Niccolò Guicciardini Corsi Salviati (born 28 May 1957 in Firenze) is an Italian historian of mathematics. He is a professor at the University of Bergamo, and is known for his studies on the works of Isaac Newton.Guicciardini obtained his Ph.D. in 1987 under the supervision of Ivor Grattan-Guinness.In 2011 he was awarded the Fernando Gil International Prize for the Philosophy of Science.