Bust used as an architectural adornment

Wikipedia Word definitions in Wikipedia
Protome (Greek προτομή) is an adornment on utensils or works of art in the form of a frontal view of an animal head or bust of a human . Protomes are often featured in ancient art.

Wiktionary Word definitions in Wiktionary
n. A decorative element, on ancient artefacts, based on the head of an animal or bust of a person