Ten T-shaped rooms opened onto the central corridor HS1, five on each side HS 4-8 and HS 17-21. Their particular shape is due to three alcoves in which the beds were placed: therefore they served as cubicles.
Their black and white mosaic pavements have a square central field with a more refined decoration, arabesques and floral motifs. The three rectangles corresponding to the alcoves have simpler geometric designs, given that they were partly hidden by the beds.
In rooms HS15 and HS24 there were two multi-seat latrines. Near room HS22 a staircase HS1a went up to the upper floor of the building, which does not exist any more.
The staircase of room HS25 led instead to the upper floors of the Greek and Latin libraries.
Function and meaning
The ten cubicles with alcoves for the beds and latrines show that this building was a dormitory, while the nearby Imperial Triclinium was the living area.
The black and white mosaics, the multiple latrines and the secluded position prove that the building belonged to the secondary quarters of the Villa, intended for high-ranking personnel such as praetorians or freedmen.
SEE: Marina De Franceschini, Villa Adriana. Mosaici, pavimenti, edifici, 1991, Hospitalia pp. 33-54 e 358-366. Hospitalia and Imperial Triclinium as a whole: pp. 374-376.