The Ehrenberg is a mountain to the east of Ilmenau

Ilmenau

Ilmenau is a town located in the district of Ilm-Kreis, Thuringia, Germany.Ilmenau is situated in the valley of the Ilm river, at an altitude of 431 metres above sea level, and is the biggest town in Ilm-Kreis district, with 6,200 students studying at the Technische Universität Ilmenau. The...

, rising to a height of 528 meters and standing opposed to the Traugberg. The border between Ilmenau and Langewiesen

Langewiesen

Langewiesen is a town in the Ilm-Kreis district, in Thuringia, Germany. It is situated on the river Ilm, 4 km southeast of Ilmenau....

 runs through its apex, which is marked by a large wooden cross. It is home to part of the campus of the Technische Universität Ilmenau

Technische Universität Ilmenau

The Ilmenau University of Technology is the technical university of Thuringia and located in Ilmenau Germany...

 (Technical University of Ilmenau) and the Bundesanstalt für Wasserbau (Federal Institute for Hydraulic Engineering). On July 22, 2006, approximately 6,000 square meters of the Ehrenberg were destroyed in a forest fire, although damage to human structures was limited. The body of the Ehrenberg itself is notable geologically for containing hydrobiotite, sometimes also called voigtite.