The Ehrenberg is a hill to the east of

Ilmenau Ilmenau () is a town in Thuringia, central Germany. It is the largest town within the Ilm district with a population of 38,600, while the district capital is Arnstadt. Ilmenau is located approximately south of Erfurt and north of Nuremberg w ...

, rising to a height of 528 metres and standing opposite the Tragberg. The border between Ilmenau and

Langewiesen Langewiesen is a town and a former municipality in the Ilm-Kreis district, in Thuringia, Germany. Since July 2018, it is part of the town Ilmenau. It is situated on the river Ilm, 4 km southeast of Ilmenau Ilmenau () is a town in Thuring ...

runs over its summit, which is marked by a large wooden cross. It is home to part of the campus of the

Technische Universität Ilmenau The Technische Universität Ilmenau (''Ilmenau University of Technology'', TU Ilmenau) is a German public research university located in Ilmenau, Thuringia, central Germany. Founded in 1894, it has five academic departments (faculties) with abo ...

(Technical University of Ilmenau) and the Bundesanstalt für Wasserbau (Federal Institute for Hydraulic Engineering). On 22 July 2006, around 6,000 square metres of the Ehrenberg were destroyed in a forest fire, although damage to buildings was limited. The body of the Ehrenberg itself is notable geologically for containing hydrobiotite, sometimes also called voigtite.Dana, James Dwight. ''Manual of Mineralogy and Lithology: Containing the Elements of the Science'', J. Wiley & Sons, 1886, p. 314.

References

Hills of Thuringia Ilmenau {{IlmKreis-geo-stub