After the Prussian government had banned traditional straw roofing in the 19th century because of the high risk of fire, roofing slate gained economic importance on the Strimmiger-Berg. The municipalities …
Only in the years 1921 to 1924 was the pit in operation, in which the oily roofing slate was mined. However, the oil content in this pit was too low. …
mining and caves.
On October 19, 1862, the industrialist Beel received permission in St. Aldegund to dig for copper ore here above the little saint's house on the "Kehr". The …
About the small pit are no historical records available. The drawings, like the globe, on the wall and on the ridge helped to name the astronomical cave.