Emilianusstollen - Roman Copper Mine
Ancient Roman copper mine gallery with original inscriptions, carved in stone, dating back to the 3rd century. Historical system of galleries, cut almost horizontally into the steep rock slope. Some parts of the mine are secured with modern support technology. Ore mining in the middle ages, primarily extraction of Azurite, a copper carbonate mineral (used as a blue pigment and a major source of the blue colour employed by medieval painters). This special hue of azure, a favourite of Albrecht Dürer's, for example, is also called "Wallerfanger Blue" after the municipality of Wallerfangen.