The Swedish hotel classification is included in the Hotelstars Union, which is a common classification system for European countries. At present in addition to Sweden, Germany, Austria, Switzerland, Holland,Hungary, the Czech Republic, Estonia, Latvia, Lithuania, Luxembourg and the Finnish islands of Åland take part in the same classification system. The hotels are assessed for 270 criteria and can be awarded between 1 and 5 stars. For hotels with many extra points in each star category, a superior designation can be added.