Which part of a house serves as the central hall?

The atrium serves as the central hall in a Roman house. It is a large, open indoor space that is typically the first area one enters upon entering the home. In many Roman designs, the atrium was not only the focal point of the household but also served multiple purposes, such as a reception area and a space for socializing. It often featured an opening in the roof (the compluvium) to allow natural light and rain to enter, as well as a basin (the impluvium) to collect water.

In contrast, the vestibulum is a small entrance area that leads into the atrium, the tablinum is a space usually located between the atrium and the peristyle where the head of the household would conduct business, and the oecus is a larger hall used for entertaining guests or family gatherings. Understanding the function and layout of these areas provides insight into the culture and social practices of Roman life.