“ Das Innere des Palmenhauses auf der Pfaueninsel.” 1832. Oil on paper mounted on canvas. Collections of the Alte Nationalgalerie, Berlin. In the public domain because the artist has been dead over 100 years. via https://commons.wikimedia.org/wiki/File:Carl_Blechen_- Das_Innere_des_Palmenhauses-_Google_Art_Project.jpg
“ The Interior of the Palm House on Peacock Island.” 1832-1834. Prussian. Collections of the Hamburger Kunsthalle, Hamburg. Image © Bildarchiv Preußischer Kulturbesitz. Fair use license. via http://germanhistorydocs.ghi-dc.org/sub_image.cfm?image_id=2873
“The Interior of the Palm House on the Pfaueninsel Near Potsdam.” 1834. Prussian. Oil on canvas. Collections of the Art Institute of Chicago. Cc0 License 0. via https://www.artic.edu/artworks/144969/the-interior-of-the-palm-house-on-the-pfaueninsel-near-potsdam
These works are all of the Palm House near Potsdam, Germany that had been designed by noted architect Karl Friedrich Schinkel to house the collection of palm trees that belonged to King Friedrich Wilhelm III of Prussia.