The praetorian quarters are a series of about ten bedrooms, including a latrine with running water. These rooms show the most interesting and best preserved floor mosaics of the Villa Adriana.
This building is also known as the hospitalia or guest house. The function of many buildings in the Villa Adriana is not known. Frequently, the actual purpose of buildings is unknown, but they are given designations based on similar structures found at other archaeological sites.