Samuel Siegfried Bing (26 February 1838 – 6 September 1905), who usually gave his name as S. Bing (not to confuse with Samuel Otto Bing, 1850–1905, was his brother) was a German-French art dealer who lived in Paris as an adult, and who helped introduce Japanese art and artworks to the West and was a factor in the development of the Art Nouveau style during the late nineteenth century.
Bing was born in Hamburg, a member of a large family with diverse commercial interests. He relocated to France in 1854, to help manage the ceramics manufacturing business of Bing family in-laws, and resided in France for the remainder of his life. He became a naturalized French citizen in 1876. Bing married a second cousin, Johanna Baer, in July 1868. Their son Marcel Bing eventually became a business associate of his father's, as well as a jewelry designer of Art Nouveau style.
In 1873, on the death of his elder brother Michael, Siegfried Bing became the head of Bing family enterprises in France. Bing developed a flourishing import-export business from the 1870s onward, working through several commercial entities with various partners and family members; he concentrated on the importation and sale of Japanese and other Asian objets d'art, though his business also exported French goods to Japan, working through a Yokohama office managed by his younger brother August. In December 1895 he opened his famous gallery, the Maison de l'Art Nouveau, which showed works of artists of what would become known as the Art Nouveau style. Henry van de Velde designed the interior of the gallery, while Louis Comfort Tiffany supplied stained glass. Bing's gallery featured entire rooms designed in the Art Nouveau style by his in-house designers.
During the gallery's most successful period, 1896–1902, Bing vended a great variety of artistic work, included fabrics designed by William Morris, glassware by Louis Comfort Tiffany, jewelry, paintings, ceramics, stained glass, and furniture of Art Nouveau style. Bing dealt with customers ranging from private collectors to major museums, and helped to promote a global art market. His pavilion at the 1900 Paris World's Fair was especially notable. By this time Bing was the primary European dealer for the Rookwood Pottery Co. of Cincinnati and the Grueby Faience Company of Boston, as well as the wares of Tiffany.