35 maps show the structure of Germany (and some neighbouring areas) at the end of the Holy Roman Empire of the Geman Nation and gives direct access to the relevant articles in the online encyclopedia Wikipedia.
Very small territories are not include. Of course the user has to have an online internet connection to use the link function to Wikipedia. Offline the atlas can be used as well, i.e. naturally without the connection to Wikipedia.

The purpose is not to document any territorial claims.
Many customs, traditions and even architecture or landscape have their roots in history.
A simple example: why is carneval celebrated in one village but not in the next one only 5 miles away? One was probably part of a catholic territory and the other part of a protestant territory.

Deutschland 1789 - Interaktiv - includes the following maps:

• The Holy Roman Empire of the German Nation
  interactive map to choose the area to be enlarged
• Bavaria
• Swabia (Bavarian part)
• Baden-Würtemberg Southern Part
• Baden-Würtemberg Northern Part
• Palatinate
• Saarland
• Rhineland-Palatinate
• Hesse Southern part
• Hesse Northern part
• Saxony - Thuringia ? Anhalt
• Brandenburg
• Silesia (1763)
• Pomerania
• Mecklenburg
• Schleswig-Holstein (1730)
• Lower-Saxony
• South-Western part of Lower Saxony (Bentheim, Lingen and Osnabrück)
• Niederstift Münster
• Northrhine-Westphalia
  interactive map to choose the area to be enlarged
• Bishporic of Cologne
• Lower Rhineland
• Bishopric of Münster ? Southern part
• Minden-Ravensberg and Lippe
• Bishopric of Paderborn and Principality of Waldeck
• Duchy of Westfalen
• Ruhr area
• Siegerland
• Limburg and Liege
• Luxembourg
• Tyrol (1766)
• East-Prussia and West-Prussia
• Baltic countries 16. century
• Baltic countries end of the 17. century
• Baltic countries end of the 18. century
• Legend and abbreviations