Roman Station Church: [XXI], Basilica di Santa Pudenziana

The basilica of Santa Pudenziana is a 4th-century church of Rome, dedicated to Saint Pudentiana, sister of Saint Praxedis and daughter of Saint Pudens. It has been suggested that there was no such person as Pudentiana, the name having originated as an adjective used to describe the house of Pudens, Domus Pudentiana.
The church of Santa Pudenziana is recognized as the oldest place of Christian worship in Rome. It was built over a 2nd-century house, probably during the pontificate of Pius I in 140–155 AD, and re-uses part of a bath facility still visible in the structure of the apse. This church was the residence of the Pope until, in 313, Emperor Constantine I offered the Lateran Palace in its stead. In the 4th century, during the pontificate of Pope Siricius, the building was transformed into a three-naved church.