The point about the residences of the Roman elite, whether of senators in Rome or of local bigwigs outside it, is that they were not private houses in modern terms; they did not (or not only) represent a place to escape from the public gaze. To be sure, there were some hideaways, such as Cicero’s retreat on Astura, and some parts of the house were more private than others. But in many ways domestic architecture was meant to contribute to the public image and reputation of the prominent Roman, and it was in his house that much public business was done.
