Any long, narrow, horizontal panel or ornamental band used for decorative purposes around the walls of a room or exterior walls of a building.
In Greco-Roman architecture it is a horizontal band, often decorated with relief sculpture, between the architrave and cornice of a building. The most famous decorative frieze is on the outer wall of the Parthenon in Athens, a 525-ft (160-m) representation of the ritual procession of the Panathenaic festival.