Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Visual Works (hierarchy name)
5. visual works (works)
6. [visual works by form]

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication
4. Visual Works
5. visual works
6. visual works by form
7. polyptychs

Anotations

Scope note:

Works comprising pairs of panels hinged together. They were used by the ancient Romans for writing tablets, often having images on the outer surfaces. In Medieval and later times, they were used primarily to support images for altarpieces and other purposes, most often composed of carved ivory or of painted wood panels, with the primary images on the interior surfaces.