- Italy--Sarteano1
- Italy--Siena7
- Italy--Tortona2
- Italy--Volterra1
- John VIII Palaeologus, Emperor of the East, 1392-14481
- Land grants1
- Leo X, Pope, 1475-15211
- Letters, Papal1
- Ludwig IV, Holy Roman Emperor, 1282?-13471
- Manuscripts1
- Manuscripts, Latin20
- Manuscripts, Latin (Medieval and modern)8
- Manuscripts, Medieval5
- Manuscripts, Renaissance18
- Massachusetts--Boston1
- Michigan--Kalamazoo2
- Military religious orders1
- Monasticism and religious orders1
- New Jersey--Princeton1
- Orden de Santiago1