- Medici, Lorenzo de', 1449-14922
- Medici, Luisa de'2
- Medicine, Magic, mystic, and spagiric2
- Mediterranean Region2
- Mediterranean Sea2
- Middle East--Jerusalem2
- Monastic and religious life2
- Morso family2
- Mysticism--Catholic Church2
- Naselli family2
- Nautical charts2
- Ospedale di San Bartolomeo (Florence, Italy)2
- Papal nuncios2
- Part songs, Italian2
- Paul III, Pope, 1468-15492
- Paul IV, Pope, 1476-15592
- Penitentials2
- Petrarca, Francesco, 1304-13742
- Philip II, King of Spain, 1527-15982
- Philip IV, King of Spain, 1605-16652