Althofen is considered one of the oldest still inhabited mountain settlements in Austria. Besides that, there are still remains from the former town fortification. For example, the Annenturm. This tower saw its completion in 1307.
The museum tells about the life and achievements of Carl Auer von Welsbach, who formed the Treibacher Chemische Werke GesmbH near this place. He is well known for the development of the metal filament light bulb and the gas mantle. He also discovered several rare earth elements.