Technology
The ancient Romans also had a complex system of aqueducts, which were used to transport water across long distances. The first Roman aqueduct was built in 312 BCE. The eleventh and final ancient Roman aqueduct was built in 226 CE. Put together, the Roman aqueducts extended over 450 kilometers, but less than seventy kilometers of this was above ground and supported by arches.
Minden Aqueduct
The first canal bridge over the river Weser was built in 1914. It is a 370-metre-long concrete construction. At the end of World War II it was destroyed by the retreating "Wehrmacht" in 1945. In 1949, the renovated bridge was re-opened.