|Maker unknown, Trompe-l'oeil map, Collection of Shelburne Museum, 27.18-6|
A real red-rimmed paper label on the back of the framing indicates that the work is French and was made in 1779. I'll leave you with some details and photo micrographs to enjoy, but this really needs to be seen to be believed.
|The artist played with depicting the distortion caused by lenses in the lunettes.|
|At 60x magnification you get a better sense of the rendered optical distortion through the lens. The letters get bigger and the color changes.|
|A better look at those fictional plate marks.|
|The depicted plate mark flattens out under 60x magnification. Aren't those rose-head nails lovely?|