Complex sentence: Another son, Giulio Cesare Sacchetti was an influential cardinal and twice included in the French Court's list of acceptable candidates (papal conclave of 1644 and papal conclave of 1655) for the Papacy.
Split into simpler sentences: Another son, Giulio Cesare Sacchetti was an influential cardinal. He was twice included in the French Court's list of acceptable candidates (papal conclave of 1644 and papal conclave of 1655) for the Papacy.