The museum sign for Compound B1B claims that the above circled building: BW 5a (BW is an abbreviation of Bauwerken, which translates to Building) was "Showers", but the building also had other purposes, it was where prisoners' clothing and bedding was treated with Zyklon B to kill lice. Unlike any of the seven "homicidal gas chambers" at Auschwitz I and Auschwitz-Birkenau, this building has the tell-tales signs that in came into contact with vast quantities of hydrocyanic gas = Prussian Blue staining
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| South wall of delousing chamber |
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| South wall of delousing chamber |
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| North wall of delousing chamber |
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| North wall of delousing chamber |
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| North wall of delousing chamber |
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| East wall of delousing chamber |
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| East wall of delousing chamber |
