Caspar David Friedrich – Two Men Contemplating the Moon – The Metropolitan Museum of Art https://www.metmuseum.org/art/collection/search/438417
Dr. Otto Friedrich Rosenberg, Dresden (by 1840–d. 1850; acquired from the artist in exchange for medical attention); his daughter, Theophila Minna Rosenberg, Dresden (by 1850–presumably until d. 1882); by descent through the Rosenberg family, Wuppertal-Barmen, later Hamburg, to Gottfried Spiegler, Glinde (until 1999; sale, Christie’s, London, October 7, 1999, no
(color), as "Zwei Manner in Betrachtung des Mondes" in a private collection at Wuppertal-Barmen
