A biapsidal hall indicates a room that is generally rectangular in shape, used as a passage, waiting area or hallway. The hall is biapsidal because its two short sides end in an apse.
In this case, the apse is covered by a segmental hemisphere that connects with the vault covering the hall.![](https://www.smarteducationunescosicilia.it/wp-content/uploads/2020/06/foto-03-7-1024x768.jpg)