- Medici, Lorenzo di Pierfrancesco de', 1463-15031
- Medici, Nicolo de'1
- Medici, Ottavia Altoviti1
- Medici, Raffaele de'1
- Medicine1
- Medicine--Formulae, receipts, prescriptions1
- Meditations1
- Mediterranean Region1
- Mediterranean Sea1
- Michele, Lorenzo de'1
- Michele, Olivo di1
- Military art and science1
- Mints1
- Miserere1
- Molino, Gasparo1
- Monasticism and religious orders1
- Monasticism and religious orders for women--Rules1
- Monogrammed bindings1
- Monte di pietà (Florence, Italy)1
- Monte, Leonora Concini, marchesa di1