mixed media (gouache, watercolor, pencil) on paper Dimension: 28,5 x 28,5 cm  signed lower left: Kupka   Provenance: significant private collection   Confirmation of the authenticity by Vladimir Lekes, author of the Catalogue Raisonné of Oil Paintings by Frantisek Kupka (published in collaboration with Adolf Loos Apartment and Gallery, National Gallery in Prague, Austrian National Gallery Belvedere and the copyright holder of the painter by the French state company Adagp Paris) registered in the Guide International des experts et spécialistes, published in France, attached.

Confirmation of the authenticity of Pierre Brulle and Professor Tomas Vlcek attached.

Futhermore consulted with Professor Jaromir Zemina, Dr Karel Srp, Dr Jiri Machalicky, Aneta Kopecka and Vladimir Lekes.