Friedrich Schröder Sonnenstern (1892-1982) Theorisynus oder, 1958 Coloured pencil on paper Signed and dated lower right Titled lower left 72×50cm Provenance : - Former Christine Mermod collection, Lausanne - Acquired from her by the current owner Exhibitions : - Grenoble, Musée de Grenoble, "Souvenirs de voyage. La collection d'Antoine de Galbert", 27 April - 28 July 2019, reproduced in the exhibition catalogue - Oiron, Château d'Oiron, "Grand Bazar - Choix de Jean-Hubert Martin dans la collection Antoine de Galbert", 27 June - 3 November 2021, reproduced in the exhibition catalogue - Arles, Festival du dessin, "Sélection de dessins de la collection Antoine de Galbert", 12 April - 11 May 2025, reproduced in the exhibition catalogue