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Heritage classified

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Origin and history

The Mondière forges, located in the Thiers Mills Valley (Puy-de-Dôme), are an old factory specializing in stamping knife blades. Founded in the early 20th century on the site of an ancient 15th century wheel, then a stationery and sawmill, the factory has its industrial climax thanks to the hydraulic strength of the Durolle. It produces blades for prestigious brands such as Christofle or Colliot, before closing abruptly in 1984 under pressure from Asian competition and local economic change.

The site, purchased by Thiers City Hall in 1984, was listed as a historical monument in 2002 for its exceptional technical heritage: hammer-pilons, hydraulic turbines, and production machines have remained in place since the end of activity. Despite rehabilitation projects (cutlery museum, cultural space), only security work was carried out, notably after the partial collapse of the roof in 2018. Today at risk, the Mondière forges symbolize both the Thiernois cutlery know-how and the challenges of preserving industrial heritage.

The architecture of the Mondière forges reflects its industrial evolution: embedded in the gorges of the Durolle, the factory combines walls made of granite bellows, wooden panels, and shed roof with lanterns. Four successive workshops, including one on the rock, house vestiges like a wheel courier with blades. Nearby, an annex from 1914 served as a dwelling for the director and as offices. The site, although closed to the public, still inspires artists and cultural projects, such as the metal sculpture symposium of 1985 or the works of George Trakas integrated into the landscape.

The factory valley, the historic heart of the Thiernois cutlery, saw its activities decline in the 20th century with electrification and relocation of enterprises to the plain. The Mondière forges, unlike the factory of May (now a space for exhibitions) or the Creuse of Hell (contemporary art centre), have not yet found a second life. Their safeguard remains an issue for the municipality, which relies on their tourism and memorial potential, in a region marked by post-industrial conversion.

The process of making knives at the Mondière forges illustrated the local expertise: steel bars were stamped, hammered hot and then punched before the final assembly. This production chain, which was originally dependent on the Durolle's hydraulic force, gradually turned to electricity in the 20th century. The closure of 1984 frozen this technical heritage, offering a rare testimony of the industrial seam methods, today threatened by the state of degradation of the building.

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