A DESCRIPTION OF THE METHODS ADOPTED BY THE DUKE VALENTINO WHEN MURDERING VITELLOZZO VITELLI, OLIVEROTTO DA FERMO, THE SIGNOR PAGOLO, AND THE DUKE DI GRAVINA ORSINI 
THE PRINCE 
DISCOURSES ON LIVY [1512-17]
THE ART OF WAR [1519-20]
THE LIFE OF CASTRUCCIO CASTRACANI OF LUCCA 
HISTORY OF FLORENCE, AND OF THE AFFAIRS OF ITALY, FROM THE EARLIEST TIMES TO THE DEATH OF LORENZO THE MAGNIFICENT [1521-5]
Niccolò Machiavelli , or more formally Niccolò di Bernardo dei Machiavelli, was an Italian Renaissance historian, politician, diplomat, philosopher, humanist, and writer. He has often been called the founder of modern political science. He was for many years a senior official in the Florentine Republic, with responsibilities in diplomatic and military affairs. He also wrote comedies, carnival songs, and poetry. His personal correspondence is renowned in the Italian language. He was secretary to the Second Chancery of the Republic of Florence.