Date estimated. Embossed chromolithograph plan printed in color. Little is known about the Bauerkeller cartographic publishing firm. Headed by Georg Bauerkeller, they were apparently based in Darmstadt, Germany, just south of Frankfurt, but also maintained an office in Paris. They were active for about 30 years from the 1830s through the 1860s, and produced maps, plans, and small atlases. They are best known for the maps they produced using the 'geomontographie' - the process employed in the production of the present map.