Olieveren, oils, gouaches - Invitation to the opening of March 1, 1958. Beautiful invitation, 4 pages, gallery Les Contemporains 18 rue de l'Hôpital, Brussels. Very good state. 9.5 x 42 cm unfolded. FREE SHIPPING Provenance: Atelier Guillaume Corneille, founding member of the Cobra group with Karel Appel, Asger Jorn, Christian Dotremont, Constant, Jacques Doucet, and later Alechinsky Technique: linocut or line print process on glossy paper, to be determined. Léopold Leysen, known as Pol Mara, born in Antwerp on December 8, 1920 and died in this city on February 10, 1998, is a Belgian painter and draftsman.