Hello, thank you for the question. We are photographers at Spacecrafting and we took the pictures of this beautiful home. Because of this we do not know any information regarding the wall. Sorry we could not be of more assistance.

I am no expert but it doesn't seem to be load bearing, also, it looks like three glass panels side by side

In construction, especially around staircases, the load is usually transferred to one of the two wall cavities. Meaning, if we look at the staircase as two parallel lines, either the left or the right side of the staircase would be the load. In this case, I would make the assumption that the load is the left side of the staircase, which follows down into the basement. Additionally, the columns act as support for the interior load beam that travels across the ceiling. There is a more technical explanation that I could write, but this is an abbreviated response. I hope it helps.