Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Single Built Works (hierarchy name)
5. single built works (built environment)
6. [single built works by specific type]
7. [single built works by condition]

Anotations

Scope note:

Structures, which are constructions of any kind artificially fabricated, that no longer exist. Examples include structures known from archaeological evidence or historical records, but now destroyed or lost. For structures that exist in ruins or are abandoned, use "abandoned structures."