Topographic Map (Messtischblatt) showing Langen (Hessen), Messel and the location of the jagdschloss of Dianaburg north of the city of Darmstadt, Hesse, Germany, within the Arheilgen district of Darmstadt. Sheet "3441" using prussian numbering scheme, sheet "6018" using the grid-oriented numbering scheme used afer 1937.