Rhineland-Palatinate
The state of Rhineland-Palatinate was founded shortly after the Second World War on 30 August 1946. It was formed mainly from the southern part of the Prussian Rhine Province (the "Regierungsbezirke" of Koblenz and Trier), from Rhenish Hesse, from the western part of Nassau and the Bavarian Rhenish Palatinate minus the county of Saarpfalz. The Joint German-Luxembourg Sovereign Region ("Gemeinschaftliches deutsch-luxemburgisches Hoheitsgebiet") is the only unincorporated area of the state of Rhineland-Palatinate. This condominium is formed by the rivers Moselle, Sauer, and Our, where they run along the border between Luxembourg and Rhineland-Palatinate or the Saarland.
Wiesweiler
After the Second World War, the village lay at first within the "Regierungsbezirk" of Koblenz in the then newly founded state of Rhineland-Palatinate. In the course of administrative restructuring in Rhineland-Palatinate in 1968, the "Amt" of Grumbach was dissolved. Wiesweiler passed in 1972 to the then newly founded "Verbandsgemeinde" of Lauterecken, and at the same time also from the "Regierungsbezirk" of Koblenz to the newly founded "Regierungsbezirk" of Rheinhessen-Pfalz (the system of "Regierungsbezirke" in Rhineland-Palatinate has since been abolished).