[1][2][3] Dealer of Chaïm Soutine and Amedeo Modigliani, he was one of the first to organize African art exhibitions.
[2] He also bought and sold many works from cutting-edge artists of the time, such as Henri Matisse, Constantin Brâncuși, Pablo Picasso, and Giorgio de Chirico.
Being from modest origins, Paul Guillaume worked first in a garage in Montmartre and then in his gallery in Paris.
This aroused the attention of Guillaume Apollinaire (whom he met in 1911), who in turn introduced him to many of the artists of the beginning of the century in France.
Apollinaire, who died the previous year, had also collaborated with Paul Guillaume on the pioneering study Sculptures Nègres in 1917.