Niccolò Massa (Italian: [nikkoˌlɔ mˈmassa]; 1485–1569) was an Italian anatomist who wrote an early anatomy text Anatomiae Libri Introductorius in 1536. In 1536 he described the cerebrospinal fluid. Massa graduated from the Venetian College of Physicians with a degree in surgery in 1515 and then with a degree in medicine in 1521. He lived and practice medicine in Venice his entire life and was one of the most widely respected physicians of the early sixteenth century. IN 1524 he was appointed physician to the Scuola di S. Giorgio, and the nunnery of the Sepulchre. Massa taught, examined candidates and served as Consigliere for the Venetian College of Surgeons as well.