- Medina Sidonia, Alonso Pérez de Guzmán, duque de, 1550-16191
- Medina Sidonia, Juan Alonso de Guzmán, Duque de, -15581
- Medina, Francisco de, 1544-16151
- Meditations8
- Mediterranean Region1
- Mediterranean Sea10
- Meistersinger1
- Melanchthon, Philip, 1497-1560. De officio principum1
- Memory2
- Mendoza, Antonio de, approximately 1492-15521
- Meneses, Pedro de, Conde de Vila Real, -14371
- Mensural notation7
- Merchants10
- Mesgissier, Martin le1
- Metaphysics5
- Metaphysics (Aristotle)5
- Meteorologica (Aristotle)1
- Metochites, Theodoros, 1270-13321
- Mexico20
- Mexico--Chiapas1