Timeline

Heritage classified

Key figures

Origin and history

The Rozan lime oven, located in Crozon (Finistère), was built in the 2nd quarter of the 19th century by the company Boulet et Cie after authorization of the sub-prefect of Châteaulin in 1839. Placed at the mouth of the Aber, it had maritime access for the supply of local limestone and fuel (wood or coal), as well as for the shipment of lime barrels. Its optimised design, with a massive tower in rubble and an ovoid interior lined with refractory bricks, allowed efficient production. The furnace was integrated into a regional economic network including Douarnenez Bay and Brest Harbour, where lime was used for mortars, coatings and soil modification.

The operation of the furnace ceased around 1872, after a storm damaged the structure. Abandoned during World War I, it was rediscovered and cleared by Brussels Scouts in 1984. The site, acquired by the Conservatoire du littoral in 1983, was listed in the Historic Monuments in 1988 and restored in 1989. Nearby, a medieval motte (received from 1835) suggests an ancient occupation of this strategic site. Today, the oven illustrates the Breton industrial heritage and its integration into a preserved landscape, although its access is limited by the statutes of the Conservatory.

The construction of the kiln met an increasing demand for lime, particularly for the work of the port of Brest and its fortifications in the 19th century. The limestone came from local quarries or dune sand, while the fuel (wood from the Landevennec forest or coal) arrived by sea. The exceptional quality of granite equipment, rare for this type of building in Brittany, demonstrates a significant investment. The Rozan oven, the last and largest in the Crozon peninsula, marks the climax and then the decline of this industry in the face of competition and climatic hazards.

The site of Rozan, classified in 1933 for its landscaping interest, now belongs to the Conservatoire du littoral. Although protected, the oven cannot be built. Initiatives, such as the installation of explanatory panels or its integration into the Fortifications Route (2007), aim to enhance this heritage. Its history also reflects the region's economic changes, where lime and brick kilns, active since the 18th century, have gradually disappeared in favour of new industries.

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