Here stands a testament to ingenuity. I will tell you the story of the Der Hafentretkran in Rostock. This isn’t just any crane. It’s a replica. It gives us a glimpse into a time when human-powered machines were essential.
The Der Hafentretkran you see before you is a reconstruction from 1997. It got some repairs in 2008. But don’t let that fool you. Its design is based on cranes from 1780. The original crane was sold off and broken down in 1867.
Imagine a world where moving heavy objects relied on muscle power. That’s where the Der Hafentretkran comes in. This type of crane uses a simple yet effective mechanism. A rope winds around a drum. The drum is turned by a large treadwheel or a pair of wheels. People walk inside the wheel. Their weight and motion lift the load. The Romans already used this technology. A replica of a Roman crane stands in Bonn-Castell.
Between the 11th and 13th centuries, this lifting method was common along the Rhine. Those cranes often had stone bases supporting the crane’s framework. You can still see one of these cranes, called Der Alte Krahnen, near Andernach on the Rhine.
From the 13th to 16th centuries, treadwheel cranes were mainly built entirely of wood. The Der Hafentretkran in Rostock represents this type. Interestingly, the Rostocker Hafentretkran was the last of its kind ever built. The Industrial Revolution brought new lifting technologies. These new technologies replaced the older, human-powered methods.
But this crane wasn’t mainly for loading cargo. Its primary purpose was to raise masts onto newly built ships. Rostock was a shipbuilding center. It constructed brigs until the 1880s. The Der Hafentretkran was essential for this industry.
The Stadthafen or city harbor of Rostock, where the Der Hafentretkran is located, has a rich history. In medieval times, trade was focused on the harbor. More city gates led to the harbor than to the Mecklenburg region inland.
Rostock’s merchants traded with Riga and participated in the Scania Market. They also had interests in Norway. Beer was Rostock’s main export during the Hanseatic period. The harbor declined in importance as the Hanseatic League weakened. A fire in 1677 further damaged the harbor.
In 1850, things improved when England’s Navigation Act was abolished. Rostock’s shipping industry experienced a revival. In 1877, Rostock had the largest merchant fleet in the Baltic Sea region. The western part of the Stadthafen was expanded around 1910.
After Germany was divided, Rostock became East Germany’s main port for sea trade. The Stadthafen lost importance. After 1991, the Stadthafen was redeveloped. It transformed into a place with restaurants, clubs, theaters and shops. Today, the harbor accommodates workboats, passenger ships, yachts and local transport.
The Der Hafentretkran stands as a reminder of Rostock’s maritime past. It reminds us of the ingenuity and hard work that built this city. It is a symbol of a bygone era. An era when human power shaped the world.