Leonardo Bruni

Leonardo Bruni or Leonardo Aretino (c. 1370 – 9 March 1444) was an Italian humanist, historian and statesman, often recognized as the most important humanist historian of the early Renaissance. He has been called the first modern historian. He was the earliest person to write using the three-period view of history: Antiquity, Middle Ages, and Modern. The dates Bruni used to define the periods are not exactly what modern historians use today, but he laid the conceptual groundwork for a tripartite division of history.

Notable works: Historiae Florentini populi, Rerum suo tempore gestarum commentarius, De bello italico adversus Gothos, Commentarius de bello Punico, De militia, Dialogi ad Petrum Paulum Histrum, De interpretatione recta, Crito

Source: Wikipedia — https://en.wikipedia.org/wiki/Leonardo_Bruni