- Italy--Sicily1
- Italy--Venice1
- Jerome, Saint, -419 or 4201
- John, the Baptist, Saint1
- Kings and rulers--Duties1
- Latin poetry1
- Ludovico Sforza, Duke of Milan, 1452-15081
- Manuscripts, Catalan1
- Manuscripts, Greek (Medieval and modern)1
- Manuscripts, Spanish1
- Martellini, Vincenzio1
- Materia medica1
- Mathematics1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medici, Alamanno de'1
- Medici, Bernardo de'1
- Medici, Lorenzo de', 1449-14921
- Medicine1
- Medicine--Formulae, receipts, prescriptions1
- Mediterranean Region1