mural

US /ˈmjʊr.əl/
UK /ˈmjʊr.əl/
"mural" picture
1.

a painting or other art form executed directly on a wall or ceiling.

:
The artist spent months creating the vibrant mural on the side of the building.
Ancient cave paintings are considered early forms of murals.
1.

of or relating to a wall

:
The architect designed a building with a large mural space.
The ancient city walls had intricate mural decorations.