The fountains, gardens, and baths of the Baroque palace required an abundant water supply, and a new system had to be built.
The Baroque water supply system gathered water from a large number of springs, then carried it down, over the Lahn river, and up to the town and castle.
The system supplied water until the end of the 1800s, when it had to be abandoned due to lack of maintenance.
It is now being researched and restored.

The waterpipes were originally carried over the Lahn by the Rothe Brücke.
In 1784, high water and ice jamming destroyed this bridge, and in 1785-1786 it was replaced by the Kettenbrucke ("Chain Bridge"), which remained in service until 1934.
The fountains, gardens, and baths of the Baroque palace required an abundant water supply, and a new system had to be built. The Baroque water supply system gathered water from a large number of springs, then carried it down, over the Lahn river, and up to the town and castle. The system supplied water until the end of the 1800s, when it had to be abandoned due to lack of maintenance. It is now being researched and restored. 
The waterpipes were originally carried over the Lahn by the Rothe Brücke. In 1784, high water and ice jamming destroyed this bridge, and in 1785-1786 it was replaced by the Kettenbrucke ("Chain Bridge"), which remained in service until 1934.
Schloss Weilburg