I suggest moving the piano to that corner, placed kitty corner. That would fill the space nicely I think. Worth a try. It's a beautiful space.

Every space does not have to be filled. The idea of negative space says that the eyes can rest. I personally like more space than stuff. If you put something there, you may find that it is then too crowded! If anything, I would put a skinny table and lamp (at chest height) there. And a skinny upholstered chair on the diagonal.

I agree that the empty space is fine. Space is good!

But since you are asking - one idea to fill out the area would be a large plant or tree, versus all the small ones. Live plants are wonderful, and you have them. But since you have young children and a dog, if having and/or taking care of a large plant or tree would be an issue, you could consider faux for that spot. There are some nice options in the higher quality faux plants. You can do a search for the Best Rated, etc. Another idea would be to build a window seat setup in that corner there - or, you could really just put an upholstered bench in front of each window.

This article has various corner window ideas: https://www.shelterness.com/corner-window-ideas-pros-cons/

Empty space is lovely. You have a ton of useful areas in this room and the dining room and I wouldn't go searching for an activity type function for this space. I was going to suggest a potted tree, however, when looking at that corner from standing in the entry hall, I'm not so sure I'd like it. Fine up front, but maybe not right from the long view.

I do like the idea of a low benches / narrow table in front of one of the windows with your plants on them. It will keep the space from being empty.

Pianos are not to be on outside walls so if you move it to that corner it wil have to float with the player's back to the windows.... Is there no way to expand your seating area to incorporate the corner and have an audience for the piano?

How about putting a nice chaise on the diagonal in that space with a floor lamp and a tall plant or large faux tree? It would be a nice place to relax and read or take a nap.

Pooch not gonna like that. He likes the space. Just sayin'.

I agree not every space needs filling I would lower the art above the piano and done .I am just happy yhe space is not silled with toys.

Having a sitting area would be nice visually to off set the weight on opposite wall and from a practical perspective, is a sunny little spot to read, enjoying the view, and listening to the piano. Test the feel by placing your occasional chair there to see what you think and imagine a comfy chair that does not feel heavy.

I’d remove the plants on the floor and hopefully you can lower the hem on the drapes so they touch the floor.

Get a new dog bed for your adorable pup. Something a bit fancy! And…perhaps, a small basket placed nearby for her/his toys? Done!

What a lovely room, you have a great sense of style.

Looking at this room and the adjoining ones, you have a lot of seats — extra chair(s) in dining room, stools in entry, plenty of seats in the living room — I don’t think you need another piece of furniture there.

I’m sure you’ve considered it, and there’s a reason you didn’t already do it.

I like the idea mentioned of a large plant/small tree to bring some life to that corner. I’d either have just one in a large pot or would find a beautiful table/plant stand to place one plant on in kind of a sculptural way (in front of the window without the floor vent).

Plant(s) make sense there, as the light is so good for them.

There‘s already a lot of furniture in the room, so I’d keep anything added very simple or just leave it as is. It’s a beautiful, serene, well-balanced room that already sounds like it functions well … every inch doesn’t need to be filled for the sake of being filled.

My take on the space is that it is dull. You have lively art on the wall beyond the spindles and beautiful blue in the dining room. Bring some of those colors into living room. I know you want the room for calm but I qould still weave some color into it. Leave the corner as is.

My thought on moving the piano to that spot, kitty corner, is to fill that space but also open up the entrance to the other room. And as another said to have the player face into the room instead of looking at the wall.

Are the backs of that type of piano attractive? Just curious, I’ve never seen the back of one.

I like it as it is, but I’m a ”less is more” person. IF you feel it still needs something, elevate the zig zag plant or add a larger plant on a stand in the corner. Don’t move the piano into that corner.

Thanks, All! I knew I could count on this community for help. I've started lengthening the curtains, bought some midcentury wooden plant stands to raise the plants, and ordered a fiddle leaf fig tree.

I agree - The piano looks so pretty angled in that corner! However, the back is unfinished and looks awful from the outside. Plus, I don't think it would do well on an outside wall.