Roger of San Severino was the Archbishop of Benevento from 1179 until his death. He was probably a younger brother of Count William of San Severino, the most powerful lord in the Cilento and a royal justiciar. He may also have been a cousin of Count Robert of Caserta. He was a monk at Montecassino before becoming bishop at a young age. His high aristocratic lineage and monastic vows were both unusual for bishops of southern Italy at the time. He was appointed archbishop of Benevento and cardinal-priest of Sant'Eusebio by Pope Alexander III.