Always appreciate those. In case you haven't seen it, Wikipedia hosts a 15,000 pixel-wide panoramic photo of chamber A/III interior.Fred Ziffel wrote: ↑Fri Jan 16, 2026 6:53 am If you go on Google Earth (Not Google Maps), someone called Surgey Rudavin, bless his heart, took a 360 of the room.
https://commons.wikimedia.org/wiki/File ... r_Pano.jpg
I hadn't noticed it before, but you're right that there might be a faint blue patch under the viewport. Funny how there's more physical evidence for a Zyklon gassing there than on the opposite side of the wall.Fred Ziffel wrote: ↑Fri Jan 16, 2026 6:53 am You can see some blue staining on the B1 side, more than the “A” side [...]
An empty can or cans might do it. They may have had a bad procedure or someone not following the procedure once.Fred Ziffel wrote: ↑Fri Jan 16, 2026 6:53 am Therefore, I say empty cans of Zyklon B stained the walls on the inside, and on the outside wall, “Stain 14” was due to HCN gas coming out of the “A” Chamber and because of that, “Stain A” was also a result of HCN gas escaping out the doorway of “A” Chamber.
But the hypothetical person who backed out of the chamber with the empty cans could have left them outside next to the door as easily as anywhere else. I would still suggest that this is a more likely cause for the exterior stains (A and 14).
The Soviet report gives us some measurements that we can use. The height of a tall can of Zyklon B was 31.5 cm, the width of this wall was 1.13 m on the inside, and the height of one room on the inside was 2.2 m. Making some rough assumptions, we can visualize approximately how a can would look there.

The stain appears to line up perfectly at 31.5 cm.
