Underground Fortress

  • French
  • German
  • English

The underground fortress featured 400-metre long parrallel galleries, linked by four perpendicular galleries, and could hold up to 2,000 men. It was therefore used as a shelter (mess, baker's cooperatives and, of course, a hospital) and some members of the local council also exercised their functions from within the galleries.

On 13th September 1916, the President of the French Republic awarded the town the Legion of Honour, the French War Cross and six Allied decorations (Great Britain, Italy, Belgium, Russia, Serbia and Montenegro) in the presence of Generals Joffre, Pétain and Nivelle.

But the Citadel went down in French History on 10th November 1920 when Private Auguste Thin chose the body of the Unknown Soldier - who today rests under the Arc de Triomphe in Paris - from eight coffins representing the various different French battlefields. When making his choice, the private added together the numbers of his regiment (the 132nd) and therefore picked out the sixth coffin.

Period and opening times

Open every day :

  • February : 9:30 a.m. - 12:00 p.m. / 1:30 p.m. - 5:00 p.m.
  • March : 9.30 a.m. - 5.30 p.m.
  • April / May :  9 a.m. - 6 p.m.
  • June / July / August : 9 a.m. - 7 p.m.
  •  September / October : 9 a.m. - 6 p.m.
  • November : 9 a.m. - 5.30 p.m.
  • December : 9:30 a.m. - 12 p.m. / 1:30 p.m. - 5 p.m.
  • Underground fortress closed from December, 23rd 2017  evening to January, 31st 2018 included.
  • Last departure 45 minutes before close
Please contact them to book your visit : 03 29 84 84 42
You can seeThis site presents a unique reconstruction of the lives of the "Poilus" (french soldiers) during the First World War.
The visit is conducted underground in a small train, which passes through underground rooms and passages.
Visitors can also see a reconstruction of a trench battle and the scene in which the Unknown soldier was selected.
Visits in french, english, german, dutch, italian, spanish.

You need a booking to visit the underground Fortress. Phone : 0033 3 29 84 84 42
Prices for Adult Groups
  •  € 7 per adult
  • 1 free person for 20 paying people
You need to be more than 20 people to benefit from this price.
GPS coordinates
Latitude : 49.15771
Longitude : 5.37647
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