedding night that reportedly included the bride's climbing atop an armoire and threatening to kill the groom if he came near her.^[1][3]

In 1893,^[4][5][6] at the age of 28, she stepped companionably into an equally chaste marriage with the 59-year-old Prince Edmond de Polignac (1834–1901), a gay amateur composer. Although it was a mariage blanc (unconsummated marriage), or indeed a lavender marriage (a union between a gay man and a lesbian), it was based on profound platonic love, mutual respect, understanding, and artistic friendship, expressed especially through their love of music.^[7] The same year, Singer exhibited her work at the Palace of Fine Arts at the World's Columbian Exposition in Chicago, Illinois.^[8]

In 1894, the Prince and Princesse de Polignac established a salon in Paris in the music room of their mansion on Avenue Henri-Martin. Their niece by marriage, Jeanne de Montagnac, often assisted in hosting the salons. The Polignac salon came to be known as a haven for avant-garde music. First performances of Chabrier, d'Indy, Debussy, Fauré, and Ravel took place in the Polignac salon. The young Ravel dedicated his piano work, Pavane pour une infante défunte, to the Princesse de Polignac. Many of Marcel Proust's evocations of salon culture were born during his attendance at concerts in the Polignac drawing room.^{[citation needed]}

After her husband's death, Winnaretta Singer-Polignac used her fortune to benefit the arts, sciences, and letters.^[12] She decided to honor his memory by commissioning several works of the young composers of her time, amongst others Igor Stravinsky's Renard, Erik Satie's Socrate^[13] (by her intercession Satie was kept out of jail when he was composing this work), Darius Milhaud's Les Malheurs d'Orphée, Francis Poulenc's Concerto for Two Pianos and Organ Concerto, Jean Françaix's Le Diable boîteux and Sérénade pour douze instruments, Kurt Weill's Second Symphony, and Germaine Tailleferre's First Piano Concerto. Manuel de Falla's El retablo de maese Pedro was premiered there, with the harpsichord part performed by Wanda Landowska.^[14]

In addition to Proust and Antonio de La Gándara, the Princesse de Polignac's salon was frequented by Isadora Duncan, Jean Cocteau, Marguerite de Saint-Marceaux, Claude Monet, Sergei Diaghilev, and Colette. She helped Diaghilev with his Ballets Russes on multiple occasions and financially supported the company.^[15] She was also patron to many others,^[16] including Nadia Boulanger, Clara Haskil, Dinu Lipatti, Arthur Rubinstein, Vladimir Horowitz, Armande de Polignac, Loie Fuller,^[17][18] Ethel Smyth, Le Corbusier, Adela Maddison, the Ballets Russes, l'Opéra de Paris, and the Orchestre Symphonique de Paris. In addition to performing as pianist and organist in her own salon,^[19] she was an accomplished painter^[20] who exhibited in the Académie des Beaux-Arts and in the 1906 International Society of Sculptors, Painters and Gravers.^[21] One canvas eventually appeared in the showcase of an art gallery, advertised as being a Manet.^{[citation needed]}

Winnaretta Singer-Polignac was also an important leader in the development of public housing in Paris. Her 1911 building of a housing project for the working poor at Rue de la Colonie, in the 13th arrondissement, was considered to be a model for future projects.^[22] In the 1920s and 1930s, Singer commissioned the architect Le Corbusier to rebuild or construct several public shelters for Paris's Salvation Army. The plans of Le Corbusier's Salvation Army hostel in Paris show a private apartment at the top floor for "Miss Singer". With her friend Madeleine Zillhardt, she bought the barge 'Louise-Catherine' named in memory of Zillhardt's companion Louise Catherine Breslau. The boat was rehabilitated by Le Corbusier in 1929 in order to be a refuge of the Salvation Army for the homeless in winter and a summer camp for children, moored in Paris on the banks of the Seine, at the Pont des Arts and at the Pont d'Austerlitz.^[23]

During World War I, working with Marie Curie, Singer-Polignac helped convert private limousines into mobile radiology units to help wounded soldiers at the front.^{[citation needed]}

During the inter-war period, Singer-Polignac worked with Consuelo Vanderbilt Balsan and assisted in the construction of a 360-bed hospital destined to provide medical care to middle-class workers. The result of this effort is the Foch Hospital, located in Suresnes, a suburb of Paris, France. The hospital also includes a school of nursing and is one of the top-ranked hospitals in France, especially for renal transplants. It has remained true to its origins and stayed a private not-for-profit institution that still serves the Paris community. It is managed by the Fondation médicale Franco-américaine du Mont-Valérien, commonly called Fondation Foch.^[24]

After Singer-Polignac's death, her legacy of enlightened generosity was carried on through the work of the Fondation Singer-Polignac. Created in 1928, the goals of the foundation are the promotion, through gifts and bourses, of science, literature, the arts, culture, and French philanthropy. The Foundation continued to present concerts and recitals in the Polignac mansion's music room.^[25] The performances were first organized by Nadia Boulanger, who presented programs that juxtaposed early music and modern compositions. After Boulanger's death in 1979, the composer Jean Françaix took over the organization of the concert series.^{[citation needed]}