Fireplace, identification and removal component
I'm guessing it's 100% decorative. And that looks to be a new-ish insert (or recently repainted and rebricked).

You'll have to get into the fireplace and see with a scope or mirrors where they go, but I'm guessing it's just drilled into the facade brick and screwed in under those flower heads.

It does look pretty cool though. My wife would kill me however if I put it in.