These are so much fun to create. I made a bunch of dumb ones from other sketches, but they were too small.  Then, in February I needed something for the DoodleADay prompt, Paris.  I knew everyone would probably choose the Eiffel Tower, so I sketched out and shaded a small portion of Notre Dame with the help of a public domain image.  It seemed rather plain, so I made it into a cut out, which turned out OK.