Shortly after the German-French War (1870-1871) and the resulting founding of the German Reich, the citizens of the city of Gandersheim decided to erect a lookout tower in honor of Emperor Wilhelm I on the Clusberg.
The foundation stone was laid in 1875, but the tower was to be completed 25 years later, with a solemn inauguration on 30 September 1900.
As with other similar projects of that time (see: Gaußturm in Dransfeld), there were also financing problems that delayed the construction, and eventually even led to a change in the construction. First, the entire tower was planned in massive construction, but ultimately only the base was built in stone and the upper part in wood construction set on it.
After the inauguration of the Wilhelmsturm quickly became a popular destination. From the top of the tower, which towered over the treetops, one could - as one might assume - enjoy an impressive panoramic view. The Wilhelmsturm also became a landmark of Gandersheim, which was found on postcards from that time. Here are two examples showing the tower in the planned (unrealized) stone construction: http: //vergessene-orte.blogspot.de/2013/03/wilhelmsturm-in-bad-gandersheim.html