Eifel aqueduct in Cologne
The capital of the province of Lower Germania, the city of Colonia Claudia Ara Agrippinensium (today’s Cologne, Germany), due to its importance, had a high demand for running water. It was collected from the mountainous Eifel region 100 km away, thanks to an aqueduct capable of transporting up to 200,000 cubic meters of water per day.