Vieille Montagne

Vieille Montagne is the name of a former zinc mine in Kelmis (La Calamine), a town in Belgium in between Liège and Aachen. The mine's name is French for "the old mountain", and this is reflected in the its German name, Altenberg. The mine was once a bone of contention between Germany on the one and the Netherlands and later Belgium on the other side, resulting in the mine and village becoming the neutral territory of Moresnet.

It was first opened in 1805 and continued in operation until the end of the 19th century.

The mining company of Vieille Montagne also owns a zinc mine in Zinkgruvan[?] in Sweden.