What is the biggest mine in Norway?
Kongsberg Silver Mines
Silver was first discovered between the 1 July and 5 July 1623. The story says that two small children - Helga and Jacob -  were out shepherding their cattle at the top of Gruveåsen hill. They had an ox with them which scraped on the side of the mountain. They could see something shining and glimmering, and they picked it up and took it home to their father. Recognizing it as silver and quite valuable, he melted it and brought it to the town of Skien in Telemark county to sell it. In Skien he was arrested, the police finding it suspicious that someone would attempt to sell silver at such a low price.