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. There was a close tie between art, music and literature among the
Les XX artists. During the exhibitions, there were literary lectures and discussions, and performances of new classical music, which from 1888 were organised by
Vincent d'Indy, with from 1889 until the end in 1893 very frequent performances by the
Quatuor Ysaÿe. Concerts included recently composed music by
Claude Debussy,
Ernest Chausson and
Gabriel Fauré. Leading exponents of the
Symbolist movement who gave lectures include
Stéphane Mallarmé,
Théodore de Wyzewa and
Paul Verlaine. Together with Maus, the influential jurist
Edmond Picard and the Belgian poet
Emile Verhaeren provided the driving force behind an associated periodical, ''
L'Art Moderne, which was started in 1881. This publication aggressively defended Les XX
from attacks by critics and members of the visiting public. Picard polemically fomented tensions both with the artistic establishment and within Les XX
. By 1887, six of the more conservative original members had left, sometimes under pressure from Picard and Maus, to be replaced by artists who were more sympathetic to the cause. Altogether, Les XX'' had 32 members during the ten years of its existence. ==Members of Les XX==