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 form]
8. [single built works by form: massing or shape]

Anotations

Scope note:

Denotes semi-underground buildings forming self-contained structures without a built floor, common to England and northern Europe throughout the first millennium CE and used variously for such functions as houses, storehouses, and workshops; use "pit dwellings" for prehistoric houses whose floors are generally deeply set below ground level.