A halo hat (sometimes halo brim hat) is a millinery design in which the headgear acts as a circular frame for the face, creating a halo effect. The design is said to date back to the late 19th century, when it was known as the aureole hat; this name is sometimes still used. It may also be known as the angel hat or bambini – the latter said to derive from Italian for terracotta plaques depicting the infant Christ.