Interior of the Palm House, Carl Blechen
On Google Art Project. Downloadable high-resolution version on Wikimedia Commons. Original is in the Alte Nationalgalerie, Staatliche Museen zu Berlin.
I had seen reproductions of this painting before, and has assumed it was a watercolor from the translucency of the leaves and the graphic nature of some of the architectural elements, but it’s oil on paper, laid on canvas.
This is one of several paintings by Blechen of the interior of the Palm House (Pfaueninsel) in Berlin. You can see two others here and here.
