Adolf Wölfli (1864-1930) Johann Lang von Sumiswald, 1917 Coloured pencil and crayon on paper Work on both sides 62.5×49cm Provenance : - Galerie Jürg Stuker, Bern - Galerie Ritsch-Fisch, Strasbourg - Acquired from the latter by the current owner Exhibitions : - Paris, Fondation Antoine de Galbert, la maison rouge, "Le mur, collection Antoine de Galbert" 14 June- 21 September 2014, reproduced in the exhibition catalogue - Arras, Musée des Beaux-Arts d'Arras, "PierreYves Bohm, un artiste sous influences", 2016 - Arles, Festival du dessin, "Sélection de dessins de la collection Antoine de Galbert", 12 April - 11 main2025, reproduced in the exhibition catalogue. This work is referenced in the Archives of the Adolf Wölfli Foundation under n°PB 1917-15.