- Medici, Elisabetta de'1
- Medici, Fernando de'1
- Medici, Giovanni Giacomo de', marchese di Marignano, 1495-15551
- Medici, Giulio de'1
- Medici, Lorenzo di Pierfrancesco de', 1463-15031
- Medici, Nicolo de'1
- Medici, Raffaele de'1
- Medicinal plants1
- Medicine, Medieval1
- Medicine--Formulae, receipts, prescriptions1
- Medicine--Study and teaching1
- Megilat Purim al Miṣriyin1
- Meistersinger1
- Melanchthon, Philip, 1497-1560. De officio principum1
- Mexico--Culhuacán1
- Mexico--Zempoala (Hidalgo)1
- Michele, Lorenzo de'1
- Michele, Olivo di1
- Middle East1
- Middle East--Jerusalem1