Online resources
1. Machiavelli's writings
Various works by Machiavelli on Project Gutenberg (web), in English, German, Italian.
Works by Machiavelli on Wikisource (web) en Italian, French, English.
Works by Machiavelli on the Internet Archive (web) in Italian, English, etc.
2. Related texts
De Pictura by Leon Battista Alberti (web), "the window that opens onto the story".
The History of Rome by Titus Livius, on The Internet Archive.
The Histories by Polibius.
The Republic by Cicero, on Project Gutenberg.
De Rerum Natura by Lucretius, on Project Gutenberg.
Dante's works on Project Gutenberg.
Plato's Republic on Project Gutenberg.
History of the Peloponnesian War by Thucydides, on Project Gutenberg
Tetrabiblos by Claudius Ptolemy.
3. Prefaces, articles, notices, etc.
Monsieur Machiavel ou le coeur humain dévoilé (pdf in French), Preface by Jean Giono to Toutes les lettres de Machiavelli, nrf Gallimard, Paris, 1955.
Extracts from Nietzsche (pdf in French) writing about Machiavelli, the Renaissance and Cesare Borgia.
Biographical note on Treccani.it (web) by Giorgio Inglese, in Italian.
Entry in the Stanford Encyclopedia of Philosophy (web).
My notes on extracts of The Prince (pdf).
4. Videos, podcasts, etc.
Histoire des pouvoirs en Europe occidentale, XIIIe-XVIe siècle, all Patrick Boucheron's lectures at the Collège de France 2015-2025, audio/video, in French.
L'art de gouverner à Florence (1494-1530), Jean-Claude Zancarini's lectures on video, from Savonarola to Guicciardini and Machiavelli of course. 2007, in French.
Le Prince de Machiavel, 4 episodes of the programme Les Chemins de la philosophie on France Culture, hosted by Géraldine Mosna-Savoye, with Sandro Landi, Thierry Ménissier, Vincent Martigny and Agnès Cugno. 2022, in French.
Un été avec Machiavel by P. Boucheron, 30 episodes of 4 minutes on France Inter, 2016, in French.