Bernheim Jeune

Bernheim-Jeune was a famous gallery in Paris, run by a family of art dealers from Besançon, a town in eastern France on the border with Switzerland, who have been selling painting materials and frames since the end of the 18th century  

Arthur Tooth & Sons

Arthur Tooth & Sons was a prominent art gallery located at 5-6 Haymarket, City Of Westminster, Greater London Authority, SW1 in London, near the establishment of another picture dealer, McLean. 

Durand Ruel

Paul Durand-Ruel (born October 31, 1831, Paris, France—died February 5, 1922, Paris), French art dealer who was an early champion of the Barbizon school artists and the Impressionists.