Långholmen Prison, officially Långholmen Central Prison (Swedish: Långholmens centralfängelse), was historically one of the biggest prison facilities in Sweden with more than 500 cells, located on the island of Långholmen in Stockholm. It was built 1874—1880 as the central prison of Sweden, and was temporary closed down between 1972—1975. Afterwards, Långholmens spinnhus was moved. Today the building is being used as a hotel/hostel and museum, as well as to accommodate a folk high school.