Royal Saltworks graduation tower
Royal Saltworks graduation tower, Industrial graduation tower in Arc-et-Senans, France.
This industrial structure measured 496 meters in length and 7 meters in height, featuring a pumping system powered by a diversion canal.
Built between 1775 and 1779 under architect Claude Nicolas Ledoux's direction, the tower was part of a salt production complex.
The graduation building exemplifies French industrial architecture from the 18th century and received historical monument status in 1991.
The system concentrated brine through natural evaporation using wood bundles arranged at a height of 5 meters within the structure.
A 21-kilometer aqueduct transported salt water from Salins-les-Bains to the graduation tower to achieve a salinity of 24 degrees.
Location: Arc-et-Senans
Architects: Claude Nicolas Ledoux
GPS coordinates: 47.02970,5.78990
Latest update: June 23, 2025 09:55
Royal Saltworks at Arc-et-Senans
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