Complex sentence: He worked for his uncle Cardinal Filippo Sega, an important diplomat for the Papacy (d.1596), and became a protege of the art-loving Cardinal Odoardo Farnese, acting as his secretary.
Split into simpler sentences: He worked for his uncle Cardinal Filippo Sega, an important diplomat for the Papacy (d.1596). He became a protege of the art-loving Cardinal Odoardo Farnese, acting as his secretary.