Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. architectural elements
7. [structural elements and components for structural elements]
8. structural elements
9. [spanning and projecting structural elements]
10. [arches and arch components]
11. arches
12. [arches by form]

Anotations

Scope note:

Round arches in which the voussoirs increase in length as they approach the center, so that the curve of the extrados is more vertical in proportion than the curve of the intrados. For similar arches when pointed, use "Italian pointed arches."