Kadaň Museum is situated in a building of the former Franciscan Cloister, which boasts a truly interesting history. The Franciscan Cloister, as a historically valuable building, was added onto the list of National Cultural Heritage sights in 1995. There are three permanent museum exhibitions: Mineralogy, Cloister Life, and Looking into the History of Kadaň. The mineralogy collection has been located in the cellars of the cloister since 1999.