In a comment yesterday, "Diogenes" asked me if a photo I had posted included a partial view of a map of Paris. It did. Well, not a map, actually, but some kind of aerial or satellite photo. Here's a better view of it.
I took this photo in a fairly dark room using a flash. I had to take it from a side angle, and not straight in front of the map, because the flash reflected in the map when I tried to take it straight on. I "corrected" the image in Photoshop to make both the photos you see here.
This second attempt at editing the photo I took is truer to its actual color. It's too bad the image has turned so blue over the years. Walt bought the poster in Paris, probably back in the 1990s, and carried it home to San Francisco. He had it mounted on a board. Then we moved it back to France in 2003. It's almost as wide as a double bed, by the way. I just went and measured it: it's 132 x 80 centimeters — 52 x 31½ inches.