 However, concrete indications of mining in the Turrach region cannot be found either in this document or in the following centuries.In 1657, Johann Adolf Count Schwarzenberg, who ruled Murau, initiated the search for copper ore.In the Steinbachgraben, huge amounts of limonite (a type of iron ore) were found, whereupon the count asked Emperor Leopold I for a license for mining and smelting, which was issued on January 31, 1660.