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. residential structures
9. dwellings
10. multiple dwellings
11. apartment houses
12. tenement houses

Anotations

Scope note:

Apartment houses offering an improvement over standard long, narrow tenements by including air and light shafts between adjacent buildings resulting in characteristic dumbbell-shaped plans; common in New York City between 1879 and 1901, after which their construction was banned.