What is the definition of a bust sculpture?

A bust sculpture is a realistic representation of a person's upper body in the form of a statue. A bust normally consists of the head and neck of a human figure, and it may also show parts of the shoulders and chest.

Bust sculptures were popularized by the Romans as a form of portraiture, and the medium has been used to document the faces of a number of historical figures, including Charlemagne and Francis Bacon. A bust can be made from various materials, such as marble, wood, wax or bronze. A sculpture composed of the head and neck of an animal or mythological creature is called an aust.