- Medici, Lorenzo de', 1449-14921
- Medici, Lorenzo di Pierfrancesco de', 1463-15031
- Medici, Niccolò de'1
- Medici, Nicolo de'1
- Medici, Ottavia Altoviti1
- Medici, Raffaele de'1
- Medici, Vanne de'1
- Medicine, Ayurvedic--Formulae, receipts, prescriptions1
- Medicine, Greek and Roman--Manuscripts1
- Medicine, Popular1
- Medicine--Practice1
- Meditation--Jainism1
- Mediterranean Sea--Aegean Sea1
- Meistersinger1
- Melanchthon, Philip, 1497-1560. De officio principum1
- Mellini, Piero1
- Memorial books1
- Mendoza, Antonio de, approximately 1492-15521
- Menelaus, of Alexandria. Spherica1
- Meneses, Pedro de, Conde de Vila Real, -14371