The Insulae-class residency was a structure present in colonies belonging to the Romulan Star Empire.
These structures provided housing for a majority of Romulan colonists with the higher echelons being housed within the Forum-class central hub. The security forces were housed in the security center. The residency itself provided all the necessary amenities such as kitchen, dormitories and recreation hall which were required for to create fit, healthy and useful members for the colony.
There were two social classes that resided within these facilities; those with political fervour and those who were the criminal elements within society. Certain Romulans volunteered for colonial duty as a fast track to political success. While the more criminal or rogue-ish elements of the colonists were sent for correctional education. This meant that there was a lot of tension within these structures. (TOS video game: New Worlds)