Complex sentence: After working with Stanzione, he traveled to Rome and then return to Naples where he was a follower of Mattia Preti, he painted a "St Gregory" and a "San Carlo Borromeo" for the Church of the Santissimi Apostoli of Naples.
Split into simpler sentences: After working with Stanzione, he traveled to Rome and then return to Naples where he was a follower of Mattia Preti. He also painted a "St Gregory" and a "San Carlo Borromeo" for the Church of the Santissimi Apostoli of Naples.