26m high round bastion from quarry stone work was once part of the town fortification (south-eastern end). The entrace to the tower was high above the town wall and only accessible by a ladder.
You find a relief at the attack side that shows the archbishop John II from Nassau who accomplished the tower in 1411.
Visitations during guided tours through the brewery.
bookable: Tourist Information Lahnstein, phone: +49 2621 914171