 Her earliest documented attestations identify her as the patron of the church, not as a martyr, and previously the church was identified in the earliest, fourth-century documents by its title "of Gaius" by the Baths of Diocletian or as ""ad duas domos"" ("near the two houses").It is mentioned in connection with a Roman synod of 499.The Church of Santa Susanna is one of the oldest titles in the city of Rome.