text: De rerum natura Poggio's most famous find was the discovery of the only surviving manuscript of Lucretius's De rerum natura ("On the Nature of Things") known at the time, in a German monastery (never named by Poggio, but probably Fulda), in January 1417. Poggio spotted the name, which he remembered as quoted by Cicero. This was a Latin poem of 7,400 lines, divided into six books, giving a full description of the world as viewed by the ancient Greek philosopher Epicurus (see Epicureanism).
  The manuscript found by Poggio is not extant, but fortunately, he sent the copy to his friend Niccolò de' Niccoli, who made a transcription in his renowned book hand (as Niccoli was the creator of italic script), which became the model for the more than fifty other copies circulating at the time. Poggio would later complain that Niccoli had not returned his original copy for 14 years. Later, two 9th-century manuscripts were discovered, the O (the Codex Oblongus, copied c. 825) and Q (the Codex Quadratus), now kept at Leiden University. The book was first printed in 1473.
  The Pulitzer Prize-winning 2011 book The Swerve: How the World Became Modern by Stephen Greenblatt is a narrative of the discovery of the old Lucretius manuscript by Poggio. Greenblatt analyzes the poem's subsequent impact on the development of the Renaissance, the Reformation, and modern science.