Robert was born on 1542 in Montepulciano, in Tuscany, and became a Jesuit. He taught theology in Rome, and was active in disputation against the Protestants, where his effectiveness was increased by his charity and moderation. He was a moderating influence in the Galileo affair, and gave the latter much friendly advice. In due course he was nominated a cardinal and archbishop of Capua; but it is for his writings that he is chiefly known. He did not only write controversial works: he also wrote two catechisms and some devotional commentaries on the Psalms and on the Seven Last Words of Jesus hanging on the Cross. He died in 1621.