The municipality lies on a ridge in the Hunsrück between the deeply cut valleys of two local streams, the Wohnrother Bach and the Dünnbach at an elevation of some 400 m above sea level. The municipality’s centres (Ortsteile) of Buch and Mörz lie some 45 km southsouthwest of Koblenz and 4 km west of Kastellaun.
In 1052, Buch had its first documentary mention. In 1332, Louis the Bavarian acknowledged to Archbishop Baldwin of Trier all the holdings of the Archiepiscopal Foundation of Trier, among which were Balduinseck (castle) and Buch. Buch belonged to the Beltheim court. Until the late 15th century, it is known that there was a knightly family named “von Buch”. Beginning in 1794, Buch lay under French rule. In 1815 it was assigned to the Kingdom of Prussia at the Congress of Vienna. Since 1946, it has been part of the then newly founded state of Rhineland-Palatinate. The municipality in its current form came into being on 17 March 1974 through the amalgamation of the municipality of Buch with what was until then the self-administering municipality of Mörz.
Buch’s mayor is Joachim Mertes, who is also a member of the district council (Kreistag) and the Rhineland-Palatinate state legislature (Landtag). His deputies are Monika Zimmer and Elmar Kremer. The outlying centre of Mörz also has an administrative head on council bearing the title Ortsvorsteher. The current one is Willi Huth.
Im Gäßchen 7 – timber-frame Quereinhaus (a combination residential and commercial house divided for these two purposes down the middle, perpendicularly to the street), partly solid, 19th century
Mörsdorfer Straße 1 – Quereinhaus; building with hipped mansard roof, timber framing plastered, about 1880, stable-barn wing from late 19th or early 20th century; whole complex of buildings
Balduinseck castle ruin (monumental zone) – built beginning in 1325 by Archbishop Baldwin of Luxembourg, finished about 1332, by 1780 in disrepair, parts of the courtyard wall renovated in 1966; castle courtyard with mighty residential tower, bailey with partial moat
On a byway of Landesstraße 203, going towards Mastershausen – basalt wayside cross, marked 1775
At the Landesstraße 204/Kreisstraße 30 crossroads – cast-iron wayside cross, 19th century
On Landesstraße 203 southwest of Buch on a ridge – chapel; quarrystone building, marked 1878
On Landesstraße 204 east of Buch – sandstone wayside cross
Mörz, Hauptstraße 13: Catholic Church of the Assumption
Catholic Church of the Assumption (Katholische Kirche Mariä Himmelfahrt), Hauptstraße 13 – aisleless church, marked 1735/1736, with parts of walls from the foregoing mediaeval building, conversion possibly in 1783; old graveyard, two grave crosses, marked 1771 and 1717; wooden cross, marked 1814; whole complex of buildings
North of the village – Sabelsmühle; three-floor mill building, partly quarrystone or partly slated timber framing, stable, barn, 1848; whole complex of buildings with bridge
West of Mörz – grave cross; Rheinböllen Ironworks, latter half of the 19th century