The tower was built in 1324 by order of the elector of Mainz. The Bürgerturm is octagonal, about 14 meters high and consists of quarry stone masonry.

In former times the tower was called Gysenthorme (1436), then Geisenthorm and in 1702 it was called thick tower. Since the tower was auctioned off in the 19th century, it became private property.

The Bürgerturm was extensively renovated in 2000/2001.

The battlement is still recognizable today by the tower and ran along the west side. In addition, the remains of the city wall have been preserved at the Bürgerturm. Since 1980, the tower has been designated as a monument. It is inhabited.

The object "Bürgerturm in Oberlahnstein" is a registered architectural monument (Denkmalverzeichnis Rhein-Lahn-Kreis, p. 53).