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 function]
8. exhibition buildings

Anotations

Scope note:

Buildings housing devices for projecting celestial images onto the interior of a dome for public viewing; may also be used for the projecting mechanisms. For mechanical models of the solar system, use "orreries."