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Camp du Ban-Saint-Jean is a former military camp near Boulay-Moselle in France. Totally abandoned today, it was used during World War II as a stalag (German POW camp). During the Cold War, Boulay and Ban-Saint-Jean were the site of one of two NATO secret bases named "Big Ears", dedicated to listening to radio communications from the East. Giant sophisticated antennas and the most modern radio communications systems were operated under the protection of the French Army's 718th company of transmissions. Hundreds of trained specialists scrutinised the radio signals to detect military manoeuvres from the East, triggering alerts as soon as any alarming message was detected and deciphered.
Source: Wikipedia article lead, CC-BY-SA.
Capacity
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Operational
Figures from official sources · verified 22 May 2026 · methodology
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Population held
Mixed/unknown
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Death-row facility
No
No conditions summary available yet.
No visiting information available.
No mailing information available.
Contact the operator's website for inmate-specific procedures.
No major issues documented in our database.
No public contact details available.
Derived signal — not a judgement. How it's calculated
Same country, matched on type + security level where possible.
How many of our profile fields are populated. We surface this so families and researchers know the limits.
Under CC-BY-4.0. Include the URL and access date; the site is a living reference and entries can change.
World Prisons. (2026). Camp du Ban-Saint-Jean. Retrieved July 21, 2026, from https://worldprisons.com/prisons/camp-du-ban-saint-jean
"Camp du Ban-Saint-Jean." World Prisons. Accessed July 21, 2026. https://worldprisons.com/prisons/camp-du-ban-saint-jean.
@misc{worldprisons-camp-du-ban-saint-jean,
author = {{World Prisons}},
title = {Camp du Ban-Saint-Jean},
year = {2026},
url = {https://worldprisons.com/prisons/camp-du-ban-saint-jean},
urldate = {2026-07-21}
}