Røros (Southern Sami: Plassje) is a municipality in Trøndelag county. It is part of the Gauldalen region. The administrative center of the municipality is the town of Røros. Some of the villages in Røros include Brekken, Glåmos, Feragen, Galåa, and Hitterdalen. The mining town of Røros (the administrative center of the municipality) is sometimes called Bergstaden which means "the rock town" due to its historical notoriety for copper mining. It is one of two towns in Norway that were historically designated "mining towns," along with the "silver-town" of Kongsberg. The modern-day inhabitants of Røros still work and live in the characteristic 17th and 18th-century buildings which have led to its designation as a UNESCO World Heritage Site in 1980. Røros has about 80 wooden houses, most of them standing around courtyards. Many retain their dark pitch-log facades, giving the town a medieval appearance. The 1,956-square-kilometre (755 sq mi) municipality is the 32nd largest by area out of the 422 districts in Norway. Røros is the 187th most populous municipality in Norway with a population of 5,623. The municipality's population density is 3.2 inhabitants per square kilometer (8.3/sq mi) and its population has decreased by 0.8% over the last decade.