Stuttgart, Germany. They can be seen in many major cities in Europe. Stranded artists trying to raise money to get out by painting reproductions of classics on sidewalks with colored chalk. Their virtuousity and skill is evident in how accurately they recreate originals, often much larger images.
This one is Jacques Louis David’s Napoleon Crossing The Alps. A show-stopper. Impermanent
to avoid displeasing civic authorities, they provide pedestrians a welcome diversion, sometimes repaid with coins.