Belgian author, art critic, and attorney who was a founder of L'Art Moderne, a weekly, nineteenth-century publication.
He was born in Brussels, Belgium. He became secretary of Les XX, a group of prominent Belgian artists, in 1884.
He founded a Brussels artistic society called La Libre Esthetique in 1894.
He and his wife Madeleine were close friends and neighbors of the Belgian-British composer Poldowski (Regine Wieniawski).
His artistic organization, Les XX, sponsored an annual showcase of the work of international artists. French Impressionist painter Claude Monet took part in the group's 1886 and 1889 exhibitions.