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Ouvrage Four-à-Chaux: Wikis


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Coordinates: 48°59′49″N 7°07′49″E / 48.99694°N 7.13028°E / 48.99694; 7.13028

Ouvrage Four à Chaux
Part of Maginot Line
Northeast France
Block 6 and the array of anti-tank rails
Concrete, steel
Open to
the public
Controlled by France
Battles/wars Battle of France
Ouvrage Four-à-Chaux
Type of work: Large artillery work (Gros ouvrage)
Fortified Sector of the Vosges
└─Subs-sector of Langensoultzbach
Work number: A4
Constructed: 1930-1938
Number of blocks: 8
Strength: 580

Ouvrage Four à Chaux was a grand ouvrage of the Maginot Line, located in the community of Lembach, France, in the Bas-Rhin département. Four à Chaux was adjoined by petit ouvrage Lembach and gros ouvrage Hochwald, and faced the German frontier. A "four à chaux" is a lime kiln in French, and the ouvrage was located in the area of a limestone quarry and kiln, which operated until 1939.

The ouvrage comprised eight blocks, with six combat blocks and two entries. The significant change in level between the combat blocks and the ammunition entrance required an inclined gallery immediately after the ammunition entrance. There was a 24 meter elevation difference between the ammunition entrance and the higher personnel entrance.

Four à Chaux is a position of medium importance on the Line, covering an area of 26 hectares, with a garrison of 477 men, 78 non-commissioned officers and 25 officers, 4.5 km of subterranean galleries and six combat blocks.

Block 1 was destroyed using explosives by the Germans before the surrender in 1945.



  • Personnel entrance: one machine gun embrasure (JM) and one automatic rifle cloche (GFM).
  • Ammunition entrance: one machine gun/47mm anti-tank gun embrasure (JM/AC47), and two GFM cloches.
  • Block 1 (destroyed): one 135mm gun turret and two GFM cloches
  • Block 2: one 75mm gun turret, one GFM cloche and one machine gun cloche (JM).
  • Block 3: one 81mm mortar turret, one GFM cloche and one grenade launcher cloche (LG).
  • Block 4: one observation cloche (VDP), one GFM cloche and two JM cloches.
  • Block 5: one machine gun turret and one GFM cloche
  • Block 6: one JM embrasure, one JM/AC47 embrasure, one GFM cloche one JM cloche and one VDP cloche.


On 19 June, 1940, Four à Chaux and Lembach were bombed by German Stukas, with little effect [1].


Today, Four à Chaux is open to the public under the guidance of the SILE association. The guided visit includes Block 2, the barracks, principal gallery, usine and the museum. The ouvrage may be visited throughout the year.

External links


  • Allcorn, William. The Maginot Line 1928-45. Oxford: Osprey Publishing, 2003. ISBN 1-84176-646-1
  • Kauffmann, J.E. and Kaufmann, H.W. Fortress France: The Maginot Line and French Defenses in World War II, 2006. ISBN 0-275-98345-5


  1. ^ Kauffmann, p. 172

See also



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