- Medici, Ottavia Altoviti1
- Medici, Piero di Lorenzo de', 1472-15031
- Merchants1
- Metaphysics1
- Metaphysics (Aristotle)1
- Military art and science1
- Monasticism and religious orders1
- Monasticism and religious orders--Rules1
- Monte, Leonora Concini, marchesa di1
- Morocco1
- Napoleonic Wars (1800-1815)1
- Naselli, Baldassare1
- Notarial documents1
- Ospedale degli Innocenti (Florence, Italy)1
- Otto I, Holy Roman Emperor, 912-9731
- Paganelli, Roberto1
- Papacy1
- Papal documents1
- Paul V, Pope, 1552-16211
- Pazzi Conspiracy (1478)1