Bismarck Tower, Monument tower in Hagen, Germany

The Bismarck Tower in Hagen is a 24-metre tower on the Goldberg, built in 1900–1901 to a design by Wilhelm Kreis closely following his "Götterdämmerung" fire-column concept. Its exterior is Ruhr sandstone and its interior cut greywacke; the only exterior ornament is a relief of the Imperial Eagle with the Bismarck coat of arms at the entrance.

The structure was built in 1901 as part of a nationwide effort to create monuments honoring Otto von Bismarck, Germany's first chancellor. This initiative emerged from the desire to recognize Bismarck's role in establishing the modern German state.

The tower represents a widespread movement that honored Bismarck as the founder of the unified German nation through monuments placed across the country. Visitors today can observe how such structures shaped the landscape and the importance people attached to them at the time.

The tower has been open to visitors only on certain days since its reopening on 5 July 2014; from April 2006 to 2014 access was blocked by a temporary construction fence. It stands on the Goldberg at 265 m and is a station on the 11.6 km Drei-Türme-Weg, which also passes the Kaiser-Friedrich-Turm and the Eugen-Richter-Turm.

The tower's design derives from Wilhelm Kreis's 1899 competition entry "Götterdämmerung", a fire column that was built 47 times until 1911. Hagen's version, completed on 2 July 1901, was among the first Bismarck columns. Its only exterior ornament is a relief of the Imperial Eagle with the Bismarck coat of arms above the entrance.