It’s rare for a general purpose map to give attention to what is under the ground as well as to what is on the surface. This map shows the county of Akershus in Norway, centred around Christiania (now Oslo), in the eighteenth century. The map was drawn by Johann Baptist Homann, a largely self taught cartographer and engraver, in 1729. The area is described by a Latinized version of its name, Aggerhusiensis. About a quarter of the map is taken up by an illustration of a mine, with the surface cut away to show the internal workings.

The map appears here in a general atlas, titled Atlas geographicus maior, published in Nuremberg by the heirs of Homann in 1798. The company was founded by Homann in 1702; he built a successful map publishing business, both creating his own maps and publishing those of others. He was succeeded by his son Johann Christoph Homann, who died young, and the company passed to friends, and connections by marriage, who continued the company as Homännische Erben (Homann Heirs). It lasted into the mid-nineteenth century and issued over 900 maps, a remarkably long run. The atlas, as its title suggests, is very large, containing 152 maps, and covering most of the world apart from Germany. A second volume of 124 maps concentrates on Germany alone. There is extensive geographical text in German, but the maps are mainly in Latin.

Activities in and around the mine are shown in some detail, providing an interesting view of early mining processes. There are ladders to move between levels and a pulley system, and a furnace in the background, perhaps for the iron working associated with the area. Near the top, a stream has been diverted to turn a water wheel.
There is nothing specifically Christmassy about this map, but somehow it felt appropriate to this time of year. Perhaps it’s the combination of the clearing of paths through the snow, the little fir trees, the pale blue wash colour (a shade normally used for water, and an unusual choice for land) and the many figures working away underground like Santa’s elves.
[Edited 16/12/25 to remove reference to coal mining, as it is not clear that this is what is being mined.]
Tractus Norwegiae Danicus. Magnam diecoseos Aggerhusiensis / partem sistems editus a Johanni Baptistae Homanni … Noribergae Anno 1729. In Atlas geographicus maior. Norimbergae: Homannianis heredibus, [1798]. Map Res. 40












































