No not too high...take everything else off mantle
Picture may be too large..post another pic after removing everything else

Picture is too large. Art over the FP looks best when the size is proportional. Look for something the size of the fire box

Picture is too large. Choose a smaller one and try leaning the picture on the mantle since the mantle is already high. Less is more, remove everything else.

I agree that it's too large. I also think the texture of the image mimics the tile on your fireplace in a way that they're not sitting well with each other. The throw pillow in the foreground also matches the painting a bit too literally for my taste since it uses all of the same colors.

Yes, I agree... perhaps art with a bit of black, and less colorful.. to draw your eye to it.... right now it’s a bit messy. Keep it simple.

I’ll be the sole dissenter. I don’t think the art is too large. I’ve never really understood the “not bigger than the firebox” thing. I think as long as it doesn’t extend beyond the mantel it’s fine. I’d remove the small items on the mantel.

If you love the picture there, have nothing on the mantel

I agree with the other posters re: the size. Is there another place you could hang the picture in the room? The colors and "textures" are great - it just WAY overpowers your fireplace. Plus, there is a lot of symmetry on that wall - a bit less symmetry would add visual interest. How about a smaller picture, offset to one side and setting on the mantel, with something like this on the other side...

Hard to judge without seeing more of room. Agree that items should be removed from mantel as detracts from strong detail of art. Agree maybe pillow in foreground is too “matchy” with art but again hard to say with limited view of room. Can we see more? That aligator / crocodile on mantel kind of whimsical - maybe it stays on mantel - remove the book he’s holding & slide him to left side by TV - remove the other photos etc which aren’t being displayed effectively there.

IMO the mantle over your fireplace is too high. I would have used the same spacing for the marble above the firebox as was used on the sides. That would provide you with more space above the mantle for art.

It's too big to my (non pro) eyes. I've often used jck910's suggestion of the firebox as a size guide. However, you could go a bit larger in this case. Nothing on the mantel.

I love it, it's fascinating and not too big for me. I have huge fresco sculpture piece over one of my mantles and carvings on birds that I created under the sculpture. The first thing people say when entering the room is always complimentary. If you love it, do it your way.