I have this corner in my basement

https://midwest.social/post/34515442

Having examined the picture for several minutes, I can indeed confirm that it is a corner.

I’m not sure what size it is, as you’re using mediæval units, but I think a cat tree would probably fit in there. If you don’t have a cat, just put the tree, and leave the door open.

In my initial post I mentioned it is 20 in wide, with a 60 in clearance. I mean I guess inches are medieval, but I can’t tell if you’re being obtuse, European, or an asshole. Not that I can discern a difference between the latter two.

Cat tree is not a bad idea, except I live down here with my partner and he’s allergic.

Well, since you’re being so nice about it, my advice is to kick your partner out and get the cat you always secretly wanted.