La Chaux-de-Fonds embodies a unique architectural and urban treasure, inscribed on the UNESCO World Heritage List in 2009 along with its twin town, Le Locle. This international recognition recognizes the watchmaking urban planning of La Chaux-de-Fonds, designed specifically to support the growth of a booming watchmaking industry in the 19th century. What was once a simple village has become an industrial city whose every street tells a story. Behind the discreet appearance of its facades, the city reveals a visionary architectural organization: the grid plan harmonizes bright buildings and artisan workshops in a perfect balance between residential life and professional activity. Each building, each street fits into this urban symphony, where watchmaking expertise is inscribed in the city's foundations. This heritage bears witness to an impressive renaissance after the fire of 1794, which allowed La Chaux-de-Fonds to reinvent itself as a model city.