Bismarck Tower, Stone monument in Viersen, Germany.

Bismarck Tower is an 18.22-metre-high stone tower on the Wilhelmshöhe, the highest point of Viersen at 84.94 metres above sea level. It stands on a base of three stepped pedestals with four corner columns of 1.80 metres diameter, three-quarters visible from outside. A steep iron staircase of 60 steps leads to the viewing platform, and the west door bears the Bismarck coat of arms and the motto "In trinitate robur".

Construction began in 1900 after local citizens raised funds and held a design competition that drew hundreds of architectural proposals. The project grew from the community's strong desire to commemorate the nation's first Chancellor.

This monument belongs to a movement of Bismarck towers built across Germany to honor the first Chancellor and founder of the unified nation. These towers still stand today as markers of that historical veneration across the country.

The tower has been closed to climbers since the 1970s; damage has made access to the platform permanently excluded. Visits are limited to the exterior, reached on foot through the Hoher Busch woodland. The Viersen beautification association, the local heritage society and the city are planning a renewed restoration and reopening.

Until World War I, an annual beacon ceremony took place on Bismarck's birthday, with flames leaping up to 5 meters high into the night sky. This spectacular tradition vanished during the war years and is no longer performed today.