Hello tcwillia,

A mantle would certainly add some definition to your room and would provide a strong focal point for your large mirror. A shelf may not provide quite enough balance for both of those large dark pieces. Here are a few examples which might work, simple, but bulky enough to make the entire wall stand alone:







Each of these product sites have links to stores.... it may be worth investigating to determine if there is a custom shop in your location.

Best of luck with your decorating and please let us know if you need assistance,

Elizabeth Cabell, ASID, CID
Cabell Design Studio

Thanks, Elizabeth! I'll be sure to reach out to your team.