Building Nr 5 was used as the telephone exchange.
The French gave the most buildings a a name for this building it is CONSTANCE.
The building is a typical Wolfsschlucht 2 type.
In the front the work spaces and behind there the bombproof bunker with a 4 meter thick sealing.
Dimensions almost 4500 m2.
This building is not only the biggest on the Camp ( 108 meters long ) it also became the biggest telephone exchange for the German Army more then 600 fixed telephone lines.
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