Strolling along the banks of the Mosel from the Roman Bridge to the old fisherman’s village of Zurlauben will bring you past the Two Old Harbour Cranes, one from the 15th century the Gothic,“Alte Krahnen” (1413), and the other from the 18th century, the Baroque “Alter Zollkran” (1774), both of which used the same technology. These two cranes bear witness to the former brisk trade along the river. The cranes were treadmill, loading cranes with moveable roofs on top of a strong round structure. The treadmill inside was driven by human muscle power to move the pulleys. Later the cranes were turned over to various orders of the church.