Les XX was founded on 28 October 1883 in Brussels and held annual shows there between 1884 and 1893, usually in January–March. The group was founded by 11 artists who were unhappy with the conservative policies of both the official academic Salon and the internal bureaucracy of L'Essor, under a governing committee of twenty members. Unlike L'Essor ('Soaring'), which had also been set up in opposition to the Salon, Les XX had no president or governing committee. Instead Octave Maus (a lawyer who was also an art critic and journalist) acted as the secretary of Les XX, while other duties, including the organization of the annual exhibitions, were dispatched by a rotating committee of three members. A further nine artists were invited to join to bring the group membership of Les XX to twenty. In addition to the exhibits of its Belgian members, foreign artists were also invited to exhibit.
