mural; fresco; wall painting
Refers to any painting or artwork directly applied to a wall or ceiling, including ancient frescoes and modern murals.
The church's mural was very beautiful.
Ancient wall paintings remain in this cave.
The artist painted a mural on the church wall.
Ancient murals still remain in the cave.
Experts restored the cracked mural.
The murals of the Sistine Chapel are world-famous.
壁紙 is wallpaper (a manufactured covering), whereas 壁画 is an artistic painting created on a wall; the two share 壁 but differ completely in nature.
「面」 can be used for 壁画 when counting them as flat surfaces painted on a wall, like murals covering a wall panel.
From 壁 (wall) + 画 (picture, painting).