Hi, @Laura2592 It's a really nice job what you're doing. Are you still working on this project? For the backsplash, I suggest a rich deep color like navy or green, or even red because is a historical house and those colors work well. You don't need anything fancy, simple ceramic works, but creates a contrast. The Parisian vibe Bistro is really cool, but I would suggest changing those chairs for something like the ones in the link that I'm sharing https://www.onekingslane.com/p/1654995-s-2-odeon-stackable-bistro-side-chair-red.do?gclsrc=aw.ds&gcl...
Also, add some scent candles on the fireplace, which help to style even if you don't use them. If you have any questions about design and decoration, you can text me any time.