Bergslagen is a historical, cultural, and linguistic region located north of Lake Mälaren in northern Svealand, Sweden, traditionally known as a mining district. In Bergslagen, the mining and metallurgic industries have been important since the Middle Ages although Malmfälten ("the Ore Fields"), the mining district of northernmost Sweden centered at the towns of Kiruna and Malmberget, has been of greater importance during the 20th century.