The story of Saint Cecilia, from her conversion to where she is today, is one of the most touching in terms of her as an individual and most interesting for the development of churches in Rome. The story of Cecilia begins in the reign of the emperor, Septimius Severus (AD 193-211). Cecilia was a young woman of faith who was engaged to a Roman, Valerius. On their wedding day she converted him to Christianity, and he, subsequently, converted his brothers.

One of the most fascinating types of churches in Rome are the titular churches — churches that were once house-churches, and still today...