The insulae were divided into individual units, each of which consisted of one or more rooms. The units were typically small and dark, and they often lacked windows. The artisans would often work in their homes, and they would often share their living space with their families and apprentices.
The insulae were located in all parts of Rome, but they were most concentrated in the city center. The areas near the Forum and the Colosseum were particularly popular with artisans, as these were areas where there was a high demand for their skills.
The insulae were an important part of ancient Rome, as they provided housing for the city's artisans and other working-class people. However, they were also often overcrowded and unsanitary, and they were a major source of fire danger.