JOHANN LUDWIG BLEULER (Feuerthalen 1792–1850 Schloss Laufen) Le Château de Gottlieben. Circa 1850. Gouache. The framing line in pen and black ink, the margins in blue-grey gouache. Titled in pen and grey ink on the lower margin and signed lower right: chez Louis Bleuler au château de Langen en Suisse. 33 x 49.5 cm. Gilt frame. Provenance: - Galerie Kempf, Zurich. - Private collection, Switzerland.