Adolph von Menzel, Doctor and Patient, 1899, Graphite, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/334927

Adolph von Menzel, Woman with a Crushed Velvet Hat, 1894, Graphite, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/334929

Adolph von Menzel, Landschaft, 1892, Öl auf Leinwand, Städel Museum, Frankfurt am Main. https://dartabase.art/cite/staedel/2245