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R.M.Lenox: 1900
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R.M.Lenox: 1901, Pablo Picasso, Cafe in Montmartre -- Ludwig Museum (Cologne)
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R.M.Lenox: 1905, Kathe Kollwitz, Woman's Head, lowered -- Ludwig Museum (Cologne)
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R.M.Lenox: 1906, Paula Modersohn-Becker, Self-Portrait in Front of Blue Background -- Ludwig Museum (Cologne)
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R.M.Lenox: 1907, Alexej von Jawlensky, Olive Grove -- Ludwig Museum (Cologne)
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R.M.Lenox: 1909 (ca.), Henri Matisse, Seated Girl -- Ludwig Museum (Cologne)
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R.M.Lenox: 1910, Erich Heckel, Pheasant Manor near Moritzburg -- Ludwig Museum (Cologne)
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R.M.Lenox: 1910, Ernst Ludwig Kirchner, Franzi and Bathing People -- Ludwig Museum (Cologne)
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R.M.Lenox: 1910, Kathe Kollwitz, Worker Woman with Earring -- Ludwig Museum (Cologne)
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R.M.Lenox: 1910, Marc Chagall, Sabbath -- Ludwig Museum (Cologne)
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R.M.Lenox: 1911, Alexej von Jawlensky, Head of a Woman with Flowers in Her Hair -- Ludwig Museum (Cologne)
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R.M.Lenox: 1911, Kees van Dongen, Portrait of Ana -- Ludwig Museum (Cologne)
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R.M.Lenox: 1912, Erich Heckel, Beach (Bathers) -- Ludwig Museum (Cologne)
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R.M.Lenox: 1912, Erich Heckel, Canal in Berlin -- Ludwig Museum (Cologne)
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R.M.Lenox: 1912, Ernst Ludwig Kirchner, Still Life with Tulips, Exotica and Hands -- Ludwig Museum (Cologne)
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R.M.Lenox: 1912, Ernst Ludwig Kirchner, The Russian Woman -- Ludwig Museum (Cologne)
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R.M.Lenox: 1913, August Macke, Lady in a Green Jacket -- Ludwig Museum (Cologne)
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R.M.Lenox: 1913, Ernst Ludwig Kirchner, Five Women of the Street -- Ludwig Museum (Cologne)
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R.M.Lenox: 1913, Frantisek Kupka, Red and Green -- Ludwig Museum (Cologne)
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R.M.Lenox: 1913, Georges Braque, The Table in the Bar Stout -- Ludwig Museum (Cologne)
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R.M.Lenox: 1913, Nadezhda Udaltsova, Female Nude -- Ludwig Museum (Cologne)
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R.M.Lenox: 1914, August Macke, Farewell -- Ludwig Museum (Cologne)
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R.M.Lenox: 1914, Ernst Ludwig Kirchner, The Railroad Viaduct -- Ludwig Museum (Cologne)
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R.M.Lenox: 1915, Emil Nolde, Family (Bonnichsen) -- Ludwig Museum (Cologne)
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R.M.Lenox: 1916 (ca.), Wassily Kandinsky, Moscow, Zubowski Square III -- Ludwig Museum (Cologne)
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R.M.Lenox: 1916, Emil Nolde, Dreamers -- Ludwig Museum (Cologne)
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R.M.Lenox: 1917, Lyonel Feininger, Bridge III -- Ludwig Museum (Cologne)
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R.M.Lenox: 1918, Fernand Leger, The Pink Tug -- Ludwig Museum (Cologne)
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R.M.Lenox: 1918, Oskar Kokoschka, The Heathens -- Ludwig Museum (Cologne)
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R.M.Lenox: 1921, Oskar Kokoschka, Dresden, Neustadt III -- Ludwig Museum (Cologne)