A board of amazing craftmanship. These could be two- or three-dimensional representative or abstract forms, usually via carving stone or wood, or by casting metal or plaster
"Seneca", bronze with inlaid eyes, Roman, 1st century CE. Found in the Villa of the Papyri in Herculaneum. While commonly called Seneca that is only one possibility and academics usually refer to it more correctly as the head of a man, possibly a poet or philosopher.