While I was searching for something else, I came across something called Quora, which has a web page with a number of photos, but no credit given to the person who took these photos.
https://www.quora.com/Are-there-any-surviving-original-gas-chambers-from-the-Holocaust
All of the photos shown in the link above were taken by me, but no credit was given to anyone.
Whatever or whoever Quora is, this organization should print the following under their logo: “We have a license to steal, so don’t worry if your photos are stolen and used by us.”
They could add “We know that you, whoever you are, spent a lot of money to travel to foreign countries, to take these photos, but we don’t give a damn.”
Here is a link to the page on my website, where I put up this photo: http://www.scrapbookpages.com/Hartheim/gaschamber05.html

A photo that was stolen from my website
Do you know what it took for me to get this photo from a place that had a sign saying “No photos allowed”? I could have been arrested and thrown into prison in a foreign country, where I would have had a hard time getting out because I broke the law to take this photo.
On the far right side of the photo, you can see a small sign, about a foot square, which says that you will be arrested if you take a picture here.
Here is what I wrote on my website about this photo:
The photo above shows the room where a crematory oven once stood; a light shines on the spot where the oven was located. On the right, there is a hole in the floor covered with glass. Note the vaulted ceiling which shows how the ceiling of the gas chamber looked before a passageway for a ramp was cut through the walls. This is not the gas chamber, as some people have mistakenly identified it.