What is the name of the small entry room of a Roman house that leads to the atrium?

The small entry room of a Roman house that leads to the atrium is known as the Fauces. This space served as a transitional area, providing access from the entrance of the house into the main living area known as the atrium. The Fauces also played a practical role in controlling the flow of visitors, allowing owners to manage visitors' entry before they entered the more private areas of the home.

In contrast, the other terms refer to different features of Roman domestic architecture. The Peristyle is an open courtyard surrounded by columns, typically found at the back of the house, while the Hortus refers to a garden area, often located in conjunction with the Peristyle. The Piscina is a term used for a pool or basin, which could be found in various locations in Roman homes, but does not serve as an entryway into the atrium. Understanding the specific function and placement of the Fauces within a Roman house is essential to comprehending the layout and architectural design of ancient Roman domestic life.