Bundenbach is an Ortsgemeinde – a municipality belonging to a Verbandsgemeinde, a kind of collective municipality – in the Birkenfeld district of Rhineland-Palatinate, Germany. It belongs to the Verbandsgemeinde Herrstein-Rhaunen, whose seat is in Herrstein.
For its roughly 400-million-year-old fossils of Placodermi and other creatures from the Devonian, Bundenbach is said to be a world-class fossil Lagerstätte.
The municipality lies on the Hunsrück Schiefer- und Burgenstraße (“Hunsrück Slate and Castle Road”).
The nearest major towns are Kirn, Idar-Oberstein and Simmern. Neighbouring municipalities are Rhaunen, Bollenbach, Schneppenbach and Bruschied.
Also belonging to Bundenbach are the outlying homesteads of Neumühle and Reinhardsmühle.
The area was settled in protohistory, which is proven by digs undertaken by the Rheinisches Landesmuseum Trier (Trier Rhenish State Museum) from 1971 to 1974 at the Altburg (“Old Castle”) on a mountain spur near Bundenbach, inside a bow in the tributary Hahnenbach. Standing there from about 170 to 50 BC was a Late Iron Age, Late Celtic fortification complex, or castellum, of the Treveri, a people of mixed Celtic and Germanic stock, from whom the Latin name for the city of Trier, Augusta Treverorum, is also derived. This hill castle was first laid out as a lightly fortified settlement on the heights and only later given strong walls. The last traces of human presence there vanished in the mid 1st century BC. It is said to be the most thoroughly explored complex of its kind.
As a result of the exploratory digs, the Altburg has been partly restored to its form in the 1st century BC, and has been expanded into a unique, protohistoric open-air museum. The Freilichtmuseum Altburg was dedicated and opened to the public in 1988.
Bundenbach's founding may be placed in the earlier half of the 10th century. It had its first documentary mention, though, in a Waldgravial partition document on 14 March 1283. The Waldgraves had the forest cleared and thereby gained freehold land for themselves.