Id put a bench there that has storage under as well

An open console and a lamp. Get rid of the rest. The kitty will be ticked off, so be prepared. A bench to the height of the window, and the kitty will be happy..................

I’m not sure why u feel u need to put anything. Once u have ur curtains I think that may be enough.

If you really love yellow, and don't want a neutral:

Accent Chair, 2Pcs Set of Burnt Yellow" Circular" · More Info

I think I'd prefer something contrasting with lovely stone nearby... this would go better with candles, etc.... ?

Flower Power Accent Chair, Cascade Pewter · More Info

I have had cats -- sit and play with feather toy! it's lotsa color...

Best Armless Slipper Chair, Harvest · More Info

Seems pretty with "British bun foot legs in cherry mahogany finish / covered in grey and sage linen/cotton paisley."

Hampton Pillowtop Bench, Light Gray/Off White · More Info

A large plant in a pretty pot that coordinates with your decor.

Lovely courtesy Beverly. Lose the candle sticks. A fire is a thousand candles. You don't need the clutter.

Drapes on the windows forget the rug in the DR it is too small and you do not have space for a bigger one then if all that is done if you still feel like something is needed under the window I would just d o a bench.