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. gate structures

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment
4. Single Built Works
5. single built works
6. single built works by specific type
7. single built works by function
8. ceremonial structures
9. religious structures
10. shrines

Anotations

Scope note:

In the context of ancient Roman architecture, this term usually refers to passageways that allowed for closure at either end. Originally these structures functioned as bridges or as crossings of the pomerium. The term was later applied to gateways and over time post-and-lintel doors were replaced by arches. Later jani were often vaulted as well. There were several noteworthy jani in Rome, most notably the Janus Geminus, the most important shrine of Janus in the city. The closed gates of the Janus Geminus signaled that Rome was at war and open gates meant that it was at peace. It is not known if all jani were considered sacred in some sense but the term certainly has some religious connotation.