Complex sentence: Born of a noble family in Ferrara, Rossetti went to Rome as a young man and was employed as a prelate to Pope Urban VIII and his Barberini family, especially his nephews Francesco Barberini and Antonio Barberini.
Split into simpler sentences: Born of a noble family in Ferrara, Rossetti went to Rome as a young man. He was employed as a prelate to Pope Urban VIII and his Barberini family, especially his nephews Francesco Barberini and Antonio Barberini.