Fiore Dei Liberi
Fiore Furlano de Civida d'Austria delli Liberi da Premariacco (ca. 1350s - 1410s) was a Medieval master of arms and the earliest Italian master from whom we have an extant martial arts manual. His Flower of Battle is also the third oldest fighting manual yet discovered (after the MS I.33 and the HS 3227a), and the most extensive from the Medieval period.
Read more about Fiore Dei Liberi: Life, The Flower of Battle