Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Built Complexes and Districts (hierarchy name)
5. districts
6. [districts by location or context]
7. urban areas

Anotations

Scope note:

Core or central areas of cities or towns that are either the oldest areas of the city or the core business areas. The term is thought to derive from these areas, as the oldest areas, having the lowest street numbers; alternatively, term may derive from the development of New York City, where the oldest section is in the south, at the bottom of a map.