The Roman basilica's long colonnaded nave leading to an apse gave way to the Greek cross with a central space surrounded by arches and topped by a dome.
The central space was paved, and has a fountain in the middle.
mnli hypothesis: The central space was paved, and has a fountain in the middle. premise: The Roman basilica's long colonnaded nave leading to an apse gave way to the Greek cross with a central space surrounded by arches and topped by a dome.