Saar Lor Lux
SaarLorLux or Saar-Lor-Lux (also SarLorLux in French), a portmanteau of Saarland, Lorraine and Luxembourg, is a euroregion of five different regional authorities located in four different European states. The term has also been applied to cooperations of several of these authorities or of their subdivisions, administrations, organisations, clubs and people. Member regions represent different political structures: the sovereign state of Luxembourg; Belgium's Walloon region, comprising the French and German speaking parts of Belgium; Lorraine, a region of France; the French départements Moselle and Meurthe-et-Moselle; and the German federal states of Saarland and Rhineland-Palatinate.
There is no well-defined structure of SaarLorLux nor even an exclusive definition of its size. Instead, there exist multiple forms of cooperation and contractual relations among all or several members. Sometimes instead of SaarLorLux, the term 'Greater Region' is used, short for the more formal 'Greater Region of Saarland, Lorraine, Luxembourg, Wallonia and (Western-) Rhineland-Palatinate.'
Read more about Saar Lor Lux: Organization of SaarLorLux, The SaarLorLux Region and The European Union, Problems of Cooperation