Did Mauthausen have homicidal gas chambers?

The Museum at Mauthausen maintains that a room in the basement of the building that now houses the Museum is a homicidal gas chamber, disguised as a functioning shower room. Numerous ... Choumoff was an engineer who had post-graduate degrees in mathematics; he was the author of numerous scientific articles. read more

Mauthausen gas chamber testimony Previous. The Museum at Mauthausen maintains that a room in the basement of the building that now houses the Museum is a homicidal gas chamber, disguised as a functioning shower room. read more

Yes. But the main method of extermination was harsh labour in the stone quarry with a life expectancy of less than three months, including starvation random shooting or work related 'accidents'. read more

So the "proof" of the existence of the "gas chambers" (sic!) at Mauthausen is photo nr.3. I'm sorry, but the room looks to me like nothing more than a simple shower room and one can see nothing that would lead one to think that it was a homicidal gas chamber with all the equipment which in such a case would have been indispensable. read more