Røros Copper Works

In 1644, the general manager of the mine at Kongsberg gave permission to exploit one lode of copper in the mountains near Rauhaammaaren. Storvola and Gamle Storwartz became some of the company's most important mines. Nordgruve, another important mining area, was situated to the north east of the town of Røros.

In 1685, Røros discovered a considerable amount of associated silver mines. The mining activity lasted for about 40 years, and a total of 1,350 tonnes (1,330 long tons; 1,490 short tons) of sterling silver was mined. This provided considerable revenue for the Danish-Norwegian treasury to support King Frederick IV in building the palace of Solbjerg.

From 1740 onwards, there was a period of greatness for the Røros Copper Works with several mines yielding well. Due to the funding of the Oldenburg royal family, the scale of the Leros silver mine and copper mine expanded. As the mine is close to Trondheim and at a lower latitude, the ore output is much higher than Scandinavia Falun. The rich income of the mining area also prompted the royal family to repeatedly ask for an expansion of the mining. Dynamite was utilised from 1870 and later drilling machines. The electrical generating station built high-tension power lines to supply the mines, starting in 1897. The Bessemer process was introduced at the end of the 1800s. The Rørosbanen railway line was completed in 1877. High prices for both copper and zinc gave good results, but then the prices dropped and there were several years with large losses. After 333 years, mining activity in Røros Municipality ceased in 1977.