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. recreation structures
9. recreation buildings
10. sports buildings
11. [sports buildings by form]

Anotations

Scope note:

Oblong ancient Roman enclosures that are curved at one end, with tiered seating on three sides, and built for chariot and horse racing. Meaning overlaps with similar structures in Greek cities of the Hellenistic, Roman, and Byzantine eras, "hippodromes (Greek sports buildings)." For sports structures used for horse racing in more modern contexts, use "horse racetracks."