picture rail

US /ˈpɪk.tʃər reɪl/
UK /ˈpɪk.tʃər reɪl/
"picture rail" picture
1.

a horizontal strip of wood fixed to a wall, from which pictures can be hung

:
We decided to install a picture rail in the living room to hang our artwork.
The old house still had its original decorative picture rails.