ᐅ Load-bearing wall made of this material?

Hello,

I want to remove a wall (with a thickness of 11.5cm (5 inches) in the floor plan) in a house built in 1962. See photos.
What type of material is this?
Could it be a load-bearing wall?
There are no walls directly above or below this location on the floors above and below.

Thank you very much in advance for your help!

Thomas

This is a structural engineer’s favorite topic—giving an opinion from a distance without any further knowledge! Can you not even provide floor plans? Are there wooden floorboards on the upper floor where the direction of the joints can be seen? Very likely, it will not carry the load, but ....

It's best to consult a structural engineer... it is probably not load-bearing but can serve as bracing, so a section of wall should remain on both the right and left sides.

Given the age of the house, there should be a structural calculation in the building records. So, head to the building authority and request a copy. Everything is documented there, and if necessary, a structural engineer can explain it.

Looks like pumice stone. Load-bearing?

Thank you very much for the responses.
I also strongly suspected that the wall is non-load-bearing.
Today, we had the opportunity to examine the situation in an identical house without the wall. There, no beam was installed, and the owners had consulted a structural engineer at that time.
So the wall can be removed.