On 2012, the communes of Heinerscheid and Munshause were made part of the commune of Clervaux; Hosingen, Consthum and Hoscheid were merged to made the new commune of Parc Hosingen; Ermsdorf and Medernach were merged to made the new commune of Vallée de l'Ernz; Heiderscheid and Neunhausen were joined to Esch-sur-Sûre. So the number of communes changed from 43 to 36.