“Staldsen Switzerland”: an episode from the history of nature conservation in East Prussia in the first third of the 20th century
... which received the unofficial name “Staldzen Switzerland.” The content of the letters, the issues they raise, and the circumstances of their writing are of particular interest given the limited study of the process of formation and development of nature conservation activities in East Prussia in the first third of the twentieth century. Additional interest for historians of regional culture may be represented by the fact that Detlefsen, who is known primarily for his activities in the preservation of ...
