Work began in 1937 and Hermann Göring visited in the spring of 1938. By 1939 several installations were complete but as the war progressed advantageously for the Germans in 1940 the site remained unfinished.
In 1937 work began, and Hermann Göring toured it in spring of 1938. By 1939 some facilities were ready but as the war progressed to Germany's advantage in 1940 the site remained unfinished.