My first thought is that the picture is too small. I would get something that in the whole area. The molding looks like a frame.

Can we see a picture that shows the whole fireplace from floor to ceiling?

A fuller view of the area will help… but…this is a very detailed..ornate surround that calls for larger scale ….bolder…even simpler …decor …that relates/connects …with the rest of the space

Hi. Happy New Year! That's a lovely fireplace!

I would start over. The scale of the items is too small and they aren't working together.

Design doesn't happen in a a vacuum. Harmony (everything working together) is the key to an excellent design. So, in order to help you, I would need

1) Photos of all 4 walls of the space.

2) An inspiration photo of what you want your room to look like (doesn't have to be exact, just an idea of a space/s you like).

At that point, I can help you more. Thanks!

Everything there is too small.

Start with art that fills 85% of the niche. It doesn’t have to be bold colors - I would look for a watercolor, a serene landscape.

I agree to get a larger piece of art for sure . I rarely like mirrors on mantels since they usually do not reflect anything worth seeing twice . IMO the nice piece of art and be done. Not every flat surface needs decor that surround is quite ornate so IMO nothing else needed

The answer is not adding, but using more appropriately sized/complementary items with different heights/proportions, as the aim is to create balance. It’s not easy and bring home different accessories that suit your room (that can be returned) and test, stand back and test again 😊.

Get a piece of art just a smidge smaller than the inside molding. A square canvas with a simple black frame would tie in the firebox. The clock is pretty but too small. Do you have a stack of books you can use as a riser for it and move it to the far right. Your candlesticks or another tall piece can be moved to the left. Leave some negative space for your eye to rest.