World Map on Mercator's Projection 1855 Berghaus detailed mapPlaniglobn in Mercators Projection. (Old Maps, 19th Century Maps, World Maps, Mercator Map). Issued 1855 Gotha by Justus Perthes for Stieler. Map by Berghaus. Nicely detailed oversize mid 19th century engraved map with original hand color. This example has no centerfold, unlike most Stieler maps. Stieler maps went through continual revisions. Thus, for any specific Stieler map such as this one, there are typically numerous variant issues with varying