Gian Francesco Poggio Bracciolini (11 February 1380[2] – 30 October 1459), best known simply as Poggio Bracciolini, was an Italian scholar and an early humanist. He was responsible for rediscovering and recovering a great number of classical Latin manuscripts, mostly decaying and forgotten in German, Swiss, and French monastic libraries. His most celebrated find was De rerum natura, the only surviving work by Lucretius.
Titus Lucretius Carus (c. 99 BCE - 55 BCE) was a Roman poet and philosopher. His only known work is the philosophical poem De rerum natura, a didactic work about the tenets and philosophy of Epicureanism, and which is usually translated into English as On the Nature of Things.