Possenturm (Thuringian Stamp Station No. 107)

The Possenturm (location) is considered the oldest and tallest half-timbered observation tower in Europe. The observation tower was built in 1781 within 11 months and stands on a quarry stone base. The tower's height measures 42.18 m. It also served as a landmark in the surveying of the Schwarzburg region. Hikers could also see the Possenturm from the highest mountain in the Harz Mountains, the Brocken, from the "tower of the inn," "sometimes with, sometimes without a telescope." If you "turn right [...] you can see the ruins of Kyffhausen Castle in the Golden Meadows, the Possenturm near Sondershausen, and the Ettersberg near Weimar," according to Friedrich Gottschalck's 1823 pocketbook for travelers to the Harz Mountains.
Source: Wikipedia

It is 42 meters high.
There is also a stamp office

Touringen.de ♟️107 "Fachwerkturm Possen" on the jungle path Possen.