France - From the Great Saltworks of Salins-les-Bains to the Royal Saltworks of Arc-et-Senans, the production of open-pan salt

"The Royal Saltworks of Arc-et-Senans, near Besançon, was built by Claude-Nicolas Ledoux. Its construction, begun in 1775 during the reign of Louis XVI, was the first major achievement of industrial architecture, reflecting the ideal of progress of the Enlightenment. This vast, semicircular complex was designed to permit a rational and hierarchical organization of work and was to have been followed by the building of an ideal city, a project that was never realized. The Great Saltworks of Salins-les-Bains, where brine has been extracted since the Middle Ages if not earlier, features three buildings above ground: salt stores, the Amont well building and a former dwelling. It is linked to Claude-Nicolas Ledoux’s Royal Saltworks of Arc-et-Senans and bears testimony to the history of salt extraction in France." 

Source: UNESCO World Heritage