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 material or technique]

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Object Genres
4. object genres
5. object genres by material or technique

Anotations

Scope note:

Visual works, including architecture, that are made of concrete, which is a hard, strong construction material comprising a mixture of sand, gravel, crushed rock that may be poured into molds.