César Mange de Hauke

Son of a Franco-Swiss engineer, Francis Mange (1856-1931), director of works for the Panama Canal in the 1890s, and of a mother of Polish origin born in Florence, Countess Marie von Hauke (1864-1942 ), César Mange de Hauke was sent very young to an English school, St. Ronan's School, in Hawkhurst, Kent, from 1911 to 1913.

[3] The gallery De Hauke & Co. became known to the American public, through its exhibitions, Pierre Bonnard (1928), Jacques Mauny (1930), Modigliani (1929), Odilon Redon (1928), Ker-Xavier Roussel, Edouard Vuillard, the movement cubist (1930).

The works were sometimes acquired in association with other dealers, such as Roland Balaÿ, Étienne Bignou, Paul Brame, Valentine Dudensing, Knoedler, Pierre Matisse, Alex Reid & Lefèvre, etc.

According to Harvard Magazine, Hubertus Czernin, writing in the Viennese newspaper Der Standard of February 28, described him as a "collaborator of art plunderers.

[13] According to art historian Jonathan Petropoulos, de Hauke was friends with the Monuments Man officer Tom Howe and maintained a warm correspondence with him after World War II.